DEPARTMENT OF LICENSING AND REGULATORY AFFAIRS  
DIRECTOR’S OFFICE  
MICHIGAN BOILER RULES  
(By authority conferred on the director of the department of licensing and regulatory  
affairs by sections 4, 4a and 13c of 1965 PA 290, MCL 408.754, MCL 408.754a, and  
MCL 408.763c, and executive reorganization order nos. 2003-1, 2008-4 and 2011-4,  
MCL 445.2011, MCL 445.2025, and MCL 445.2030)  
PART 1. GENERAL PROVISIONS  
R 408.4001 Scope.  
Rule 1. These rules establish minimum standards of safety for  
the  
use,  
construction, installation, inspection, alteration, and repair of boilers; licensing of boiler  
inspectors, boiler repairers, and boiler installers; requirements for permits to install,  
repair, and alter; and fees to be charged.  
History: 1979 AC.  
R 408.4011 Rescinded.  
History: 1979 AC; 1995 AACS; 1998-2000 AACS.  
R 408.4012 Definitions.  
Rule 12. (1) “Accident” means a sudden and accidental breakdown of a boiler or a part  
of a boiler that results in physical damage to the boiler which necessitates the repair or  
replacement of the boiler or a part of the boiler. “Accident” does not mean a breakdown  
due to any of the following unless a unique or unusual explosion hazard exists as a result  
of the breakdown:  
(a) Normal erosion.  
(b) Corrosion.  
(c) Wastage of metal that requires restoration.  
(d) Leaking tubes.  
(e) Weakened metal, such as water legs or handhole areas.  
(2) “Act” means 1965 PA 290, MCL 408.751 to 408.776 and known as the boiler act of  
1965.  
(3) “Aftercooler” means a device used for lowering the temperature of a boiler blowoff  
discharge before it enters the building drain.  
(4) “Alteration” means any change in the item described on the original manufacturer’s  
data report that affects the pressure-containing capability of the boiler or its piping. A  
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nonphysical change such as an increase in the maximum allowable working pressure  
(internal or external) or design temperature of a boiler or its piping is an alteration.  
(5) “ASME,” “ASME boiler and pressure vessel code,” “ASME code,” or “code”  
means the boiler and pressure vessel code of the American Society of Mechanical  
Engineers, with addenda, as prescribed and approved by the council of the society.  
(6) “Authorized inspector” means an individual who is designated as an authorized  
inspector by an authorized inspection agency, who holds a valid certificate of  
competency and national board commission with an “A” or “B” endorsement, and who is  
employed by the authorized inspection agency that assumes responsibility for the  
individual’s actions.  
(7) “Board of boiler rules” or “board” means the board created by the act.  
(8) “Boiler assembler” means a corporation, company, partnership, or individual who  
assembles a boiler that has been delivered in pieces. For ASME code section I power  
boiler assemblies, a boiler assembler shall possess the appropriate code symbol stamps.  
(9) “Boiler blowoff piping” means the piping, fittings, and valves from the boiler to the  
blowoff tank, blowoff separator, or other safe point of discharge through which the water  
in the boiler may be blown out under pressure, except for drains such as those used in  
water columns, gauge glasses, or piping to feed water regulators and similar devices.  
(10) “Boiler blowdown vessel” means an unfired pressure vessel into which water is  
discharged above atmospheric pressure from a boiler blowoff line.  
(11) “Boiler installation” means the installation of a boiler, including all connected  
piping, valves, fittings, flanges, firing equipment, controls, appurtenances, and  
auxiliaries. The term includes the field assembly of boilers.  
(12) “CSD-1” means the ASME code for controls and safety devices for automatically  
fired boilers.  
(13) “Certificate of competency” means a certificate issued to a person who has passed  
an examination for inspectors prescribed by the board of boiler rules.  
(14) “Chief inspector” means the chief boiler inspector appointed under the act.  
(15) “Condemned boiler” means a boiler that has been inspected and declared unsafe or  
rejected for use by an inspector who is qualified to take such action and who has applied  
a stamping or marking designating its rejection.  
(16) “Department” means the department of licensing and regulatory affairs.  
(17) “Deputy inspector” means an inspector who is licensed under the act and  
employed by the director.  
(18) “Existing installation” means and includes any steam boiler constructed, installed,  
placed in operation, or contracted for before August 10, 1917, or any hot water heating or  
supply boiler constructed, installed, placed in operation, or contracted for before the  
effective date of these rules.  
(19) “External inspection” means an inspection which is conducted while the boiler is  
under pressure and which does not involve examination of the internal surfaces of the  
pressure parts of the boiler.  
(20) “Field assembly” means assembling prefabricated boiler pressure parts without  
field welding or riveting.  
(21) “Field erection” means the erecting and assembling of boiler parts by welding,  
riveting, or other fabrication processes.  
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(22) “Flash tank” means a closed vessel equipped with internal baffles or an apparatus  
for the purpose of separating moisture from flash steam as it passes through the vessel.  
(23) “Hobby” means an interest or activity that a person pursues in his or her leisure  
time without compensation.  
(24) “Hot water heating and hot water supply boiler” means a boiler that operates at  
pressures of not more than 160 psi or temperatures of not more than 250 degrees  
Fahrenheit, at or near the boiler outlet.  
(25) “Incompetence” means a departure from, or a failure to conform to, minimal  
standards of acceptable practice for the occupation.  
(26) “Inspector” means an individual who holds a valid certificate of competency and  
national board commission.  
(27) “Internal inspection” means an inspection made when a boiler is shut down and  
handholes or manholes are opened for inspection of the interior.  
(28) “Labeled” means devices, equipment, appliances, or material to which have been  
affixed a label, seal, symbol, or other identifying mark of a nationally recognized testing  
laboratory, inspection agency, or other organization concerned with product evaluation  
that maintains periodic inspection of the production of the items and by whose label the  
manufacturer attests to compliance with applicable nationally recognized standards.  
(29) “Licensed boiler installer” means a person licensed under the act to engage in the  
business of making piping connections to a boiler or in the business of field-assembling  
boilers.  
(30) “Licensed boiler repairer” means a person licensed under the act to engage in  
making or supervising all phases of boiler repair, alteration, or field erection.  
(31) “Listed” means equipment, appliances, or material included in a list published by a  
nationally recognized testing laboratory, inspection agency, or other organization  
concerned with product evaluation that maintains periodic inspection of production of  
listed equipment, appliances, or materials, and whose listing states either that the  
equipment, appliances, or material meets nationally recognized standards or has been  
tested and found suitable for use in a specified manner. The authority having jurisdiction  
shall utilize the system employed by the listing organization to identify a listed product.  
(32) “Maximum allowable working pressure” or “MAWP” means the maximum gage  
pressure permissible for boiler to operate.  
(33) “Maximum operating pressure” means the maximum operating pressure of the  
complete boiler system as designed, which shall include supply, return, feed, and blow  
off piping.  
(34) “Mechanical assembly” means the work necessary to establish or restore a  
pressure retaining boundary whereby pressure retaining capability is established through  
a mechanical, chemical, or physical interface.  
(35) “Mechanical repair” means a method of repair which restores a pressure retaining  
boundary to a safe and satisfactory operating condition, where the pressure retaining  
boundary is established by a method other than welding or brazing.  
(36) “Miniature boiler” means a power boiler that does not have any of the following:  
(a) An inside diameter of the shell of more than 16 inches.  
(b) A working pressure of more than 100 psig.  
(c) A gross volume of more than 5 cubic feet.  
(d) More than 20 square feet of heating surface.  
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(37) “Miniature locomotive boiler” means a miniature hobby steam locomotive boiler  
which operates on a narrow gauge track that is less than 24 inches wide and which is for  
public display or use.  
(38) “Modular boiler” means a steam or hot-water heating assembly consisting of a  
grouping of individual boilers called modules, intended to be installed as a unit, with a  
single inlet and a single outlet. Modules may be under 1 jacket or may be individually  
jacketed.  
(39) “NBIC” means national board inspection code.  
(40) “New boiler” means a boiler constructed, installed, placed in operation, or  
contracted for after July 1, 1966.  
(41) “Nonstandard boiler” means a boiler that does not bear the national board  
stamping or the stamp of any state or political subdivision which has adopted a standard  
of construction equivalent to that required by the board of boiler rules.  
(42) “Owner or user” means a person, firm, partnership, or corporation that owns or  
operates a boiler within this state.  
(43) “Out-of-use boiler” means a boiler not ready for use having the fuel supply,  
electricity, and all piping that may pressurize the boiler disconnected.  
(44) “Portable boiler” means a boiler which is primarily intended for temporary location  
and which is, by its construction and usage, obviously portable.  
(45) “Pressure-retaining items” means any boiler, pressure vessel, piping, or material  
used for the containment of pressure, either internal or external. The pressure may be  
obtained from an external source, or by the application of heat from a direct source, or  
any combination thereof.  
(46) “Reinstalled boiler” means a boiler which is removed from its original setting and  
which is reinstalled at the same location or reinstalled at a new location.  
(47) “Reinstatement” means the granting of a license or registration, with or without  
limitations or conditions, to a person whose license or registration has been suspended by  
the chief inspector.  
(48) “Rental boiler” means a boiler which is in temporary use for not more than 1 year  
and which may or may not be installed inside a boiler room, temporary room, or  
temporary shed or without external covering.  
(49) “Repair” means the work necessary to restore a boiler or its piping to a safe and  
satisfactory operating condition.  
(50) “Safe point of discharge” means a point of discharge that will protect personnel  
and property from injury due to discharge.  
