ANSI / MSS SP 55 2011 (MSS SP-55-2011) Quality Standard for Steel Castings for Valves, Flanges and Fittings and Other Piping Components - Visual Method for Evaluation of Surface Irregularities. **CONTAINS FOLDOUTS & PICTURES** Available October 2011

This Standard provides a series of reference photographs typical of the various surface irregularities common to steel pressure castings and illustrations of generally acceptable and generally rejectable quality. This document specifies the visual method for the evaluation of surface irregularities and also features foldouts and pictures.

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