MSS SP-25-2013
MSS SP-25-2013 Standard Marking System for Valves, Fittings, Flanges, and Unions
standard by Manufacturers Standardization Society, 01/01/2014
Full Description
1. SCOPE1.1 This 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.
1.2 These specified markings serve to identify the manufacturer, the rating designation, materials of construction and special service limitations imposed by the manufacturer. They are used for product identification and to assist in proper application.
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