Section R. 408.11232 - High-pressure oxygen manifoldsRule 1232.
(1) An oxygen high-pressure manifold shall be not more than 6,000 cubic feet, except as permitted in subrule (3) of this rule.(2) More than 1 unit may be located in a room, but they shall be not less than 50 feet (16 meters) apart or separated by a noncombustible barrier not less than 5 feet (1.6 meters) high having a fire resistance of 1/2 hour.(3) An oxygen high-pressure manifold with an aggregate of more than 6,000 cubic feet (170 cubic meters approximately) shall be located outdoors in a separate noncombustible building or, if located in a building that is otherwise occupied, the manifold shall be located in a separate room of noncombustible construction having a fire-resistance rating of 1/2 hour or in an area with no combustible material within 20 feet (6.1 meters) of the manifold.(4) An oxygen manifold or oxygen bulk supply system with a storage capacity of more than 20,000 cubic feet (560 cubic meters), including unconnected reserves, shall be as prescribed in R 408.11222(9).Mich. Admin. Code R. 408.11232