(51) “Special inspector” means a boiler inspector who holds a license in the state of  
Michigan pursuant to 1965 PA 290, MCL 408.751 to 408.776 and who is regularly  
employed by an insurance company authorized to insure against a loss from boiler  
accidents in this state or by any city that is exempt under the act and has an authorized  
boiler inspection department.  
(52) “Standard boiler” means a boiler that bears the stamp of the national board of  
boiler and pressure vessel inspectors or of another state or political subdivision which has  
adopted a standard of construction equivalent to that required by the board of boiler rules  
of this state.  
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(53) “Traction boiler” means a boiler designed for the express purpose of pulling farm  
equipment or to convert steam power into flywheel energy driving farm apparatus such as  
threshers, saws, or grinding equipment.  
(54) “Used boiler” means a boiler that is being reinstalled by the same owner.  
(55) “Water heater” means a heater for use in commercial or industrial sizes providing  
corrosion resistance for supplying potable hot water at pressures not exceeding 160 psi or  
temperatures not exceeding 210 degrees Fahrenheit. A water heater that does not exceed  
any of the following is exempt from these rules:  
(a) A heat input of more than 200,000 BTU per hour.  
(b) A water temperature of more than 210 degrees Fahrenheit.  
(c) A nominal water-containing capacity of more than 120 gallons.  
(56) Terms defined in the act have the same meanings when used in these rules.  
History: 1998-2000 AACS; 2002 AACS; 2006 AACS; 2009 AACS; 2013 AACS.  
R 408.4013 Rescinded.  
History: 1979 AC; 1995 AACS; 1998-2000 AACS.  
R 408.4015 Rescinded  
History: 1979 AC; 1995 AACS; 1998-2000 AACS.  
R 408.4017 Rescinded  
History: 1979 AC; 1995 AACS; 1998-2000 AACS.  
R 408.4019 Rescinded  
History: 1979 AC; 1995 AACS; 1998-2000 AACS.  
R 408.4021 Rescinded  
History: 1979 AC; 1995 AACS; 1998-2000 AACS.  
R 408.4023 Rescinded  
History: 1979 AC; 1995 AACS; 1998-2000 AACS.  
R 408.4024 Adoption of NBIC by reference.  
Page 5  
Rule 24. (1) The owner shall ensure the inspection, repair, and alteration of boilers,  
piping, and blowdown vessels is pursuant to the NBIC, 2011 edition, except as modified  
by these rules. The code is adopted by reference in these rules and available for  
inspection at the Michigan Department of Licensing and Regulatory Affairs, Bureau of  
Construction Codes, 2501 Woodlake Circle, Okemos, Michigan 48864 or from the  
National Board of Boiler and Pressure Vessel Inspectors, 1055 Crupper Avenue,  
Columbus, Ohio 43229, at a cost as of the time of adoption of these amendatory rules for  
a total of $265.00.  
(2) The accreditation program described in the NBIC for repairs and alterations to  
pressure retaining items is mandatory for repairs to all power boilers and high pressure  
high temperature water boilers and alterations to any boiler not exempt by these rules.  
Repair companies in possession of a certificate of authorization issued by the national  
board of boiler and pressure vessel inspectors to repair and alter pressure retaining items  
shall have in their employ an individual with an appropriate class repairer license issued  
by the boiler division of the department. Repair companies not currently in possession of  
the certificate of authorization or a certificate of authorization issued by ASME shall  
have 1 year from the date of adoption of this rule to secure the certificate. Companies  
currently in possession of a valid certificate issued by ASME have until the next  
certificate review or 1 year, whichever is greater, to secure the certificate of authorization  
identified above. The board may waive the time requirement if appropriate justification  
is presented.  
(3) Where the text of the NBIC refers to the “certificate holder,” the reference shall  
apply to all licensed boiler repairers, except when the reference is in relation to  
completion of NBIC forms and NBIC stamping, the reference shall refer to repair  
companies in possession of a valid certificate of authorization issued by the national  
board of boiler and pressure vessel inspectors to repair and alter pressure retaining items.  
(4) The standard welding procedures referenced in the NBIC are accepted for use in  
this state, but are not mandatory. A licensed boiler repairer who elects to use 1 or more  
of the standard welding procedures shall file a list of the standard welding procedure  
identification numbers with the boiler division of the department before conducting any  
repairs or alterations requiring welding.  
History: 1998-2000 AACS; 2002 AACS; 2006 AACS; 2009 AACS; 2013 AACS.  
R 408.4025 ASME code; adoption by reference.  
Rule 25. (1) A boiler, blow down vessel, and expansion tank shall be constructed as  
prescribed by these rules and the ASME boiler and pressure vessel code, sections I, II,  
III, IV, V, VIII, IX, X, XI, 2010 edition and its 2011a addenda, and ASME code B31.1,  
2010 edition, power piping, are adopted by reference in these rules and are available for  
inspection at the Michigan Department of Licensing and Regulatory Affairs, Bureau of  
Construction Codes, 2501 Woodlake Circle, Okemos, Michigan 48864 or from the  
ASME International, 22 Law Drive, Fairfield, New Jersey 07007, at a cost as of the time  
of adoption of these amendatory rules of $15,500 and $245.00 respectively.  
(2) The board may accept pressure-retaining items which have been constructed to  
standards other than ASME standards and which have been accepted by application of  
Page 6  
the national board of boiler and pressure vessel inspectors’ criteria for registration  
procedure.  
(3) The owner shall not recalculate design maximum allowable working pressures  
based on ASME codes published after 1998 for boilers in-service before December 31,  
1998.  
History: 1979 AC; 1985 AACS; 1995 AACS; 1998-2000 AACS; 2002 AACS; 2006 AACS; 2009  
AACS; 2013 AACS.  
R 408.4026 Inspection and stamping during construction.  
Rule 26. The manufacturer shall register a boiler, blowdown vessel, and  
expansion tank other than a cast sectional boiler built or constructed for use in this state  
after the effective date of these rules, with the national board of boiler and pressure  
vessel inspectors.  
History: 1995 AACS; 1998-2000 AACS; 2009 AACS.  
R 408.4027 Adoption; ASME code CSD-1.  
Rule 27. (1) The owner shall ensure that the installation, maintenance, operation, and  
testing of controls and safety devices is pursuant to manufacturer’s instructions and  
ASME code CSD-1, 2009 edition, except as modified by these rules. The code is  
adopted by reference in these rules and available for inspection at the Michigan  
Department of Licensing and Regulatory Affairs, Bureau of Construction Codes, 2501  
Woodlake Circle, Okemos, Michigan 48864 or from the ASME, 22 Law Drive, Fairfield,  
New Jersey 07007, at a cost as of the time of adoption of these amendatory rules of  
$89.00.  
(2) An owner or user of a boiler system shall ensure that the maintenance and testing of  
controls and safety devices is conducted by an individual with a valid mechanical  
contractor license with the appropriate classification pursuant to the Forbes mechanical  
contractors act, 1984 PA 192, MCL 338.971 to 338.988. Individuals conducting  
maintenance and testing shall be under the guidance and supervision of a licensed  
mechanical contractor.  
(3) An owner or user shall provide the inspector, at the time of certificate inspection,  
with evidence showing the maintenance has been performed and what tests have been  
completed. The evidence shall be a dated and signed service report or checklist, listing  
each control and safety device tested with the manufacturer’s name, model number, set  
point, and actual operational test point. Examples of a report or checklist may be found  
in CSD-1, 2009 edition, appendix C or example form exhibit A. If an owner does not  
provide the inspector with the required evidence of maintenance and testing between  
certificate inspections, then the inspector may issue a certificate of inspection for a term  
less than that stated in R 408.4057.  
Exception: For hot water heating and hot water supply boilers with a BTU input of  
400,000 or less, the requirements of this rule need only be conducted once during an  
inspection cycle but shall be performed within 12 months before the certificate inspection  
required by R 408.4057(1)(c).  
Page 7  
(4) The owner, user, or operator of a boiler system shall ensure that the daily, weekly,  
and monthly operational checks are performed and documented pursuant to the  
manufacturer’s instructions and these rules. If the manufacturer’s instructions are not  
available, CSD-1, 2009 edition, nonmandatory appendix D contains a recommended  
checklist for additional information on periodic checks.  
(5) A manually operated remote shutdown switch as required by CSD-1, 2009 edition,  
shall be located outside of each exit access doorway to the boiler room. The switch may  
be located just inside each exit access doorway should a possibility of tampering or  
weather conditions exist. A licensee may request a deviation from the requirements of  
this subrule by submitting drawings clearly showing the deviation and stating  
justification for the request to the chief inspector for review and approval before the  
installation of a boiler. The chief inspector shall notify the licensee of the approval or  
denial of the request.  
(6) A single manually-operated remote shutdown switch may be used in a multiple  
boiler installation that shares a common boiler room.  
Exception: Kitchen cooking boilers, steam kettles, and steam cookers used for food  
preparation located in a kitchen shall be exempt from a manually operated remote  
shutdown switch and lockable disconnect.  
Exception: Electrically heated or gas fired jacketed steam kettles safety devices at a  
minimum, shall be those required in ASME Code Section-VIII Division-1 2010 and its  
2011a addenda and appendix 19.  
(7) Where applicable, the boiler installation shall comply with the Michigan mechanical  
code, R 408.30901 to R 408.30998, Michigan plumbing code, R 408.30701 to R  
408.30796 and Michigan electrical code, R 408.30801 to R 408.30880.  
History: 1995 AACS; 1998-2000 AACS; 2002 AACS; 2006 AACS; 2009 AACS; 2013 AACS.  
R 408.4028 Manufacturer's data reports; filing.  
