The connection material for joining two pipes is called a union. Unions allow pipes to be joined without welding, and pipes can be disassembled and installed from where the union is during repair.
Where are the unions used?
The fittings, which are used in all kinds of places where pipes must be laid, and in the sub-installations of the places, provide great convenience in situations that require both assembly, use and repair, as they provide the opportunity to easily add the pipes without turning them.
Unions connect pipes together and are usually made of materials such as steel, copper, PVC, cast iron or bronze. Some couplings have flexible construction to allow the pipeline to be rotated.
Unions are important plumbing parts that ensure the correct connection and sealing of pipelines.
Some features of unions are:
- Dimensions: The fittings are produced in different sizes and shapes in accordance with the size and shape of the pipeline. The diameter in the pipelines determines the size of the fitting.
- Material: Unions can be made of various materials, depending on the intended use of the pipeline and the pressure at which the liquid or gas will be transported. For example, steel or copper fittings can be used in high pressure pipelines.
- Type: Unions are divided into several types according to their fastening method. Some types of unions use threaded connections, while others use weld or flange connections.
- Waterproofing: The unions are designed to seal the joints of the pipes. Therefore, it is very important that the glands are waterproof. The watertightness of the glands may vary depending on the fastening methods.
- Durability: The fittings are designed to withstand temperature changes and pressure exposure at the joints of the pipes.
- Purposes of use: Glands have various uses. For example, PVC fittings are used for joining water pipes, while cast iron fittings are used for joining gas pipes.