Manufacturers Standardization Society
127 Park St NE, Vienna, VA 22180, United States
+17032816613
https://msshq.org/page/SP55
https://maps.app.goo.gl/aFXLPE3RnAovNeGh9
MSS SP-55-2025 establishes quality standards for iron and steel castings used in valves, flanges, fittings, and other piping components. This industry-recognized standard provides a visual method for evaluating surface irregularities through reference photographs that distinguish acceptable and rejectable casting conditions, helping manufacturers, inspectors, and engineers ensure consistent quality and compliance with ASTM specifications.