Mss Sp-55 Standard: Pdf

– General texture based on the casting method. Where to Find the MSS SP-55 PDF

– Small holes or voids from trapped gas.

– Surface folds from incomplete metal fusing. mss sp-55 standard pdf

: Twelve types of irregularities are categorized, with five examples for each—two showing acceptable levels and three showing rejectable ones. Categories of Surface Irregularities

First adopted in 1961, MSS SP-55 was developed by the Manufacturers Standardization Society (MSS) to supplement ASTM casting specifications. It bridges the gap between general casting requirements and the specific visual quality needed for pressure-containing parts in industries such as oil and gas, power generation, and chemical processing. – General texture based on the casting method

The standard classifies defects into to ensure inspectors use consistent terminology:

– Ridges on the surface from mold sand cracking. : Twelve types of irregularities are categorized, with

– Improper surface prep after a weld repair.

– Sand trapped in the molten metal showing on the surface.