§ 1926.153 Liquefied petroleum gas (LP-Gas).
(a) Approval of equipment and systems. (1) Each system shall have containers, valves, connectors, manifold valve assemblies, and regulators of an approved type.
(2) All cylinders shall meet the Department of Transportation specification identification requirements published in 49 CFR part 178, Shipping Container Specifications.
(3) Definition. As used in this section, Containers—All vessels, such as tanks, cylinders, or drums, used for transportation or storing liquefied petroleum gases.
(b) Welding on LP-Gas containers. Welding is prohibited on containers.
(c) Container valves and container accessories. (1) 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.
(2) Connections to containers, except safety relief connections, liquid level gauging devices, and plugged openings, shall have shutoff valves located as close to the container as practicable.
(d) Safety devices. (1) Every container and every vaporizer shall be provided with one or more approved safety relief valves or devices. These valves shall be arranged to afford free vent to the outer air with discharge not less than 5 feet horizontally away from any opening into a building which is below such discharge.
(2) Shutoff valves shall not be installed between the safety relief device and the container, or the equipment or piping to which the safety relief device is connected, except that a shutoff valve may be used where the arrangement of this valve is such that full required capacity flow through the safety relief device is always afforded.
(3) Container safety relief devices and regulator relief vents shall be located not less than 5 feet in any direction from air openings into sealed combustion system appliances or mechanical ventilation air intakes.
(e) Dispensing. (1) Filling of fuel containers for trucks or motor vehicles from bulk storage containers shall be performed not less than 10 feet from the nearest masonry-walled building, or not less than 25 feet from the nearest building or other construction and, in any event, not less than 25 feet from any building opening.
(2) Filling of portable containers or containers mounted on skids from storage containers shall be performed not less than 50 feet from the nearest building.
(f) Requirements for appliances. (1) LP-Gas consuming appliances shall be approved types.
(2) Any appliance that was originally manufactured for operation with a gaseous fuel other than LP-Gas, and is in good condition, may be used with LP-Gas only after it is properly converted, adapted, and tested for performance with LP-Gas before the appliance is placed in use.