This Standard covers requirements for manually operated metallic
valves in nominal sizes 21⁄2 (DN 65) through 12 (DN 300) having the
inlet and outlet on a common centerline. These valves are intended
for controlling the flow of gas from open to fully closed
positions, for use in distribution and service lines where the
maximum gage pressure does not exceed 125 psig (8.6 bar). Valve
seats, seals, and stem packing may be nonmetallic.
This Standard sets forth the minimum capabilities,
characteristics, and properties that a newly manufactured metallic
valve must possess in order to be considered suitable for use in
piping systems indicated above, carrying 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.
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