Rule 28. A manufacturer's data report for boilers shall be signed by an  
authorized inspector and shall be filed by the manufacturer with the chief inspector  
before installation. A data report that is signed by an authorized inspector and the  
ASME stamp on the boiler denotes that the boiler  
has been constructed in accordance with these rules. If a boiler is of special  
design, blueprints showing details of  
the  
proposed construction shall be  
submitted to the chief inspector and his or her approval shall be secured before  
construction is started.  
History: 1995 AACS; 2006 AACS.  
Editor's note: The R number for this rule has been reassigned. Former R 408.4028 was rescinded  
effective June 3, 1971.  
R 408.4029 Allowable pressure of noncode boilers.  
Rule 29. The maximum allowable pressure of a boiler which does not carry the  
American society of mechanical engineers code symbol may be computed in accordance  
with the requirements of R 408.4212(1).  
Page 8  
History: 1979 AC.  
R 408.4031 Installation and reinstallation of boilers.  
Rule 31. (1) The owner shall ensure that the installation of a new boiler or a reinstalled  
boiler is pursuant to the requirements of these rules, the ASME boiler and pressure vessel  
code, 2010 edition and its 2011a addenda, which is adopted by reference in R 408.4025  
and the NBIC 2011 edition, which is adopted by reference in R 408.4024 and ASME  
CSD-1 2009 which is adopted in R 408.4027.  
Exception: The ASME code requirement for the completion of a P4B data report for the  
installation of mechanically assembled boiler external piping is not required.  
Exception: Witnessing of the pressure test required by the NBIC part 1, section 2,  
paragraph 2.10.2, is not required.  
Exception: For a water tube or coil type boiler requiring forced circulation a  
temperature differential system that senses the water temperature difference (delta T)  
between inlet and outlet across the boiler, and interrupts the fuel to the burner when the  
delta T exceeds the boiler manufacturers’ parameters, shall be accepted when approved  
by the boiler manufacturer. The manufacturer of the boiler shall provide instructions in  
the owner’s manual for the testing, operation, and installation of the temperature  
differential system.  
(2) Where applicable, the boiler installation shall comply with the Michigan mechanical  
code, R 408.30901 to R 408.30998, Michigan plumbing code, R 408.30701 to R  
408.30796 and Michigan electrical code, R 408.30801 to R 408.30880.  
(3) The NBIC code, part 1, section 2, paragraph 2.4.4, is enforced by the Michigan  
plumbing code, R 408.30701 to R 408.30796.  
(4) The NBIC code, part 1, section 3, paragraph 3.6.1, is enforced by the Michigan  
mechanical code, R 408.30901 to R 408.30998.  
History: 1979 AC; 1985 AACS; 1995 AACS; 1998-2000 AACS; 2001 AACS; 2002 AACS; 2006  
AACS; 2009 AACS; 2013 AACS.  
R 408.4032 Non-boiler external piping; power boilers; adoption of standards by  
reference.  
Rule 32. (1) The owner shall ensure that the installation of piping not covered by the  
ASME boiler and pressure vessel code, section I, 2011 edition, and its 2011a addenda is  
installed as prescribed by the ASME code for pressure piping, B31.1, 2010 edition and its  
2011a addenda, adopted by reference in R 408.4025.  
(2) The owner of a chemical plant or petroleum refinery shall comply with subrule (1)  
of this rule or shall ensure the installation is installed as prescribed by the ASME code for  
chemical plants and petroleum refineries, B31.3, 2010 edition and its 2011a addenda.  
(3) A licensee under this rule is not required to possess an ASME code symbol stamp,  
but shall hold a valid installer’s license.  
(4) The owner shall ensure that the installation of all of the following piping is pursuant  
to subrule (1) of this rule:  
(a) Blowoff piping beyond the second valve out to the safe point of discharge.  
Page 9  
(b) Steam piping out to the load.  
(c) Feed-water piping from the pump.  
(d) Condensate piping.  
History: 1995 AACS; 1998-2000 AACS ; 2002 AACS; 2006 AACS; 2009 AACS; 2013 AACS.  
R 408.4033 Permits; documentation for installation, reinstallation, alteration, and  
repair of boilers, boiler external piping, and non-boiler external piping.  
Rule 33. (1) All of the following provisions apply to installation permits:  
(a) A person shall not install, or reinstall, a boiler without holding a proper license and  
first securing a permit from the boiler division of the department. The licensee applying  
for the permit shall ensure that work does not proceed until an approved permit has been  
secured.  
(b) A person shall not install or replace welded pipe without holding a proper license  
and first securing a permit from the boiler division of the department. The licensee  
applying for the permit shall ensure that work does not proceed until an approved permit  
has been secured.  
(c) A person shall not install nonwelded pipe without holding a proper license. A  
permit is not required.  
(2) All of the following provisions apply to repair and alteration permits or reports:  
(a) A person shall not alter or repair a boiler without holding a proper license and first  
securing a permit from the boiler division of the department. The licensee applying for  
the permit shall ensure that work does not proceed until an approved permit has been  
secured, except as provided by section 18 of the act.  
(b) A person shall not repair or replace welded piping without holding a proper license  
and first securing a permit from the boiler division of the department. The licensee  
applying for the permit shall ensure that work does not proceed until an approved permit  
has been secured, except as provided for in section 18 of the act.  
(c) A person shall not replace nonwelded piping without holding a proper license. A  
permit is not required.  
(d) A person shall not perform welded repairs to nonwelded piping without holding a  
proper license and first securing a permit from the boiler division of the department. The  
licensee applying for the permit shall ensure that work does not proceed until an  
approved permit has been secured, except as provided for in section 18 of the act.  
(e) A licensee who makes welded repairs to boilers or boiler external piping requiring  
the use of the national board “R” symbol stamp shall furnish the boiler division of the  
department, with 1 copy of the approved permit application, along with reports as  
required by the NBIC, upon completion of the work.  
(f) A public utility or industrial plant that has been granted an exemption under section  
23 of the act that makes a welded repair to non-boiler external piping shall maintain  
records of the repairs and make the records available for review as required by the board  
of boiler rules.  
(3) A permit is required for either of the following:  
(a) A change in use of an existing boiler from high pressure to low pressure and low  
pressure to high pressure, hot water heat to hot water supply and hot water supply to hot  
water heat, steam heating to hot water heating and hot water heating to steam heating,  
Page 10  
steam heating to hot water supply and hot water supply to steam heating shall comply  
with the requirements of the Michigan boiler code, R 408.4001 to R 408.5609.  
(b) Replacement by mechanical methods, without welding, of sections in sectional  
boilers; heat exchangers; feed water heater or economizer; and tube bundles.  
(4) A licensee replacing boiler components required by these rules to be code symbol  
stamped and national board registered shall provide the boiler division with the  
manufacturer’s data reports.  
(5) Any changes in the scope of work stated on the original permit application shall be  
submitted to the boiler division for approval.  
History: 1979 AC; 1981 AACS; 1995 AACS; 1998-2000 AACS; 2002 AACS; 2006 AACS; 2009  
AACS; 2013 AACS.  
R 408.4034 Public utility or industrial exemption.  
Rule 34. (1) Practices and procedures for the exemption of licensing and permitting as  
referenced in section 23 of the act, MCL 408.773 consist of all of the following:  
(a) The boiler(s), boiler external piping, and non-boiler external piping shall be owned  
and operated by the public utility or industrial facility.  
(b) Have in effect a quality program which shall be in the form of a quality manual.  
(c) The quality program, at a minimum, shall address the required features relative to  
the scope of work to be preformed. The scope of work related to repairs or replacements  
to boiler(s), boiler external piping, non-boiler external piping, and boiler replacements.  
(2) The outline of the quality program shall include the following:  
(a) Title page: name and complete address of the company.  
(b) Contents page: a listing of the contents of the manual by subject.  
(c) Scope of work: clearly indicates the scope of work.  
(d) Statement of authority: a corporate resolution or policy recognizing its obligation  
under the act for compliance at all times and naming the person having responsibility and  
authority for the scope of work.  
(e) Manual control: provisions for revising and issuing those revisions to maintain the  
manual current within the organization.  
(f) Material control: method used to assure that only acceptable materials (including  
welding material) are ordered, verified, and identified in storage.  
(g) Method of performing work: documenting repairs in sufficient detail. Both of the  
following shall be documented:  
(i) When repairs are conducted on boiler(s) or boiler external piping the inspector must  
have prior acceptance of the method of repairs.  
(ii) The quality program shows who is responsible to notify the inspector of any boiler  
or boiler external piping repair work, and keeps him or her apprised of the progress of  
such work.  
(h) Shall describe controls to ensure qualified welding procedures and welders qualified  
to those procedures are used for repairs.  
(i) Nondestructive examination (NDE) and heat treatment: shall describe controls for  
NDE and heat treatment procedures.  
(j) Examinations and tests: what examination and tests are to be conducted upon  
completion of the repair.  
Page 11  
(k) Acceptance and inspection of repairs: the individual responsible for acceptance of  
repairs.  
(l) Inspections: provisions for the inspector to have access to areas where repair work  
is being performed.  
(m) Report of boiler repair: indicate the person responsible for preparing, signing, and  
presenting the record of welded (RWR) form to the inspector and sending it to the boiler  
division.  
(n) Nonconforming items: have a system for the correction of nonconformities.  
(o) Exhibits: forms referenced in the quality manual shall be included.  
(3) The boiler owner shall maintain a maintenance record, subject to audit by state  
inspectors, for each boiler. The maintenance record shall contain an adequate description  
of each abnormal event, modification, repair, hydro test, internal or external inspections,  
and off-normal operations.  
