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CL3000 Threaded Coupling ASTM A150 Forged Pipe Fittings

CL3000 threaded couplings are the most used pressure of couplings,there are still CL2000 and CL6000 to choose.ASTM A105 forged pipe fittings are usually be chosen because of the affordable price and great functions.

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CL3000 threaded couplings are used to connect pipes in high pressure environments.ASTM A105 forged pipe fittings are carbon steel pipe fittings,for butt welded fittings in same material,the specification in American Standerd is ASTM A234 WPB.


Types of Threaded Couplings:

Full Coupling: Both ends of the full thread coupling are threaded.

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



Straight:CouplingS with the same diameter at both ends.

Reducing: The two ends of the coupling have different sizes.


Threaded Types:




Threaded pipe fittings have 3 grades of pressures to satisify different applications: CL2000,CL3000,CL6000,among these,the THD fittings of CL3000 is the most commonly chosen.


Carbon Steel Galvanized VS Stainless Steel

Carbon steel pipe fittings could be galvanized to enhance the anti corrosion function,it could be equivalent to stainless steel in some applications.



Shape Coupling
Size Range 1/8″ –  4″ / DN6 – DN100
Pressure Rating Class 2000lbs, 3000lbs, 6000lbs
Thread Type NPT, PT, BSPP, BSPT, PF
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


thd coupling boss cap


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