There are three types of coupling available;
- Full Coupling
- Half Coupling
- Reducing Coupling
Full Coupling is used for connecting small bore pipes. It used to connect pipe to pipe or pipe to swage or nipple. It can be threaded or socket ends types.
Half Coupling is used for small bore branching from a vessel or large pipe. It can be threaded or socket type. It has a socket or thread end on only one side.
Reducing coupling is used to connect two different sizes of pipe. It is like concentric reducer that maintains a center line of the pipe but small in size.