: Specifically covers steel and (in the 2025 edition) iron castings for valves, flanges, and fittings.

Are you looking to integrate these standards into your quality control process? You can find the full document on the ANSI Webstore or directly through the Manufacturers Standardization Society for magnetic particle testing? MSS SP-55 - Manufacturers Standardization Society

: Surface pitting caused by the sand mold breaking down. Chaplets : Improperly fused metal supports.

MSS SP-55 uses a "Reference Photo" system to determine what is acceptable:

Here are some details about MSS SP-55:

: If the irregularity is more severe than the reference photo, the casting must be repaired (usually via welding) or scrapped.