There’s a new 2011 Edition of the MSS SP 55, “Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components – Visual Method for Evaluation of Surface Irregularities.” This Standard Practice 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. It is an ANSI-approved American National Standard.
The document is intended to supplement the requirements of ASTM Specifications A216/A216M, A217/A217M, A351/A351M, A352/A352M, A389/A389M, A487/A487M, and A744/A744M.
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 (SCRA TA) Comparators for the Definition of Surface Quality of Steel Castings.
For additional nondestructive examinations defining quality of steel castings, MSS SP 55 may be supplemented by the following Standard Practices:
MSS SP-53 “Magnetic Particle Examination Method”,
MSS SP-54 “Radiographic Examination Method”,
MSS SP-93 “Liquid Penetrant Examination Method”,
MSS SP-94 “Ultrasonic Examination Method”, and
MSS SP-112 “Visual and Tactile Method”.
This new standard and all MSS documents may be purchased from Document Center Inc. at our website, www.document-center.com. Or you can order by phone (650-591-7600), fax (650-591-7617) or email (info@document-center.com). We are ready to assist you with all your standards requirements and questions.