(4) The boiler owner shall contract with an approved third-party inspection and  
insurance company for boiler and boiler external piping repairs.  
(5) All welders working on boilers or piping within the quality program shall be  
employees of the utility or industrial facility.  
(6) All welding, heat treatment, non-destructive examination, and testing procedures  
shall be qualified pursuant to the ASME code.  
(7) The boiler owner shall maintain documentation between each audit of non-boiler  
external piping repairs or replacements.  
(8) Third-party employees or contractors shall not work under the exemption program  
for the applicant related to installation or repairs.  
(9) The boiler division shall be notified prior to any boiler replacements.  
(10) The applicant shall prepare and file with the boiler division an appropriate record  
of a welded repair form, signed by a commissioned inspector, with the boiler division.  
The applicant shall submit to the boiler division the record of welded repair form within  
180 days after the completion of the repair.  
(11) Upon the boiler board approval of the exemption program, a public utility or  
industrial plant shall be granted relief from licensing and permit requirements of the act  
for repairs to boiler and piping and the installation of a direct boiler replacement.  
(12) Failure to comply with any of the provisions of this rule shall constitute just cause  
for revocation of the exemption status.  
(13) The chief of the boiler division shall cause an audit of the exemption program to  
be conducted at least once every 3 years, to ensure continued compliance with the boiler  
act and the board’s requirements and these rules.  
History: 2013 AACS.  
R 408.4035 Permits; issuance to licensed persons only.  
Rule 35. (1) Permits shall be issued only to persons licensed as required by the act and  
these rules. Work shall be performed by or under the supervision of a licensed person.  
(2) Payment of the permit application fee as provided in R 408.4038 is the  
responsibility of the licensed person.  
History: 1979 AC; 1995 AACS; 2013 AACS.  
Page 12  
R 408.4036 Multiple contractors.  
Rule 36. Each contractor performing separate work on the same boiler installation,  
repair, or alteration shall possess a valid boiler installer’s or boiler repairer’s license and  
shall obtain a permit for that part of the work to be performed.  
History: 1979 AC; 2013 AACS.  
R 408.4038 Fees.  
Rule 38. (1) Fees for licenses, examinations, boiler operator and stationary engineer  
registration; permit applications, certificates, and inspections are as follows:  
Licenses  
Installer license  
$80.00.  
Installer exam $100.00.  
Installer renewal  
Repairer license  
$80.00.  
$80.00.  
Repairer exam$100.00.  
Repairer renewal  
Inspector license  
Inspector exam  
Inspector renewal  
$80.00.  
$80.00.  
$100.00.  
$50.00.  
Boiler operator registration $80.00.  
Boiler operator examination $100.00.  
Boiler operator registration renewal $80.00.  
Stationary engineer registration  
$80.00.  
Stationary engineer written examination  
Stationary engineer registration renewal  
$100.00.  
$80.00.  
3rd class stationary engineer oral examination  
2nd class stationary engineer oral examination  
1st class stationary engineer oral examination  
$150.00.  
$200.00.  
$250.00.  
The reprinting of a registration more than 30 days after  
the issuance date $30.00.  
Examination fees are nonrefundable.  
Permit applications  
Nuclear installation permit application  
$1,380.00.  
Nuclear repair permit application  
$400.00.  
Low-pressure installation permit application $75.00.  
High pressure installation permit application  
$120.00 +.05 per foot of piping.  
Repair permit application  
$75.00.  
Permit application fees are nonrefundable.  
Page 13  
Certificates  
Certificates $60.00.  
Reprinting of certificate more than 30 days after the issuance  
date $30.00.  
Inspections  
Power boilers-150 square feet or less $70.00.  
Power boilers-more than 150 square feet to 4,000 square feet  
$165.00.  
Power boilers-more than 4,000 square feet to 10,000 square feet $180.00.  
Power boilers-more than 10,000 square feet $205.00.  
Low-pressure heating boiler without manhole  
$70.00.  
Inspection of an additional low-pressure heating boiler without  
a manhole at the same physical location, on the same date $60.00.  
Low-pressure heating boiler with manhole $85.00.  
Low-pressure hot water supply boiler$60.00.  
Inspection of an additional low-pressure hot water supply boiler  
at the same physical location, on the same date  
Low-pressure process boiler without manhole  
Low-pressure process boiler with manhole $85.00.  
Miniature hobby locomotive boiler $15.00.  
$45.00.  
$70.00.  
Special inspections  
(2) The boiler division shall provide special inspections not otherwise covered in  
subrule (1) of this rule. The charge for this service shall be at the rate of $100.00 for the  
first hour and $100.00 for each additional hour, plus lodging, meals, transportation, and  
other related expenses incurred for performing special inspections.  
(3) Fees required under these rules shall be paid by cash, money order, or check to the  
department. Money orders or checks shall be made payable to: “State of Michigan.”  
History: 1981 AACS; 1991 AACS; 1998-2000 AACS; 2001 AACS; 2002 AACS; 2007 AACS;  
2009 AACS; 2010 AACS; 2013 AACS.  
R 408.4039 Permits to alter boiler, piping, or vessel.  
Rule 39. (1) The boiler division of the department may issue a permit to alter a  
boiler, piping, or vessel subject to these rules only to  
a Michigan-licensed boiler repairer who possesses a valid  
certificate of  
authorization from the national board of boiler and pressure vessel inspectors for  
alterations or the ASME boiler and pressure vessel committee to build the type of  
boiler, piping, or vessel being altered.  
Drawings and calculations covering all details of the proposed alteration shall  
accompany the application for a permit to alter.  
Page 14  
(2) The licensed repairer shall perform the alteration in accordance with the  
NBIC.  
(3) The licensed repairer who makes the alteration shall prepare a report on forms  
prescribed by the boiler division of the department. The licensed repairer shall  
furnish an original and 2 copies of the report to the boiler division of the department,  
and upon request, 1 copy of the report to the boiler owner and user. The report  
shall clearly indicate what changes have been made to the original construction. The  
report shall show, in the spaces provided, the manufacturer's serial number of the boiler,  
the national board number, if assigned, and the Michigan serial number assigned.  
(4) The licensed repairer who makes the alteration shall prepare and attach a  
nameplate that complies with the requirements of the NBIC.  
History: 1979 AC; 1981 AACS; 1995 AACS; 1998-2000 AACS; 2006 AACS.  
R 408.4045 Registration of boilers.  
Rule 45. (1) Within 6 months from the effective date of these rules, all owners  
or users of boilers and their installations now in use or installed ready for use in the  
state shall report to the chief inspector on forms prescribed by the department, giving  
the location, type, capacity, age, and date of installation.  
(2) Before transfer of ownership of a boiler is complete, the current owner shall  
assure all invoices for inspection  
certificates  
and inspections for services  
rendered under his or her ownership are paid in full. Upon completion of transfer  
of ownership, the new owner of a boiler shall notify the boiler division of the  
department of change in ownership of a boiler or change in ownership of a location  
where a boiler is installed. Upon written notification, a new certificate of inspection  
shall be issued in the name of the new owner.  
(3) A boiler owner or user shall notify the boiler division of the department  
immediately when his or her boiler insurance has been discontinued.  
History: 1979 AC; 2006 AACS.  
R 408.4047 Exempt boilers.  
Rule 47. These rules do not apply to any of the following:  
(a) A boiler under federal control.  
(b) A swimming pool heater, open car wash heater, and similar types of equipment  
which do not have intervening valves on the return or discharge piping, which do not  
have a reduction in pipe size in the return or discharge piping, and which do not generate  
more than normal circulating pump pressure.  
(c) A miniature steam or marine engine used for a hobby.  
(d) A boiler used in the power plant of a self-propelled vehicle designed primarily for  
transportation of persons or property on a highway, except for a vehicle used exclusively  
on stationary rails or tracks.  
(e) A boiler used on a mint farm for mint processing purposes.  
(f) A nonvaporizing, organic fluid boiler if the boiler meets all of the following criteria:  
Page 15  
(i) The system is vented and does not have valves or restrictions in the pipe between the  
boiler and the vent.  
(ii) The vent pipe is sized so that the thermal expansion of the fluid will not result in an  
increase in pressure on the system, which is verifiable with engineering data.  
(iii) The owner or user provides the boiler division of the department with calculations  
performed by an engineer, which verify that pressure due to thermal expansion cannot  
exist in the boiler as installed.  
(g) A low-pressure steam boiler that has a volume of less than 5 cubic feet and that does  
not have piped feed connections.  
History: 1979 AC; 1998-2000 AACS; 2006 AACS; 2009 AACS; 2013 AACS.  
R 408.4049 Boilers subject to inspection.  
Rule 49. Each boiler used or proposed to be used within this state shall be  
thoroughly inspected as to its construction, installation, and condition.  
History: 1979 AC; 1981 AACS.  
R 408.4051 Inspection of certain boilers required.  
Rule 51. Upon completion of the installation, all boilers shall be inspected by  
the chief inspector or a deputy inspector.  
History: 1979 AC; 1981 AACS.  
R 408.4052 Rescinded.  
History: 1979 AC; 1995 AACS; 2002 AACS.  
R 408.4055 Right of access.  
Rule 55. The director, chief inspector, deputy inspector, or any special inspector shall  
have free access, during reasonable hours, to any premises in the state where a boiler is  
being constructed, installed, repaired, operated, or connected and ready for use for the  
purpose of ascertaining whether the boiler is in compliance with the act.  
History: 1979 AC; 1998-2000; 2013 AACS.  
R 408.4057 Boiler inspection.  
