What are Pipe Joints?
Having a continuous length of pipe for a pipe network is not possible. Hence, pipe joints arean essential part of a pipe network. Pipe joint is the connection at the end of the pipe that ensures tight sealing and strength.
They are an important part of the plumbing system and used for multiple pipe connections. As per the requirement, different kinds of joints can be used.
Types of Pipe Joints:
There are various kinds of pipe joints are present. Let us discuss them.
- Threaded Joint: In this type, the joints are held together like bold and nut. One joint will have thread internally, while the other will have externally. They are joined by screwing in the thread which is provided in them. This kind of joints is used from 6 mm diameter to 300 mm diameter pipes.
Various pipes like PVC, CI pipes, copper pipes, etc. can have threads.
- Compression Joint: These joints are used when there is no preparation to join the two different lines. It is very economical. Plain end pipes are joined together by fittings; this joint is known as compression joint.
- Welded Joint:Also known as Butt-welded joint. One of the common methods of pipe joining is the welded joint. It is used in large infrastructure like a commercial, institutional, and industrial system.
Labor costs are more due to the non-availability of the trained welders and fitters.
The material cost is low.
- Socket-welded Joint: This kind of joint is suitable for the point where the chance of leakage is high. In socket-welding, pipes are joined as putting one into another and welded around the joint. This gives good results as compared to other joints.
- Brazed Joint: In brazing, joints are joined with the help of molten filler material at above 840. It is done for connecting copper pipes and copper alloy pipes. The melting point of the pipe material should be higher than the filler material.
It has less mechanical strength.
It is preferred in case of moderate temperatures.
- Soldered Joint: It is similar to the previous type of joint. Here, the filler material melts below 840. During this process, flux or metal joining used to prevent oxidation due to the flame.
It is suitable for low-temperature areas and has low mechanical strength.
- Grooved Joint: Pipes are joined together by making narrow cuts or depression (grooves) at the end of pipes with the help of sockets or coupling in this kind of joint.
Labor cost is less due to its ease of assembly.
Maintenance is easy because uninstalling and reinstalling is easy in this kind of joint.
Mostly used for fire production.
- Flanged Joint: It is commonly used for joining pipes in pumping stations, filter plants, hydraulic laboratories, boiler houses, etc.
Pipes with the flanged end are joined together at a proper level near one another. A hard rubber washer is placed between flanges and bolted.
It can be assembled and disassembled easily. Though it is costly it is preferred as they do not produce any leakage even after rapid temperature fluctuations.