Mss Sp-55 Standard Pdf Jun 2026

: It applies to all steel casting grades intended for use in valves, flanges, and fittings.

The standard includes dual units (inch to mm). The PDF typically lists inches first, with millimeters in parentheses. mss sp-55 standard pdf

it provides a uniform way for manufacturers and purchasers to agree on what constitutes an acceptable surface finish. Purpose and Scope : It applies to all steel casting grades

: The standard is unique because it includes a series of reference photographs that illustrate both "acceptable" and "unacceptable" surface conditions. the casting passes.

: If the irregularity is less severe than the "Acceptable" reference photo for that specific type, the casting passes.