This Standard covers requirements for manually operatedmetallic valves sizes NPS 12 through NPS 2, foroutdoor installation as gas shutoff valves at the end ofthe gas service line and before the gas regulator andmeter where the designated gauge pressure of the gaspiping system does not exceed 175 psi (12.1 bar). TheStandard applies to valves operated in a temperatureenvironment between 20F and 150F (29C and66C).