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What is a union fitting?

What is a union fitting?

A union is a threaded fitting which allows the pipe work to be separated and reconnected without any horizontal movement in the pipe. It can be a standalone pipe fitting connecting two pieces of pipe, or an integral part of another fitting (such as a ball valve) which allows it to be separated.

Which way does a union go on a pipe?

Actually, pipe unions are designed to flow from the Female Nut towards the Male threaded half. Nobody pays attention to it and it normally will not cause a problem, however they should be installed properly when in High Pressure High flow service.

What is the difference between coupling and union?

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.

When would you use a union fitting?

A pipe union is a type of fitting that is used to connect two pipes together while providing an easy way to disconnect the pipes in case that is necessary.

How do you install a Union fit thread?

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.

How do you install a union copper pipe?

Separate a brass or copper union by unscrewing and removing the central nut. Spread flux inside the slip fittings on both halves of the union and on both ends of the pipes you want to join using the small brush that comes with the flux. Slide each half of the union onto the end of one of the pipes.

What is the difference between socket and union?

Couplet or socket — To connect two pipes. Union – To connect two pipe connection. Generally both item have same function to connect pipes.

What is a socket union?

Socket weld Union is a pipe attachment detail in which a pipe is inserted into a recessed area of a Valve, fitting or flange. In contrast to buttweld fittings, Socket Weld Fittings are mainly used for small Pipe Diameters (Small Bore Piping); Generally for Piping whose Nominal Diameter is NPS 2 or smaller.