Rule 57. (1) Once a boiler has been inspected by the chief or deputy inspector and the  
boiler and its installation approved, all certificate inspections shall be conducted pursuant  
to the NBIC and these rules by an inspector who is properly licensed to inspect boilers in  
this state pursuant to all the following provisions:  
(a) A power boiler, process boiler, or high-pressure, high-temperature water boiler shall  
receive a certificate inspection annually and shall also be externally inspected annually,  
while under pressure, within 6 months from the date of the internal inspection.  
Page 16  
(b) A low-pressure steam or vapor heating boiler shall receive a certificate inspection  
biennially.  
(c) Hot water heating and hot water supply boilers shall receive a certificate inspection  
triennially, with an internal inspection at the discretion of the inspector.  
(d) A nonvaporizing, organic fluid boiler that is not exempt under these rules shall  
receive an external certificate inspection triennially.  
(e) A miniature hobby locomotive boiler shall receive a certificate inspection annually.  
(f) A grace period of 2 months beyond the periods specified in subdivisions (a) to (e) of  
this subrule may lapse between certificate inspections, and the board may permit longer  
periods between certificate inspections.  
(g) Internal inspection of cast boilers shall be at the discretion of the inspector.  
(2) The certificate inspection shall be an internal inspection if construction allows,  
otherwise the certificate inspection shall be as complete an inspection as possible unless  
specified otherwise under this rule.  
(3) The chief inspector, deputy inspector, or a special inspector provided for in the act  
shall make the inspections specified in this rule.  
(4) If, at the discretion of the inspector, a hydrostatic test is necessary, the boiler owner  
or user shall ensure that the test is performed in the presence of the inspector.  
(5) Certificate inspection reports submitted by electronic interface shall be in a format  
acceptable to the boiler division.  
(6) Certificate inspection reports submitted to the boiler division for data entry shall be  
assessed a fee of $2.00 per report.  
History: 1979 AC; 1981 AACS; 1985 AACS; 1995 AACS; 1998-2000 AACS; 2002 AACS; 2006  
AACS; 2009 AACS; 2013 AACS.  
R 408.4058 Extension of internal inspection certificate to 24 or 36 months.  
Rule 58. (1) An internal boiler inspection may be increased from an annual inspection  
to a 24-month inspection frequency by approval of the board of boiler rules. An  
employee delegated by the utility or industrial facility shall apply for the extension and  
submit a copy of the document that controls its program for approval by the board of  
boiler rules. The information shall be addressed by plant orders, procedures, or policies.  
The following information may be contained in 1 document or several documents if 1  
document contains references to all other documents addressing the required information:  
(i) Operator training.  
(ii) Boiler maintenance.  
(iii) Water chemistry.  
(iv) Operating parameters.  
(v) Chemical cleaning schedule.  
(vi) Protective devices.  
(vii) Boiler external inspection.  
(viii) Testing of pressure relief devices pursuant to the NBIC. Repairs shall be  
conducted by the valve manufacturer or a “VR” stamp holder.  
(2) The plant owner shall establish a review committee. The inspector shall be a  
member of the committee. The purpose of the committee is to determine the  
acceptability of a boiler to operate safely for a 24-month period. The committee shall  
have access to and review all information pertaining to the past operation, maintenance,  
Page 17  
and repair of the boiler. The review committee meeting shall be conducted within 30  
days after the internal inspection. The committee may decrease the period of time the  
boiler may operate, but shall not extend the period beyond 24 months. The signed  
summary report of the review committee meeting shall be submitted to the boiler division  
of the department. The grace period provided under R 408.4057 does not apply to this  
rule. The inspector shall indicate the next inspection due date on his or her inspection  
report to the boiler division of the department.  
(3) An internal boiler inspection may be increased from a 24-month inspection to a 36-  
month inspection frequency by approval of the board of boiler rules. An employee  
designated by the utility or industrial facility shall request in writing the extension and  
shall submit a copy of the document that controls its program with supporting  
documentation that demonstrates compliance with all of the following for approval by the  
board of boiler rules:  
(a) The boiler complies with all of the requirements of subrule (1) of this rule, and is  
currently inspected under 24-month inspection frequency approved by the board of boiler  
rules.  
(b) The boiler is a power boiler.  
(c) The following information shall be addressed by the program document, plant  
orders, plant procedures, or plant policies:  
(i) The boiler is fully attended during operations by qualified personnel designated by  
the owner to operate the boiler.  
(ii) The owner has a designated organization that provides oversight to boiler  
maintenance, and monitors boiler conditions to prevent significant deterioration from  
scaling, corrosion, erosion, or overheating to boiler components. The program document  
shall contain an organizational chart that delineates the reporting structure of this  
organization along with the organization responsible for boiler operation and  
maintenance within the owner’s organization.  
(iii) The owner has installed instrumentation available and functioning for continuous  
monitoring of water chemistry parameters as identified by the boiler manufacturer and  
routine calibration is performed. This instrumentation shall be maintained on a list for  
each boiler that applies to this paragraph.  
(iv) The owner has a program for routine monitoring of the water chemistry condition,  
which includes physical samples being analyzed by the owner’s staff. The owner shall  
maintain a list of the physical samples for each boiler that applies to this paragraph.  
(v) The owner has alarm response procedures that provide direction to operators for  
actions to correct variations to chemistry parameters that include removing the boiler  
from service.  
(d) The establishment of a review committee whose purpose is to determine the  
acceptability of a boiler to operate safely for a 36-month period. The review committee  
shall be made of, at a minimum, the following members:  
(i) A representative from the owner’s boiler operating and maintenance organization.  
(ii) A representative from the owner’s organization designated to provide oversight to  
boiler maintenance and monitoring of boiler condition.  
(iii) The inspector.  
(e) The review committee shall have access to and review all information pertaining to  
the past operation, maintenance, and repair of the boiler.  
Page 18  
(f) The review committee meeting shall be conducted within 30 days after the internal  
inspection. The review committee may shorten the period of time the boiler may operate,  
but shall not extend the period beyond that permitted by the board of boiler rules.  
(g) The summary report of the review committee meeting shall be submitted to the  
boiler division of the department.  
(h) The grace period provided under R 408.4057(1)(f) shall not apply to this rule. The  
inspector shall indicate the next inspection due date on the inspection report submitted to  
the boiler division of the department.  
(3) Utilities or industrial facilities with a prescheduled boiler internal certificate  
inspection period shall communicate with the boiler division the date when the boiler is  
removed from service. The boiler internal inspection may occur at any time during the  
outage period. The next operating period shall be calculated based on the date of the  
certificate inspection conducted during this period.  
(4) An external inspection of the boiler shall be conducted while under pressure, within  
12 months of the certificate inspection, and every 12 months thereafter until the next  
boiler internal inspection.  
History: 1979 AC; 2002 AACS; 2006 AACS; 2009 AACS; 2013 AACS.  
R 408.4059 Notification for inspection.  
Rule 59. The owner or user shall prepare each boiler for internal inspection in  
accordance with the NBIC and these rules and shall prepare for and apply a hydrostatic  
pressure test, whenever necessary, on the date specified by the chief inspector,  
deputy inspector, or special inspector.  
History: 2002 AACS; 2006 AACS.  
R 408.4065 Examinations for inspector licenses.  
Rule 65. (1) Examinations for boiler inspector licenses and certificates of competency  
shall be held at a location selected by the board.  
(2) Examinations shall be conducted as approved by the board.  
History: 1979 AC; 2006 AACS; 2013 AACS.  
R 408.4067 Qualifications of applicants for a boiler inspector license.  
Rule 67. An applicant for examination for a boiler inspector license shall have had not  
less than 3 years’ practical experience in the design, construction, or operation of high  
pressure boilers, as mechanical engineer, steam engineer, or boilermaker or shall have  
had not less than 3 years’ inspection experience as an inspector of high pressure boilers.  
A credit of 2 years of the required experience shall be given to applicants holding a  
degree in engineering, mathematics, or science from an accredited college or university.  
History: 1979 AC; 2013 AACS.  
Page 19  
R 408.4069 Examination; contents of applications.  
Rule 69. Application for an examination for a certificate of competency shall be in  
writing upon a form to be furnished by the department stating the education of the  
applicant, a list of employers, period of employment, and position held with each  
employer. An application containing a willful falsification or untruthful statement shall  
be rejected.  
History: 1979 AC; 2013 AACS.  
R 408.4071 Examination; contents.  
Rule 71. If an examination applicant's history and experience  
meet  
the  
requirements of R 408.4067, the applicant shall be given a written examination  
dealing with the design, construction, installation, and repair of boilers and their  
appurtenances. The applicant shall be accepted or rejected on the merits of the  
examination. If the applicant is successful in meeting the requirements of the  
board,  
a
license and certificate of competency will be issued by the director. An  
applicant who fails to pass the examination may appeal to the board for another  
examination, which shall be given by the board within 90 days. The record of the  
applicant's examination shall be accessible to the applicant and his or her employer.  
History: 1979 AC; 1995 AACS.  
R 408.4073 Examination fee for boiler inspector's license.  
Rule 73. A fee prescribed by R 408.4038 shall be charged for each applicant  
taking the examination for boiler inspector's license and shall accompany the  
application filed with the department. The fee entitles the applicant to take the  
examination twice if necessary. An additional fee prescribed by R 408.4038 shall  
accompany each subsequent application.  
History: 1979 AC; 1981 AACS; 2002 AACS; 2006 AACS.  
R 408.4075 Special inspector's license.  
