Threaded Coupling-Full Coupling,Half Coupling | Hebei Haihao Group

Threaded Coupling-Full Coupling,Half Coupling

Haihao Group manufacture & supply & export pipe coupling more than 30 years.A pipe coupling is a very short length of pipe or tube which used in piping system,and it allows two pipes or tubes of equal or different size to be joined together.According to the types of end connection,it can be divided into threaded coupling and socket weld coupling.Threaded coupling means the coupling has threads at one or both ends.Socket weld coupling means the coupling with socket at one or both ends.

Threaded Full Couplings

Threaded Full Couplings

Types of threaded couplings:

  • Threaded full coupling
  • Threaded half coupling

What is a threaded full coupling?

Threaded full coupling means the coupling has two ends both thread.It is used to connect small caliber pipes and connect pipe to pipe or pipe to swage or nipple.Threaded full coupling can be divided into equal diameter or reducing diameter.

Threaded reducing full coupling is used to connect pipes of dissimilar diameters.A reducing full coupling has two different sizes of threads on each side.Threaded reducing couplings are typically used where small process feeder lines are joined into large supply circuits or where small diameter fittings are installed.Threaded reducing couplings will normally feature a simple,stepped down profile and screw onto the two lengths of pipe in the same way a standard pipe joint does.Welded reducing coupling designs are similar to threaded  design but feature no threads.

ASME B16.11 A182 F304 Threaded Half Couplings

ASME B16.11 A182 F304 Threaded Half Couplings

What is a threaded half coupling?

Threaded half coupling is used for small bore branching from a vessel or large bore pipe.A threaded half coupling only has one thread end and another end of the coupling should be butt welding end with either a plain end or a bevel end.

Specifications of threaded full/half coupling:

Size: 1/8″-4″

Pressure: 3000#,6000#

Thickness: SCH 10,SCH 40,SCH 80,SCH 160,XS,XXS

Standards: ANSI/ASME B16.11 or as the client required


Carbon steel: ASTM A105,A350 LF2,etc

Stainless steel: ASTM A182 F304,F304L,F316,F316L,F321,F347,F310,F44,F51,etc.

Alloy steel: ASTM A182 F1,F5,F9,F11,F22,F91,ASTM A694 F42,F46,F52,F56,F60,F65,F70,etc.

Coating: black,yellow paint,varnish,anti-rust oil,galvanized,epoxy coating or as for clients’ requirements.

Package: In wooded cases or pallets,or as for clients’ requirements.

Haihao Group manufacture threaded half coupling,threaded full coupling and threaded reducing coupling according to international standards or customers’ requirements.We also supply other types forged pipe fittings like elbows,tees, caps,bends,reducer, nipple,outlet,etc.If you want to know more about our pipeline products,please email