scope:

(a) This Standard covers manually operated thermoplastic shutoffs and valves in sizes ½ through 6 which are suitable for use in thermoplastic distribution mains and service lines (as defined in the Minimum Federal Safety Standards cited below) where the maximum pressure at which such distribution piping systems may be operated is in accordance with the Code of Federal Regulations (CFR) Title 49, Part 192, Transportation of Natural and Other Gas by Pipeline; Minimum Safety Standards, for temperature ranges of −20 °F to 100 °F (−29 °C to 38 °C). The term valve is used in this Standard to represent shutoffs and valves to avoid repetition throughout the document. Valves covered by this Standard are intended for use below ground only.

(b) This Standard sets forth the minimum capabilities, characteristics, and properties which a newly manufactured valve must possess in order to be considered suitable for use in piping systems indicated above with natural gas, manufactured gas [includes synthetic natural gas (SNG)], and liquefied petroleum gases (distributed as a vapor, with or without the admixture of air) or mixtures thereof. (Components may be adversely affected by gases having high hydrogen content or compounds likely to form condensates. Specific application details must be considered.) Details of design and manufacture, other than those stated in this Standard, including design and production tests, remain the responsibility of the manufacturer.

(c) Standards and Specifications referenced under this Standard are shown in Annex A.