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U.S. Department of Energy
Office of Scientific and Technical Information

Standard marking system for valves, fittings, flanges and unions

Book ·
OSTI ID:6898209
The marking system described applies to valves, fittings, flanges and unions used in piping connections which include flanged, soldered, brazed, threaded or welded joints. These specified markings serve to identify the manufacturer, rating designation, materials of construction, and special service limitations imposed by the manufacturer.
OSTI ID:
6898209
Report Number(s):
MSS-SP-25-1978
Country of Publication:
United States
Language:
English