Manufacturers Standardization Society of the Valves and Fittings Industry.

MSS SP-6 Standard finishes for contact faces of pipe flanges of valves and fittings

MSS SP-9 Spot facing for bronze, iron and steel flanges

MSS SP-25 Standard marking system for valves, fittings, flanges and unions

MSS SP-42 Class 150 corrosion resistant gate, globe, angle and check valves with flanged and butt weld ends

MSS SP-54 Quality standard for steel castings – radiographic inspection method for valves , flange, fittings and other piping components

MSS SP-55 Quality standard for steel castings for valves, flanges and fittings and other piping components

MSS SP-60 Connecting flange joint between tapping sleeves and tapping valves

MSS SP-61 Hydrostatic testing of steel valves

MSS SP-67 Butterfly valves

MSS SP-70 Cast iron gate valves , flanged and threaded ends

MSS SP-71 Cast iron swing check valves, flanged and threaded ends

MSS SP-72 Ball valves with flanged or butt – welding ends for general service

MSS SP-78 Cast iron plug valves

MSS SP-80 Bronze Gate, globe angle and check valves

MSS SP-82 Valves pressure testing methods

MSS SP-84 Steel valves socket welding and threaded ends

MSS SP-85 Cast iron globe and angle valves, flanged and threaded ends

MSS SP-86 Metric data in standards for valves, flanges and fittings

NACE MR0175 Standard material requirements for sulfide stress cracking resistant metallic materials for oilfield equipment.

MSS-SP-DUCTILE-IRON-VALVE

MSS-SP-GLOBE-VALVE

MSS-SP-STANDARD-BRASS-VALVE