A pipe union connects 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.
Three parts of pipe union:
•A nut
•A female end
•A male end
With the joining of the female and male ends, the nuts are used to provide the necessary pressure to seal the joint.
The parts of the pipe union are normally locked together by at least one radial screw or nut with sized cross section. When severe pulling stress is applied onto the pipe union from the outside, the locking screw breaks and removes the two parts of the union, which in turn separates together with the pipes to which they are attached. Under normal conditions elastically stressed sealing objects ensure maintenance of watertightness between the union parts.
Types of pipe unions:
There are two basic types of pipe unions:
•Ground Joint Union
•Flange Union
The difference between the two is that the former consists of three pieces while the latter two pieces.
Applications of pipe unions:
Pipe unions are used in various municipal and industrial applications like as follows:
•Fire protection
•Process piping system
•Water and wastewater etc.
Advantages of pipe union:
There are various advantages of pipe unions like:
•To provide a leak-proof disconnection point in any piping system.
•Used for inserting metering and regulating devices into any plumbing application.
•Can connect piping system to vessels.
•Can join two pipes of different size together.
•Can easily remove the join between two pipes.
•Easy to install.
•Economical.
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