Historical
MSS SP-115-2017
Excess Flow Valves, NPS 11/4 and Smaller, for Natural Gas Service
This Standard Practice covers Excess Flow Valves, NPS 11/4 and smaller, used in fuel gas distribution systems with operating pressures of 5 inches water column (in. WC) and above. The purpose of this standard is to provide a Standard Practice for Excess Flow Valves that are designed and installed in fuel gas piping systems to reduce the flow of gas should the flow in the service line exceed some predetermined level.
Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. [mss]
