Is Union the same as coupling?

The basic difference between a coupling and a union is that a coupling is for joining pipe to pipe or pipe to a swedge. A union is made for joining and disassemble of a part of a piping system (a steam trap or control valve, etc) for maintenance or replacement.

What is a coupler in plumbing?

Coupling & Adapter Fittings – Pipe couplers slip over the outside of two pipes to connect them, usually permanently. A coupling can be a reducer, or reducing coupling, meaning they reduce flow by joining a larger pipe to a smaller size. Adapters are used when connecting two pipes of different types.

What is a union on a pipe?

Pipe unions connect two pipes together in a way that requires only one pipe to be turned when removing the union, facilitating repairs. Pipe unions also prevent galvanic corrosion when connecting pipes of dissimilar metals.

What is the purpose of a coupler fitting?

A coupling (or coupler) (used in piping or plumbing) is a very short length of pipe or tube, with a socket at one or both ends that allows two pipes or tubes to be joined, welded (steel), brazed or soldered (copper, brass etc.) together.

What is difference between socket and union?

There are two connection forms for unions, i.e. socket welding and threaded connection. The socket welding is to insert the steel pipe into the socket to get welded. The union is widely used to connect pipes of different calibers, and is also widely used for connection of instruments, valves and pipes.

What is the difference between coupler and socket?

Full Coupling is used for connecting small bore pipes. It used to connect pipe to pipe or pipe to swage or nipple. A socket weld full coupling is used to join small-bore plain end pipes where the pipe spec requirement is socket weld. A threaded full coupling is used to join small bore pipes with threaded ends.

What’s the difference between a coupler and a connector?

As nouns the difference between coupler and connector is that coupler is someone who couples things together, especially someone whose job it is to couple railway carriages while connector is one who connects.

Where do unions go in piping?

Thread the male half of the union nut onto the left-side pipe, and tighten it securely. Slip the ring nut portion of the union onto the right-side pipe with the threads facing outward. Thread on the other half of the union nut, and tighten it securely.