Rule 75. The director, upon the request of a company authorized to insure  
against loss from accident of boilers in this state or a city that has an authorized boiler  
inspection department, shall issue, to an inspector of the company or the city, a  
license as a special inspector if the inspector, before receiving his or her license,  
satisfactorily passes the examination provided for in R 408.4071 or, in place of  
the examination, holds a license or a certificate of competency as an inspector of  
boilers for a state that has a standard of examination substantially equal to that of  
this state or holds a commission as an inspector of boilers issued by the national  
board of boiler and pressure vessel inspectors. Each inspector shall present himself or  
herself for a review of Michigan boiler law and rules conducted by the chief  
inspector before a license is issued.  
Page 20  
History: 1979 AC; 1995 AACS.  
R 408.4077 Rescinded.  
History: 1979 AC; 1981 AACS; 2002 AACS.  
R 408.4079 Annual renewal of license.  
Rule 79. Each license issued to a special inspector shall be renewed at the  
beginning of each calendar year following the date of issuance, and shall be  
accompanied by a fee as prescribed by R 408.4038.  
History: 1979 AC; 1981 AACS.  
R 408.4081 Special inspector employed by insurance company.  
Rule 81. A special inspector's license issued to an inspector in the employ of an  
insurance company shall be held at the office of the employing company. The  
license and the identification card shall be returned to the chief inspector when the  
special inspector to whom the license and identification card were issued is no longer  
in the company's employ or at the request of the chief inspector, as specified by  
section 14 of the act.  
History: 1979 AC; 1995 AACS.  
R 408.4087 Reporting unregistered boilers.  
Rule 87. (1) If a special inspector visits a location to conduct an inspection as required  
by these rules, then he or she shall report the location of all boilers that are not registered.  
The reporting shall be in addition to the reporting pertaining to the inspection of  
registered boilers and their installation. The chief inspector shall assign a deputy  
inspector to visit the location to inspect all unregistered boilers and affix a Michigan  
serial number.  
(2) If an inspector makes an inspection of a boiler that does not bear a Michigan serial  
number, then the inspector shall attempt to verify whether the boiler is unregistered or is  
missing the serial number tag. If the inspector is unable to determine that the boiler is  
registered, then he or she shall report it as prescribed in subrule (1) of this rule.  
History: 1979 AC; 1995 AACS; 2002 AACS; 2009 AACS; 2013 AACS.  
R 408.4089 Boiler installers' licenses.  
Rule 89. Boiler installers shall be licensed as required by section 13 of the act.  
History: 1979 AC.  
Page 21  
R 408.4091 Application for boiler installer's license.  
Rule 91. (1) An application for a boiler installer's license shall be on a form  
provided by the boiler division of the department. The applicant shall state the name  
of the business, firm, partnership, or  
corporation that the applicant intends to  
represent in the business of installing boilers and shall provide evidence of his or her  
past experience in the installation of boilers and evidence of his or her  
workmanship and engineering skills that would qualify the applicant for examination  
and licensing.  
(2) An applicant for a boiler installer's license shall have not less than 5 years of  
experience in all phases of boiler installation in the class of license for which the  
applicant is applying. A credit of 2 years of experience towards the 5 years of  
experience may be given for 2 years of experience in the design, construction,  
manufacture, or inspection of boilers.  
(3) The boiler division of the department may verify installations required to  
be reported on the application to establish the applicant's  
minimum practical installation experience in the applicant's desired  
license classification.  
History: 1979 AC; 1981 AACS; 1995 AACS; 2002 AACS; 2006 AACS.  
R 408.4093 Rescinded.  
History: 1979 AC; 1995 AACS; 2002 AACS.  
R 408.4096 Filing of welding procedures.  
Rule 96. (1) If welding is employed in the installation or reinstallation of  
a boiler or piping, then the licensed installer shall  
file welding procedure specifications and the procedure qualification reports  
qualified in accordance with the requirements of ASME code section IX, welding and  
brazing qualifications, with the boiler division of the department, before conducting  
any installation requiring welding.  
(2) A licensed installer who utilizes welding in the installation or reinstallation  
of boilers or piping shall have available, for the inspector's review, welding  
procedure specifications and welder performance qualification records to be used or that  
were used in the installation or reinstallation.  
History: 1998-2000 AACS; 2006 AACS.  
R 408.4099 Identification of applicant's business affiliation for installer's  
license.  
Rule 99. (1) An applicant for a boiler installer's license shall state the name of the  
business, firm, partnership, or corporation under which he or she intends to carry on the  
Page 22  
business of installing boilers before a license will be issued. The applicant may be the  
owner, a partner, an officer of a corporation, or a supervisory employee of the business,  
firm, partnership, or corporation legally registered with the state.  
(2) A person shall not engage in installing boilers under the name of more than 1  
business at any one time.  
(3) When required by the ASME code, a licensee shall be in the employ of an  
organization in possession of the appropriate certificate of authorization.  
History: 1979 AC; 1995 AACS; 2002 AACS.  
R 408.4101 Installer's license not required.  
Rule 101. An individual employed by, and working under the supervision of, a  
licensed boiler installer is not required to be licensed.  
History: 1979 AC; 2002 AACS.  
R 408.4103 Examination for boiler installer's license.  
Rule 103. (1) An applicant for a boiler installer's license shall be required to  
take an examination approved by the board of boiler rules. The examination will be  
held quarterly at a location determined by the boiler division of the department. A  
score of 70% is required to pass the examination. A passing score on the  
examination is valid for 3 years. If a license is not applied for in that time, then an  
applicant shall file a new application for examination.  
(2) A licensee wishing to upgrade his or her license to a higher classification  
shall maintain his or her current license in good standing for a minimum of 1 year and  
take the examination prescribed in subrule (1) of this rule. A licensee may only  
upgrade a license 1 classification at a time.  
History: 1979 AC; 1995 AACS; 2002 AACS; 2006 AACS.  
R 408.4105 Fee for boiler installer's license.  
Rule 105. The fee prescribed by R 408.4038 shall accompany  
application for a boiler installer's license.  
the  
History: 1979 AC; 1981 AACS.  
R 408.4107 Annual renewal of boiler installer’s license; change of business  
affiliation.  
Rule 107. (1) A boiler installer’s license shall be renewed annually upon payment of a  
fee as prescribed by R 408.4038.  
(2) An installer’s license shall expire on December 31 of each year and shall be  
renewed. An application for renewal shall be submitted to the boiler division of the  
department between September 30 and December 31. A license that is not renewed by  
Page 23  
January 1 shall be voided and may be reinstated only upon application for reinstatement  
and payment of both the renewal fee and a reinstatement fee of $80.00. A person  
requesting renewal of a license within 3 years after the license is voided pursuant to this  
subrule is not subject to reexamination for the license, but shall pay both the  
reinstatement fee and the annual license renewal fee for the current renewal year. A  
person who fails to renew a license for 3 consecutive years shall meet the requirements  
of, and take an examination for, the class of license sought.  
(3) A licensee who changes business affiliation shall notify the chief inspector, on a  
form provided by the boiler division of the department, of the name and address of the  
new business affiliate under which the licensee intends to use his or her license. A fee of  
$30.00 shall accompany the notification form.  
History: 1979 AC; 1981 AACS; 1995 AACS; 2002 AACS; 2006 AACS; 2007 AACS; 2013 AACS.  
R 408.4109 Classes of boiler installer's licenses.  
Rule 109. (1) A class 1B installer's license qualifies a person to install a low-  
pressure boiler that does not exceed a firing rate of 1,000,000 BTU per hour as certified  
by the boiler manufacturer. For a class 1B license, the sum of all modules in a  
modular boiler shall not exceed a firing rate of 1,000,000 BTU per hour as certified by  
the boiler manufacturer.  
(2) A class 2B installer's license qualifies a person to do all of the following:  
(a) Install a low-pressure boiler of any capacity or firing rate.  
(b) To perform work covered by a class 1B license.  
(3) A class 3B installer's license qualifies a person to do all of the following:  
(a) Install a power boiler that has a capacity of not more than 5,000 pounds of  
steam per hour.  
(b) Install or replace non-boiler external piping as defined by ASME code B31.1  
and R 408.4032.  
(c) Perform work covered by a class 2B license.  
(4) A class 4B installer's license qualifies a person to do all of the following:  
(a) Install a boiler that has a capacity of not more than 300,000 pounds of steam  
per hour.  
(b) Install or replace non-boiler external piping as defined by ASME code B31.1  
and R 408.4032.  
(c) Perform work covered by a class 3B license.  
(5) A class 5B installer's license qualifies a person to do all of the following:  
(a) Install a boiler of any capacity or firing rate. Exception: a nuclear heat  
source boiler.  
(b) Install or replace non-boiler external piping as defined by ASME code B31.1  
and R 408.4032.  
(c) Perform work covered by a class 4B license.  
(6) A class 6B installer's license qualifies a person to install a boiler that utilizes a  
nuclear heat source or its parts, appurtenances, or system components. Before a license  
is issued, an applicant for a class 6B license shall submit evidence of both of the  
following:  
Page 24  
(a) Familiarity with and knowledge of all federal rules and regulations regarding  
the installation of a boiler that has a nuclear heat source.  
(b) Employment by a company in possession of a valid ASME nuclear code  
symbol applicable to the portions of any nuclear boiler system that the company  
proposes to install.  
(7) A class P license qualifies a person to install or replace non-boiler external  
piping or repair non-boiler external piping as defined by ASME code B31.1 and R  
408.4032.  
History: 1979 AC; 1995 AACS; 1998-2000 AACS; 2002 AACS; 2009 AACS.  
R 408.4111 Boiler installer’s installation responsibility.  
