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About This Item

 

Full Description

Purpose: To provide a Standard Practice for Excess Flow Valves installed in low pressure fuel gas piping systems which are designed to protect the appliance and its connections to the piping system by reducing the flow of gas should the flow in the line exceed some predetermined level.

Scope: This Standard Practice applies to Excess Flow Valves used with gas fired appliances in Fuel Gas Distribution Systems with operating pressures between 5 inches water column (5" w.c.) and 14 inches water column (14" w.c.).
 

Document History

  1. MSS SP-133-2010

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    Excess Flow Valves for Low Pressure Fuel Gas Appliances

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  2. MSS SP-133-2005


    Excess Flow Valves for Low Pressure Fuel Gas Appliances

    • Historical Version