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

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• added by Kuanysh 06/05/2013 18:35
• info modified 06/07/2013 10:33

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