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Class 3000 SW Coupling Stainless Steel Fittings

Class 3000 SW coupling can manufactured as full coupling and half coupling.Stainless steel pipe fittings are popular because of the an-ti corrosive function.Stainless steel pipe fittings can used over 50 years.Socket weld fittings can be CL3000,CL6000 and CL9000.

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Class 3000 SW (socket weld) coupling is the most commonly used pressure fitting,there is also class 6000 pressure.Stainless steel fittings can be used over 50 years as its high corrosion resistance.


SW coupling means the coupling can socket with pipes by one or both ends. It is a commonly used accessory for industrial pipe connections.


Socket Weld(SW) fittings are high pressure fittings which are used in the pipe system,and only in conjunction with ASME pipes.SW fittings have same ranges of size(1/8”-4”) and pressures(2000lb,3000lb,6000lb,9000lb).



Full Coupling: Both ends of coupling can socket with pipes.

Half Coupling: One end of a half coupling is socketed and the other end is welded.



Straight: It is a kind of pipe coupling with the same diameter at both ends.

Reducing: The two ends of the coupling have different sizes



Shape Elbow, Tee, Cross, Coupling, Union, Cap, Reducing Insert, Sockolet
Size Range 1/8″ –  4″ / DN6 – DN100
Pressure Rating Class 3000lbs, 6000lbs, 9000lbs
Standard ASME B16.11, BS3799, EN 10241, MSS SP-83, MSS SP-97
Carbon Steel ASTM A105 / A105N, ASTM A350 LF2/LF3, ASTM A694 F42 / 46 / 56 / 60 / 65, P235GH, P265GH, P280GH, P355GH
Alloy Steel ASTM A182 F11 / 12 / 5 / 9 / 91 / 92 / 22
Stainless Steel ASTM A182 F304/304L/304H, 316/316L, 321, 310S, 317, 347, 904L,1.4404, 1.4437.
Duplex Stainless Steel ASTM A182 F51, F53, F44




They are widely used in various industries, including chemical processing, petroleum, refining, marine waste treatment, utilities / power generation, industrial equipment, natural gas compression and distribution industries.


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