Mss Sp99 Pdf
MSS SP-99 is officially titled . It specifically covers small valves—typically NPS 1 or DN 25 and smaller—designed for use in instrument control loops, sampling lines, and pressure gauge isolation.
The standard does not strictly mandate one material but lists acceptable material standards.
The valve body is subjected to a hydrostatic pressure of 1.5 times its ambient pressure rating with the valve partially open. This test checks for structural porosity, casting defects, or weld cracks in the valve shell. No visible leakage is permitted. mss sp99 pdf
Offers excellent corrosion resistance.
For instrument manifold systems, gauge isolation, and small-bore connections, MSS SP-99 is the definitive standard. MSS SP-99 is officially titled
A procurement officer wants to verify that a supplier's needle valve meets MSS SP-99. They open the PDF to cross-reference the required hydrostatic test duration.
The most current version, , is available for purchase in PDF and book format from authorized distributors like the MSS Website or the ANSI Webstore . Scope and Application The valve body is subjected to a hydrostatic pressure of 1
If you are a manufacturer, engineer, or procurement officer involved in instrumentation, acquiring the is essential for maintaining high-quality standards in your projects. Need to Find Specific Technical Standards? The latest revisions of specific engineering standards.
Specifies how valves must be labeled with manufacturer info, pressure ratings, and material identification. Why the Standard Matters
Combining two or more instrument valves into a single, compact body.
