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(a) Oxygen piping and fittings at pressures in excess of 700 p.s.i.g., shall be stainless steel or copper alloys.
(b) Hose connections and hose complying with Section 4839 of this Article may be used to connect the outlet of a manifold pressure regulator to piping providing the working pressure of the piping is 250 p.s.i.g. or less and the length of the hose does not exceed 5 feet. Hose shall have a minimum bursting pressure of 1,000 p.s.i.g.
(c) When oxygen is supplied to a service piping system from a low-pressure oxygen manifold without an intervening pressure regulating device, the piping system shall have a minimum design pressure of 250 p.s.i.g. A pressure regulating device shall be used at each station outlet when the connected equipment is for use at pressures less than 250 p.s.i.g.
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. Repealer and new section filed 5-16-75; effective thirtieth day thereafter (Register 75, No. 20).
2. Amendment filed 7-16-76; effective thirtieth day thereafter (Register 76, No. 29).
3. Amendment of subsection (a) filed 6-12-87; operative 7-12-87 (Register 87, No. 26).