ASME B16.33-1990

This standard shall apply only to manually operated metallic valves, sizes NPS 1/2 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 design 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.