Rule 111. All boiler installations shall be made pursuant to the American society of  
mechanical engineers boiler code, and pursuant to R 408.4025 and R 408.4027. Any  
deviation from these requirements shall be considered incompetence on behalf of the  
licensee and is cause for suspension or revocation of the boiler installer's license.  
History: 1979 AC; 2002 AACS; 2013 AACS.  
R 408.4114 Inspection of components and systems in a nuclear power plant.  
Rule 114. (1) Preservice (baseline) inspection, in-service inspection, repair,  
replacement, modification, alteration, examination, testing, records, and reports of  
individual nuclear components, parts, appurtenances, piping, supports, nuclear systems,  
applicable associated auxiliary systems, and complete nuclear power plants that are in  
compliance with all of the requirements of the construction code, at the point in time the  
requirements have been completed, irrespective of the physical location, shall be as  
prescribed in section XI, rules for in-service inspection of nuclear power plant  
components, of the ASME boiler and pressure vessel code. A copy of the current edition  
of section XI-2010 and its 2011a addenda, is available for inspection at the Michigan  
Department of Licensing and Regulatory Affairs, Bureau of Construction Codes, 2501  
Woodlake Circle, Okemos, Michigan 48864 or from the ASME International, 22 Law  
Drive, Fairfield, New Jersey 07007, at a cost as of the time of adoption of these  
amendatory rules of $700.00.  
(2) The owner of a nuclear power plant shall file inspection plans and schedules, pump  
and valve testing programs, and requests for relief from section XI of the ASME code  
requirements with the boiler division of the department.  
(3) The nuclear power plant shall maintain compliance with requirements, as prescribed  
by the nuclear regulatory commission.  
History: 1979 AC; 1985 AACS; 1995 AACS; 1998-2000 AACS; 2006 AACS; 2009 AACS; 2013  
AACS.  
R 408.4115 Rescinded.  
Page 25  
History: 1979 AC; 2002 AACS.  
R 408.4116 Rescinded.  
History: 1979 AC; 1981 AACS; 2002 AACS.  
R 408.4117 Boiler repairers; licenses.  
Rule 117. Boiler repairers shall be licensed as required by section 13 of the act.  
History: 1979 AC.  
R 408.4119 Application for boiler repairer's licenses.  
Rule 119. (1) An application for a boiler repairer's license shall be on a form  
provided by the boiler division of the department. The applicant shall state the name  
of the business, firm, partnership, or  
corporation that the applicant intends to  
represent in the business of repairing boilers and shall give evidence of his or her past  
experience in the repair of boilers and evidence of his or her workmanship and  
engineering skills that would qualify the applicant for examination and licensing.  
(2) An applicant for a boiler repairer's license shall have at least 5 years of  
experience in all phases of boiler repair in the class of license for which the  
applicant is applying. A credit of 3 years of experience towards the 5 years of  
experience will be given for 3 years of experience in the design, construction,  
manufacture, or inspection of boilers.  
(3) The boiler division of the department may verify repairs required to be  
reported on the application to establish the applicant's minimum practical repair  
experience in the applicant's desired license classification. Copies of the boiler  
division inspection reports of the repairs shall be made part of the application.  
History: 1979 AC; 1981 AACS; 1995 AACS; 2002 AACS; 2006 AACS.  
R 408.4120 Filing of welding procedures.  
Rule 120. (1) If welding is employed in the repair, replacement, or alteration  
of a boiler or piping, then the licensed repairer  
shall file welding procedure  
specifications and procedure qualification reports qualified in accordance with  
ASME code section IX, welding and brazing qualifications, with the boiler division  
of the department, before conducting any welding.  
(2) A licensed repairer who utilizes welding in the repair, replacement, or  
alteration of boilers or piping shall have available, for the inspector's review,  
welding procedure specifications and welder performance qualification records at the  
work site or other mutually agreed upon location.  
History: 2006 AACS.  
Page 26  
R 408.4121  
Examination for boiler repairer's license; establishment;  
administration; nuclear repairer license applicant; certificate of authorization;  
examination.  
Rule 121. (1) The examination shall be held quarterly at a location determined  
by the boiler division of the department.  
(2) An applicant wishing to upgrade his or her license to a higher classification  
shall take the examination prescribed in subrule (1) of this rule.  
(3) The director, upon the request of a company in possession of a valid ASME  
"N" type certificate of authorization or the national board of boiler and pressure vessel  
inspectors "NR" certificate of authorization, shall issue, to an individual of the  
company, a license as a nuclear repairer if the individual, before receiving his or her  
license, satisfactorily passes the examination prescribed in subrule (1) of this rule.  
History: 1979 AC; 1985 AACS; 1995 AACS; 2002 AACS; 2006 AACS; 2009 AACS.  
R 408.4122  
license.  
Identification of applicant's business affiliation for repairer's  
Rule 122. (1) An applicant for a boiler repairer's license shall state the name of  
the business, firm, partnership, or corporation under which he or she intends to carry on  
the business of repairing boilers before a license will be issued. The applicant may be  
the owner, a partner, an officer of a corporation, or a supervisory employee of the  
business, firm, partnership, or corporation legally registered with the state.  
(2) A person shall not engage in repairing boilers under the name of more than 1  
business at any one time.  
History: 2002 AACS.  
R 408.4123 Boiler repairer's license application fee.  
Rule 123. The fee prescribed by R 408.4038 shall accompany each  
application for boiler repairer's license.  
History: 1979 AC; 1981 AACS.  
R 408.4124 Repairer's license not required.  
Rule 124. An individual employed by, and working under the supervision of, a  
licensed boiler repairer is not required to be licensed.  
History: 2002 AACS.  
R 408.4125 Annual renewal of boiler repairer’s license; change of business  
affiliation.  
Rule 125. (1) A boiler repairer’s license shall be renewed annually upon payment of a  
fee as prescribed by R 408.4038.  
Page 27  
(2) A repairer’s license shall expire on December 31 of each year and shall be renewed.  
An application for renewal shall be submitted to the boiler division of the department  
between September 30 and December 31. A license that is not renewed by January 1  
shall be voided and may be reinstated only upon application for reinstatement and  
payment of both the renewal fee and a reinstatement fee of $80.00. A person requesting  
renewal of a license within 3 years after the license is voided pursuant to this subrule is  
not subject to reexamination for the license, but shall pay both the reinstatement fee and  
the annual license renewal fee for the current renewal year. A person who fails to renew  
a license for 3 consecutive years shall meet the requirements of, and take an examination  
for, the class of license sought.  
(3) A licensee who changes business affiliation shall notify the chief inspector, on a  
form provided by the boiler division of the department, of the name and address of the  
new business affiliate under which the licensee intends to use his or her license. A fee of  
$30.00 shall accompany the notification form.  
History: 1979 AC; 1981 AACS; 1995 AACS; 2002 AACS; 2006 AACS; 2007 AACS; 2013 AACS.  
R 408.4127 Boiler repairers; classes of licenses.  
Rule 127. (1) A class I license allows a licensee to repair a boiler by means other  
than welding, riveting, or other fabrication process.  
(2) A class II license allows a licensee to do both of the following:  
(a) Repair a low-pressure boiler, a hot water supply boiler, and a fire tube boiler  
of any pressure.  
(b) Perform work covered by a class I license.  
(3) A class III license allows a licensee to do all of the following:  
(a) Repair a high-pressure boiler.  
(b) Repair or replace non-boiler external piping, as defined by ASME code B31.1  
and R 408.4032.  
(c) Perform work covered by a class II license.  
(4) A class IV license allows a licensee to do all of the following:  
(a) Repair or field-erect a boiler of any pressure. Exception: a boiler that has a  
nuclear heat source.  
(b) Repair or replace non-boiler external piping as defined by ASME code B31.1  
and R 408.4032.  
(5) A class V license allows a licensee to erect and repair a boiler that has a nuclear  
heat source or its parts, appurtenances, or system components, and also provides the  
following:  
(a) The licensee may repair or replace non-boiler external piping, as defined by  
ASME code B31.1 and R 408.4032.  
(b) Before a license is issued, an applicant for a class V license shall submit  
evidence of the following:  
(i) Familiarity with and knowledge of all federal rules and regulations regarding  
the construction of a boiler that has a nuclear heat source.  
(ii) Employment by a company in possession of a valid ASME N-type symbol  
stamp applicable to the portions of any nuclear boiler system he or she proposes to  
repair.  
Page 28  
(6) A class P license qualifies a person to install or repair non-boiler external  
piping as defined by ASME code B31.1 and R 408.4032.  
(7) A licensed boiler repairer shall secure a permit for a change in use of an  
existing boiler or replacement by mechanical methods, without welding, of sections in  
sectional boilers, heat exchangers, feed water heater or economizer, and tube bundles  
in accordance with R 408.4033.  
History: 1979 AC; 1995 AACS; 1998-2000 AACS; 2006 AACS; 2009 AACS.  
R 408.4129 Boiler repairer’s repair responsibility.  
Rule 129. It is the responsibility of a licensed boiler repairer to make all boiler repairs  
pursuant to R 408.4024 and arrange for the required inspections with an inspector before  
work is started.  
Any deviation from these requirements shall be considered  
incompetence on behalf of the licensee and is cause for suspension or revocation of the  
boiler repairer's license.  
History: 1979 AC; 1995 AACS; 2002 AACS; 2013 AACS.  
R 408.4131 Examination of persons with revoked licenses.  
Rule 131. The board shall require examination or reexamination of any licensee  
whose license has been revoked for cause.  
History: 1979 AC.  
R 408.4133 Reports of inspection to be filed.  
