allowed for castings that fail the initial SP-55 inspection?
A 1/8-inch deep pit is acceptable on a 2-inch thick valve body but unacceptable on a 1/4-inch thick fitting. Always cross-reference thickness.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. MSS SP-55 - Manufacturers Standardization Society
is a widely accepted technical standard, first adopted in 1961. It is designed to act as a benchmark for visual inspection of iron and steel castings. mss sp-55 standard pdf
If you can tell me you are inspecting, I can provide more specific tips on how to apply the 60 reference photos . Share public link
High-quality digital PDFs allow inspectors to zoom in on reference photographs to accurately compare grain structures, pits, and cracks against the physical part.
Defining acceptable vs. unacceptable surface irregularities via visual inspection. allowed for castings that fail the initial SP-55 inspection
The standard is regularly updated, with recent versions including MSS SP-55-2011 and updated editions often cited in modern purchasing contracts.
The MSS SP-55 standard is important for several reasons:
– Structural voids caused by the metal freezing before filling the mold cavity completely. This public link is valid for 7 days
Legally, individual users may print one copy for internal use. However, MSS copyright prohibits resale or mass distribution. If you print it, ensure it is watermarked "CONTROLLED COPY."
To define acceptable surface quality levels using a standardized visual comparison method. Scope and Application
: It is widely used in high-stakes environments like nuclear energy, oil refining, and chemical processing to ensure the durability of pressure-containing components.