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ASME B16.33 2012 Edition, September 21, 2012
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Manually Operated Metallic Gas Valves for Use in Gas Piping Systems Up to 175 psi (Sizes NPS ½ Through NPS 2)
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General This Standard covers requirements for manually operated metallic valves sizes NPS 12 through NPS 2, for outdoor installation as gas shutoff valves at the end of the gas service line and before the gas regulator and meter where the designated gauge pressure of the gas piping system does not exceed 175 psi (12.1 bar). The Standard applies to valves operated in a temperature environment between −20°F and 150°F (−29°C and 66°C).