(iii) Regulators and low-pressure relief devices shall be rigidly attached to the
cylinder valves, cylinders, supporting standards, the building walls, or otherwise rigidly
secured, and shall be so installed or protected from the elements.
(2) When damage to LP-Gas systems from vehicular traffic is a possibility, the
employer shall ensure that precautions against such damage are taken.
(3) Piping, pipe and tubing fittings, and valves used to supply utilization equipment
within the scope of this standard shall be acceptable for services as approved by the
manufacture of the equipment.
(4) Welding is prohibited on containers.
(5) Valves, fittings, and accessories connected directly to the container, including
primary shut off valves, shall have a rated working pressure of at least 250 p.s.i.g. and
shall be of material and design suitable for LP-Gas service.
(6) Connections to containers, except safety relief connections, liquid level gauging
devices, and plugged openings, shall have shutoff valves located as close to the container
(7) All cylinders shall meet the provisions of the Department of Transportation Title
49 C.F.R. Part 178, “Shipping Container Specifications,” as adopted in R 408.41802.
(8) When operational requirements make portable use of containers necessary, and
their location outside of buildings or structures is impracticable, containers and
equipment shall be permitted to be used inside of buildings or structures in accordance
with R 408.41884 (12), (13), and (16), and the following rules:
(a) Systems utilizing containers having a water capacity greater than 2 1/2 pounds,
nominal 1 pound LP-Gas capacity, shall be equipped with excess flow valves. Such
excess flow valves shall be either integral with the container valves or in the connections
to the container valve outlets.
(b) Regulators shall be either directly connected to the container valves or to
manifolds connected to the container valves. The regulator shall be suitable for use with
LP -Gas. Manifolds and fittings connecting containers to pressure regulator inlets shall be
designed for not less than 250 p.s.i.g. service pressure.
(c) Valves on containers having water capacity greater than 50 pounds, nominal 20
pounds LP-Gas capacity, shall be protected from damage while in use or storage.
(d) Aluminum piping or tubing shall not be used.
(e) Hose shall be designed for a working pressure of at least 250 p.s.i.g. Design,
construction, and performance of hose, and hose connections shall have their suitability
determined by listing by a nationally recognized testing agency. The hose length shall be
as short as practicable. Hoses shall be long enough to permit compliance with spacing
provisions of this rule and R 408.41884 (6), (7), (8), (12), (13), and (16), without kinking
or straining, or causing hose to be so close to a burner as to be damaged by heat.
(f) Containers having a water capacity greater than 2 1/2 pounds, nominal 1 pound
LP-Gas capacity, connected for use shall stand on a firm and substantially level surface
and, when necessary, shall be secured in an upright position.
(g) The maximum water capacity of individual containers shall be 245 pounds
(nominal 100 pounds L.P. gas capacity).
History: 1979 AC; 1983 AACS; 2002 AACS; 2015 AACS.