scope:

This standard shall apply only to manually operated metallic valves, sizes NPS ½ through 2, which are suitable for controlling the flow of gas and have a pressure rating not in excess of 125 psig. These valves may be used in piping systems designed and operated at pressures not in excess of the pressure rating marked on the valve and in accordance with the Code of Federal Regulations, Title 49, Part 192, "Minimum Safety Standards for Transportation of Natural and Other Gas By Pipe Line", ASME B31.8, or ANSI Z223.1. The standard shall apply to valves operated in a temperature environment between −20°F and 150°F.

This standard sets forth the minimum capabilities, characteristics, and properties which a valve at the time of manufacture must possess, in order to be considered suitable for use in gas piping systems. Details of design and manufacture, other than those stated in this standard, including such design and production tests that will produce a valve that will have the required capabilities to meet this standard, remain the responsibility of the manufacturer.

Each test in which damage to the valve could result, i.e., Tests 3.3, 3.4.1, 3.4.2, 3.4.3 and 3.4.4, shall be conducted on new unused samples of the valve.

Standards and Specifications

Standards and specifications adopted by reference in this standard and the names and addresses of the sponsoring organizations are shown in Annex A. It is not considered practical to refer to a specific edition of each of the standards and specifications in the individual references. Instead the specific edition references are included in Annex A. A product made in conformance with a prior edition of reference standards and in all other respects conforming to this standard will be considered to be in conformance even though the edition reference may be changed in a subsequent revision of this standard.