MSS SP-55-2001 Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components. Visual Method for Evaluation of Surface Irregularities

Manufacturers Standardization Society (MSS). 2001. 21 p. This standard is intended to supplement the requirements of ASTM Specifications A 2 16/A 2 16M, A 217/A 217M, A 351/A 351M, A352/A 352M, A 389/A 389M, A487/A487MYa nd A744/A 744M and to provide a series of refere.nce photographs typical of the various surface irregularities common to steel pressure castings and illustrations of generally acceptable and generally rejectable quality.