§ 13.16. Piping.
(a) As is provided by the National Fire Protection Association (NFPA—58), piping may consist of any of the following:
(1) Seamless copper.
(2) Brass.
(3) Steel.
(4) Aluminum, except that it shall not be used in exterior locations or where it is in contact with masonry, plastic walls or insulation.
(b) Except as provided in subsection (a), piping shall consist of wrought iron, steel, brass, or copper.
(c) Piping or tubing shall be of sufficient strength to withstand mechanical handling at the required working pressure, but in no case less than 125 pounds per square inch for gas and 250 pounds per square inch for liquid.
(d) Containers of 125 or more gallons water capacity manufactured after July 1, 1962, shall be provided with an approved device for liquid evacuation, the size of which shall be 3/4 inch National Pipe Thread minimum. A plugged opening will not satisfy this requirement.
This section cited in 34 Pa. Code § 13.4 (relating to scope); and 34 Pa. Code § 13.96 (relating to filling of cylinders).
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