Couplings extend a run by joining two lengths of pipe that are highly demanded in the pipe fitting market.


Pipe couplings are highly demanded in the pipe fitting market. Pipe couplings are fittings that help to extend or terminate pipe runs. These fittings are also used to change pipe size. Couplings extend a run by joining two lengths of pipe. They are known as reduced coupling if they are used to connect pipes of different sizes.

Couplings are also known as repair couplings. These couplings are without stops or ridges and they can be fixed anywhere along the pipe length for preventing leak of any kind.


Besides being used as an important pipe fitting, couplings are also used in the following:

Coupling usage
  • Machine tools
  • Assembly machinery
  • Industrial robots
  • Automated plants
  • Printing machinery
  • Servo drives
  • Robotic axes
Coupling usage
  • Manipulators
  • CNC milling / grinding
  • Linear actuators
  • Packaging machinery
  • Woodworking machinery
  • Textile machinery
  • Printing machinery
  • Metal cutting machinery etc.


Some important features of couplings are as follows:

  • Couplings come in all standard pipe sizes and are available for almost all types of pipe.
  • Available in several finishes.
  • Mostly cylindrical in design.
  • Couplings compensate for axial, lateral and angular shaft misalignment.
  • Couplings operate in quiet and smooth way.
  • There is a great degree of torsional stiffness.
  • There is the right angular transmission of angular motion and torque.
  • Usually long life.
  • Easy mounting and dismounting.
  • Low lateral stiffness etc.

Parts of Pipe Coupling as shown below

Tied universal expansion joint applications

Materials Used

Pipe couplings are made of various materials and the buyers should always consider the material used for making them. Some of the materials used for making couplings are:

  • Brass
  • Aluminum
  • Cast Iron
  • Stainless Steel
  • Copper
  • Bronze etc.
Pipe couplings

Designs on couplings

  • Grid type
  • Gear type
  • Disc type
  • Rubber/Elastomer element type
  • Fluid Couplings


Coupling inspection
Coupling inspection
Coupling inspection
Coupling inspection
Coupling inspection
Coupling inspection


Coupling packing
Coupling packing
Coupling packing
Coupling packing
Coupling packing
Coupling packing

Any type of packing is available according to customer need to worldwide destinations.

  • For roadfreight in timber fingers or skids.
  • In strong open or closed wooden boxes depending destination.
  • Each bundle is protected with plastic sheets.
  • Customers can provide their own packing or Salem can prepare a packing plan.
  • Detailed packings lists are attached to wooden cases to give quick and clear identification of contents.

Hot products


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【H】 Cast basalt lined steel pipe

Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.

【H】 Ceramic Tile Lined Pipes

Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.

【H】 Rare earth alloy wear-resistant pipe

The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.

【H】 Tubes Erosion Shields

Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.

【H】 ASTM A213 T91 Alloy Tube

The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.