MSS SP-55-2006 Quality Standard for Steel Castings for Valves, Flanges, Fittings and Other Piping Components - Visual Method for Evaluation of Surface Irregularities
This Standard Practice is intended to supplement the requirements of ASTM Specifications A 216/216M, A 217/A 217M, A 351/ A351M, A 352/A 352 M, A 389/A 389M, A 487/A 487 M, and A 744/A 744M, and to provide a series of reference photographs typital of the various surface irregularities common to steel pressure castings and illustrations of generally acceptable and generally rejectable quality. Table 1 of section 5 is provided to show MSS interpretation as to the relationship between this Standard Practice and the levels of surface quality illustrated by the comparators and the photographs of the Steel Casting Research and Trade Association (SCRATA) Comparators for the Definition of Surface Quality of Steel Castings.