Mss Sp-55 Standard Pdf | PC |

| | Material / Application | | :--- | :--- | | A216 / A216M | Steel Castings for High-Temperature Service | | A217 / A217M | Steel Castings for High-Temperature, High-Strength Service | | A351 / A351M | Austenitic Steel Castings for High-Temperature Service | | A352 / A352M | Steel Castings for Low-Temperature Service | | A389 / A389M | Alloy Steel Castings for High-Temperature Service | | A487 / A487M | Low-Alloy Steel Castings for Pressure-Containing Parts |

– Rough, raised layers of metal over a layer of sand.

– Grooves or gashes left behind during the removal of risers, gates, or flash. mss sp-55 standard pdf

Each type of irregularity (e.g., gas porosity, sand inclusions, or cracks) is represented by five photos. In each set, the two photos on the left represent acceptable

Because MSS SP-55 is a copyrighted document developed by the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc., it is not generally available as a free download. To acquire a , you should use official sources: | | Material / Application | | :---

The inspector compares the surface defects on the casting to the standard photographs provided in the documentation.

Establishes objective visual benchmarks across different global foundries. In each set, the two photos on the

The ("Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components - Visual Method for Evaluation of Surface Irregularities") provides a uniform, visual-based assessment for surface irregularities in steel castings. It serves as a vital quality control tool for manufacturers, helping to identify and evaluate defects consistently.

Furthermore, new revisions (expected 2025-2026) may incorporate: