Establishes minimal requirements for valve bodies, bonnets, and stem seals.
Safely taking samples from high-pressure piping.
Before we discuss the PDF itself, it is crucial to understand what is inside the standard.
The full title of the standard is .
Lists acceptable materials that comply with ASTM specifications:
In the complex world of industrial piping and process control, standards are the backbone of safety and interoperability. If you are an engineer, a procurement specialist, or a manufacturer involved in instrumentation, you have likely encountered the standard.
Purchasing the official document ensures you have the latest revision, including any errata or addendums, and supports the organization that creates these vital industry standards. mss sp99 pdf
One autumn, the abbot entrusted Lucius with copying a new lectionary for the feast of St. Cecilia. It was a great honor. Lucius worked feverishly, skipping the step of double-checking his line spacing. On the tenth night, by dim tallow light, he wrote the final word: Amen .
Accessible via IHS Markit Standards Store.
Standards are updated every 5–10 years. As of 2025, the current version is (or later). If your PDF says "1999" or "2009," you need an upgrade. Revisions often address: The full title of the standard is
Covers standard dimensions for female NPT (National Pipe Thread), male NPT, tube fitting ends, and socket weld configurations. 3. Materials of Construction
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