Rule 133. (1) Each company employing licensed boiler inspectors, within 30 days  
following each boiler certificate inspection made by the inspectors, shall file a report of  
the inspection with the chief inspector upon appropriate forms provided by the boiler  
division.  
(2) Certificate inspection reports submitted by electronic interface shall be in a format  
acceptable to the boiler division of the department.  
(3) Certificate inspection reports submitted to the boiler division of the department for  
data entry shall be assessed a fee of $2.00 per report.  
(4) Reporting of non-certificate external inspections shall not be required except when  
such inspections disclose the boiler is in a condition where a violation is issued pursuant  
to R 408.4149.  
(5) The inspector shall leave a signed and dated inspection sticker or inspection report  
at the inspection location.  
(6) The inspector shall record his or her national board of boiler and pressure vessel  
commission number on the inspection report.  
History: 1979 AC; 2002 AACS; 2006 AACS; 2013 AACS.  
R 408.4139 Rental boilers.  
Page 29  
Rule 139. A rental boiler shall be inspected before it is rented and the boiler  
shall be approved for temporary installation.  
approved rental boiler is valid for 12 months.  
An inspection certificate for an  
A licensed boiler installer shall secure an installation permit in accordance  
with R 408.4033 each time a rental boiler is reinstalled. The permit application for an  
installed rental boiler shall be posted at the rental boiler.  
History: 1979 AC; 1995 AACS; 2006 AACS.  
R 408.4143 Refusal of inspection or nonpayment of fee.  
Rule 143. If the owner or user of a boiler required to be inspected refuses to  
allow an inspection to be made or refuses to pay the fee prescribed by R 408.4038,  
the certificate of inspection shall be suspended by the chief inspector until the owner or  
user allows the inspection or pays the fee.  
History: 1979 AC; 1981 AACS.  
R 408.4149 Notice of violation.  
Rule 149. (1) A written notice of violation containing the code deficiencies shall be  
sent to, or served upon, the owner or user by the chief inspector, deputy inspector, or  
special inspector advising of the existing conditions and stating a compliance date when  
the violation shall be corrected. If the code deficiencies are not corrected by the  
compliance date, the violation notice shall serve as a suspension of the certificate. (2)  
When the notice of violation is issued as a certificate blocking, the inspection certificate  
shall be suspended and a written notice shall be given to the owner or user at the time of  
the violation issuance. The certificate blocking violation shall continue in effect until the  
boiler has been made to conform to these rules and until the certificate has been  
reinstated.  
(3) A fee shall be charged pursuant to R 408.4038 (2) for all follow-up visits by the  
chief inspector or deputy inspector.  
History: 1979 AC; 1995 AACS; 2002 AACS; 2013 AACS.  
R 408.4151 Defacing or removing certificate or numbers.  
Rule 151. No person except the chief inspector or  
a
deputy inspector shall  
deface or remove any certificate of inspection or mark of identification number  
on a boiler.  
History: 1979 AC.  
R 408.4153 Operation of boiler under pressure without valid certificate prohibited;  
penalty.  
Page 30  
Rule 153. (1) An owner or user shall not operate a boiler under pressure in this state to  
which these rules apply without a valid inspection certificate.  
(2) An owner or user who causes a boiler to be operated at a pressure exceeding  
maximum operating pressure that is specified on the inspection certificate is subject to  
the penalty prescribed in section 24 of the act.  
(3) When 2 or more boilers of different maximum allowable working pressure are  
connected to a common system, the maximum operating pressure of each boiler shall be  
that of the lesser boiler or boiler’s maximum allowable operating pressure.  
History: 1979 AC; 2002 AACS; 2013 AACS.  
R 408.4155 Boiler policies; newly written, canceled, or suspended.  
Rule 155. All insurance companies shall notify the chief inspector within 30  
days of all boilers newly insured, canceled, not renewed, or suspended because of  
unsafe conditions.  
History: 1979 AC.  
R 408.4157 Notification; defective boilers.  
Rule 157. If a special inspector, upon the first inspection of a new risk, finds that the  
boiler or any of the appurtenances are in such condition that the company refuses  
insurance, the company shall immediately notify the chief inspector and submit a notice  
of violation of the defects.  
History: 1979 AC; 2013 AACS.  
R 408.4161 Defective conditions; external inspections.  
Rule 161. If, upon an external inspection, there is evidence of a leak or crack,  
enough of the covering of the boiler shall be removed to satisfy the inspector in order  
that he may determine the safety of the boiler; or if the covering cannot be removed at  
that time, he may order the operation of the boiler stopped until such time as the  
covering can be removed and proper examination made.  
History: 1979 AC.  
R 408.4163 Notification in case of accident that renders boiler inoperative.  
Rule 163. (1) If an accident occurs that renders a boiler inoperative, then the  
owner or user shall immediately notify the chief inspector.  
For a serious accident, notice shall be given immediately by the quickest method  
available, and neither the boiler nor any of its parts shall be removed or disturbed  
before an inspection has been made by the chief inspector, deputy inspector, or  
special inspector, unless the removal is to save human life. A condition or failure which  
results in bodily injury or physical damage to equipment or property other than the  
Page 31  
boiler or which creates a unique or unusual explosion hazard shall be reported as  
a serious accident.  
(2) A detailed accident report shall be submitted by the owner's  
or user's  
insurance company boiler inspector on an accident report form furnished by the  
boiler division of the department. If a boiler is not insured, a state deputy boiler  
inspector shall submit the required report.  
History: 1979 AC; 1995 AACS; 2002 AACS; 2006 AACS.  
R 408.4165 Restamping of boilers.  
Rule 165. When the stamping on a boiler becomes indistinct, the inspector  
shall instruct the owner or user to have it restamped. Request for permission to  
restamp the boiler shall be made to the chief inspector and proof of the original  
stamping shall accompany the request made to the chief inspector. Restamping  
authorized by the chief inspector shall be done only by an inspector, and shall be  
identical with the original stamping, except that it will not be required to restamp  
the ASME code symbol. Notice of completion of such restamping shall be filed with  
the chief inspector by the inspector who stamped the boiler, together with a facsimile  
of the stamping applied.  
History: 1979 AC.  
R 408.4167 Penalty for operation of unsafe boilers.  
Rule 167. If, upon inspection, a boiler is found to be in such a condition that  
it is unsafe to operate, the inspection certificate shall be suspended pursuant to section  
20(4) of the act. A person, firm, partnership, or corporation causing such a boiler  
to be operated shall be subject to the penalty prescribed in section 24 of the act.  
History: 1979 AC.  
R 408.4169 Condemned boilers.  
Rule 169. A boiler which has been inspected and declared unsafe by the chief inspector,  
deputy inspector, or special inspector and which the owner has determined will be  
scrapped shall be placed out of service and stamped or labeled with the word  
“condemned.” The stamping shall be as shown by the following facsimile and shall be  
situated in several conspicuous locations determined by the inspector.  
-CONDEMNED-  
History: 1979 AC; 1995 AACS; 2013 AACS.  
R 408.4171 Removal of used boilers from state.  
Page 32  
Rule 171. (1) If an ASME boiler located in this state is to be moved to another state for  
temporary use or repairs, application shall be made by the owner to the chief inspector for  
permission to reinstall the boiler in this state as prescribed in R 408.4177.  
(2) Repairs conducted outside of this state to boilers or pressure parts of boilers that  
will be reinstalled in this state shall be conducted by an organization in possession of a  
valid certificate of authorization to repair boilers. The organization shall conduct the  
repair pursuant to the NBIC and submit all forms required by the NBIC.  
History: 1979 AC; 2009 AACS; 2013 AACS.  
R 408.4172 Nonstandard boilers; bringing into state.  
Rule 172. (1) If a nonstandard boiler that is in use in this state is removed outside the  
boundaries of the state, it cannot be brought into the state and reinstalled without the  
permission of the board of boiler rules.  
(2) A person may petition the board to approve the use of a nonstandard boiler. Upon  
receipt of the petition, the board shall cause to be conducted testing and evaluation it  
considers desirable for the nonstandard boiler to determine whether construction is  
equivalent to standards specified in R 408.4025.  
(3) A boiler owner requesting to have a special installation and operational permit shall  
submit the following items to the board of boiler rules, as applicable, in the English  
language and units:  
(a) A list of all existing or proposed design and service conditions, maximum allowable  
working pressure (MAWP), and temperature, internal and external loading, corrosion and  
erosion allowance, heat treatment, service requirements, or service conditions.  
(b) Documentation that the manufacture of the boiler is based on requirements from the  
applicable ASME code section as follows:  
(i) Power boilers – section I  
(ii) Materials specifications – section II  
(iii) Nuclear power plant components – section III, division 1 and 2  
(iv) Heating boilers – section IV  
(v) Pressure vessels – section VIII, division 1 and 2  
(vi) Welding and brazing qualifications – section IX  
(vii) Fiberglass-reinforced plastic pressure vessels – section X  
(viii) Power piping – ASME B31.1  
(4) If the design, construction, and certification were not based on ASME code rules,  
the manufacturer of the boiler shall provide a copy of the design rules used and show how  
they meet or exceed the ASME code requirements by providing all of the following:  
(a) A complete set of design drawings showing weld joint details and construction  
including internal and external attachments.  
(b) A list of all pressure boundary materials or those materials and the material’s  
thickness subject to stress due to pressure and loading. The list shall include a material  
specification to meet or exceed the applicable ASME codes specification. If material  
used is a specification other than referenced in the applicable ASME code section, the  
manufacturer of the boiler through the owner shall submit a copy of the material  
specifications used in the vessel construction and indicate how it is considered equivalent  
to the ASME Code. Stress values used in all design calculations shall meet or exceed the  
Page 33