This Standard prescribes requirements for the design, materials, fabrication, erection, examination, testing, and inspection of thermoplastic piping systems. Thermoplastic piping, as used in this Standard, includes pipe, flanges, bolting, gaskets, valves, fittings, special connecting components, and the pressurecontaining portions of other piping components, whether manufactured in accordance with standards referenced in this Standard or specially designed. It also includes hangers and supports and other equipment items necessary to prevent overstressing the pressurecontaining components.