Section 296-307-48027 - Low-pressure oxygen manifoldsThis section applies to cylinders with a maximum DOT service pressure of 200 psig.
(1) Manifolds must be of substantial construction suitable for use with oxygen at a pressure of 250 psig. They must have a minimum bursting pressure of 1,000 psig and must be protected by a safety-relief device that will relieve at a maximum pressure of 500 psig. Note: | DOT-4L200 cylinders have safety devices that relieve at a maximum pressure of 250 psig (or 235 psig if vacuum insulation is used). |
(2) Hose and hose connections subject to cylinder pressure must meet the requirements of WAC 296-307-48049. Hose must have a minimum bursting pressure of 1,000 psig.(3) The assembled manifold including leads must be tested and proven gas-tight at a pressure of 300 psig. The fluid used for testing oxygen manifolds must be oil-free and not combustible.(4) The location of manifolds must meet the requirements of WAC 296-307-48025.(5) The following sign must be conspicuously posted at each manifold: Low-Pressure Manifold
Do Not Connect High-Pressure Cylinders
Maximum Pressure-250 PSIG
Wash. Admin. Code § 296-307-48027
Amended by WSR 20-21-091, Filed 10/20/2020, effective 11/20/2020Statutory Authority: RCW 49.17.040. 98-24-096, § 296-307-48027, filed 12/1/98, effective 3/1/99. 97-09-013, recodified as § 296-307-48027, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. 96-22-048, § 296-306A-48027, filed 10/31/96, effective 12/1/96.