: Inspectors compare a 4 in. x 5 in. (100mm x 125mm) area of a casting against these photos to determine if a surface condition is acceptable or rejectable. 2025 Updates : The latest edition expands its scope to include iron and ductile iron castings , providing a unified basis for acceptance. Common Surface Irregularities (12 Types)
To comply with SP-55, the following conditions must be met: mss sp 55 pdf
Always check the revision date on the first page of your PDF. If it says "Reaffirmed 2023" or "Published 2018," you have the current version. : Inspectors compare a 4 in
If you work in quality control, purchasing, or engineering within the oil & gas, petrochemical, or power generation industries, MSS SP-55 is a critical document. Here is a breakdown of why the PDF version is so valuable: 2025 Updates : The latest edition expands its