scope:

Valve Types

This Standard covers only manually operated metallic valves in nominal pipe sizes 2½ through 12 having the inlet and outlet on a common center line, which are suitable for controlling the flow of gas from open to fully closed, for use in distribution and service lines where the maximum gage pressure at which such distribution piping systems may be operated in accordance with the Code of Federal Regulations (CFR), Title 49, Part 192, Transportation of Natural and Other Gas by Pipeline; Minimum Safety Standard, does not exceed 125 psi (8.6 bar). Valve seats, seals, and stem packing may be nonmetallic.

Application

This Standard sets forth the minimum capabilities, characteristics, and properties which a newly manufactured metallic 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. (Nonmetallic components, such as elastomer seals or sealants, 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, including design and production tests other than those stated in this Standard, remain the responsibility of the manufacturer.

Referenced Standards

Standards and specifications referenced under this Standard are shown in Annex A.