R 408.11233 Low pressure oxygen manifolds.

Rule 1233. (1) The operating pressure of a low pressure oxygen manifold shall be not more than 250 psig. The following sign shall be posted at each low pressure oxygen manifold: Low pressure manifold: Do not connect high pressure cylinders Maximum pressure--250 psig (2) A low pressure oxygen manifold shall have a minimum bursting pressure of 1,000 psig and shall be protected by a safety relief valve which will relieve at a maximum pressure of 500 psig. The safety relief vent shall discharge outside of the plant at a point away from a source of ignition and where reentry could not occur. (3) A hose or hose connection subject to manifold pressure shall have a minimum bursting pressure of 1,000 psig. (4) An assembled manifold including leads shall be tested and proved gas tight at a pressure of 300 psig (2070 kPa gage). The material used for testing oxygen manifolds shall be oil-free and not combustible.