Mss Sp-55 Standard Pdf Page

"Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components – Visual Method for Evaluation of Surface Irregularities."

"MSS SP-55 applies to all metal castings." Fact: It explicitly covers steel castings for valves, pipes, and fittings. For iron castings, refer to MSS SP-41. mss sp-55 standard pdf