MSS SP-71-2011

This Standard Practice covers gray ironswing check valves with flanged and threadedends for general purpose service. The use ofswing check valves in steeply inclined orvertical lines requires special consideration.This Standard Practice also includes,directly or by reference, stipulations onchemical and mechanical properties ofmaterials and dimensions of end connectionsin common use.

This product replaces:MSS SP-71-2005 - Gray Iron Swing Check Valves, Flanged and Threaded Ends