Gas piping in buildings shall comply with ANSI Z223.1-1974, NFPA No. 54-1974, National Fuel Gas Code, three copies of which are filed with the Clerk-Treasurer, which standard is hereby adopted and approved. All pipe fittings, except stopcocks or valves, shall be malleable iron or steel when used with wrought iron or steel pipe. Where approved by the City Inspector, copper or brass pipe in iron pipe sizes assembled with threaded fittings of the same materials may be used with gases not corrosive to such materials.
Gas piping and fittings shall be clear and free from cutting burrs and defects in structure or threading and shall be thoroughly brushed and scale blown.
Defects in pipe or fittings shall not be repaired. When defective pipe or fittings are located in a system the defective pipe or fittings shall be replaced.