Standard of the American Association of Valve and Fitting Manufacturers–MSS Standards

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Standard code: MSS
Standard name: MSS SP 6-2001 – Standard for the accuracy of contact surfaces of pipe flanges, valves, and pipe fitting ends
MSS SP 9-2001 – Hole patterns on bronze, iron, and steel flanges
MSS SP 25-1998 – Standard marking methods for valves, pipe fittings, flanges, and pipe joints
MSS SP 42-1991 – Corrosion-resistant gate valves, globe valves, angle valves, and check valves with flanged or butt-welded ends; 150 lb class (PN20)
MSS SP-43-1991(R2001) – Forged stainless steel butt-weld pipe fittings (including information on other corrosion-resistant materials)
MSS SP 44-1996(R2001) – Steel pipe flanges
MSS SP 45-1998 – Bypass and drain connections
MSS SP 51-2000 – Corrosion-resistant flanges and cast iron pipe fittings; light-duty 150 lb class
MSS SP 53-1999(R2002) – Quality standards for cast and forged steel components used in valves, flanges, pipe fittings, and other pipeline components – Magnetic particle inspection method
MSS SP 54-1999(R2002) – Quality standards for cast and forged steel components used in valves, flanges, pipe fittings, and other pipeline components – Radiographic inspection method
MSS SP 55-2001 – Quality standards for cast and forged steel components used in valves, flanges, pipe fittings, and other pipeline components – Visual inspection method for evaluating surface defects
MSS SP 58-2002 – Pipe hangers and supports – Materials, design, and manufacturing
MSS SP 61-1999 – Pressure testing of steel valves
MSS SP 67-2002 – Butterfly valves
MSS SP 68-1997 – High-pressure butterfly valves with eccentric design
MSS SP 70-1998 – Cast iron gate valves with flanged or threaded ends
MSS SP 71-1997 – Swing-check valves made of gray iron with flanged or threaded ends
MSS SP 72-1999 – General-purpose ball valves with flanged or butt-welded ends
MSS SP 78-1998 – Cast iron plug valves with flanged or threaded ends
MSS SP 79-1999a – Socket-weld reducing couplings
MSS SP 80-1997 – Bronze gate valves, globe valves, angle valves, and check valves
MSS SP 81-2001 – Flanged-end stainless steel knife-gate valves without valve covers
MSS SP 82-1992 – Methods for pressure testing valves
MSS SP 83-2001 – 3000 lb class socket-weld and threaded steel pipe unions
MSS SP 85-2002 – Gray iron globe valves and angle valves with flanged or threaded ends
MSS SP 91-1992(R1996) – Guidelines for manual operation of valves
MSS SP-93-1999(R2004) – Quality standards for steel castings and forgings used in valves, flanges, pipe fittings, and other pipeline accessories – Liquid penetrant inspection method
MSS SP-94-1999(R2004) – Quality standards for ferritic and martensitic steel castings used in valves, flanges, pipe fittings, and other pipeline accessories – Ultrasonic inspection method
MSS SP-95-2002 – Drop-forged threaded pipe joints and large pipe plugs
MSS SP-97-2001 – Integrally reinforced forged branch outlets – Socket-weld, threaded, and welded types
MSS SP 108-2002 – Cast iron eccentric plug valves with elastic seals
MSS SP-117-2006 – Bellows seals for globe valves and gate valves
MSS SP 118-2002 – Compact steel globe valves and check valves with flanged, threaded, or welded ends; intended for use in chemical and petroleum refining industries
MSS SP-120-2001 – Design requirements for flexible graphite packing systems in rising-stem (open-stem) steel valves
MSS SP-125-2000 – Spring-loaded, center-guided check valves made of gray iron and ductile iron
MSS SP 126-2000 – Spring-loaded, center-guided steel check valves