MSS SP-53-1999 (R2007)
MSS SP-53-1999 (R2007) Quality Standard for Steel Castings and Forgings for Valves, Flanges and Fittings and Other Piping Components-Magnetic Particle Exam Method
standard by Manufacturers Standardization Society, 01/01/1999
standard by Manufacturers Standardization Society, 01/01/1999