SP-25 - Standard Marking System for Valves, Fittings, Flanges, Unions (MSS)

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Valve & Fitting Standards
Manufacturers Standardization Society of the Valve and Fittings Industry

SP-25-1998, $146.00
Standard Marking System for Valves, Fittings, Flanges and Unions

This MSS marking system applies to valves, fittings, flanges, and unions used in piping connections which include (but are not limited to) flanged, soldered, brazed, threaded, or welded joints.