SP-99 sets clear acceptance criteria for surface defects, thread conformity, and end connections (NPT, ISO, etc.).
“MSS SP-99 replaces ASME/API standards.” Reality: It complements them. For example, you may still need ASME B31.3 for piping design. mss sp-99 pdf
The is more than a file—it is a blueprint for reliability in instrumentation systems. By securing the official, current version and integrating its requirements into your procurement, receiving, and testing procedures, you eliminate guesswork, reduce fugitive emissions, and protect your facility’s uptime. SP-99 sets clear acceptance criteria for surface defects,