Pipe couplings: types and materials of manufacture

Couplings are one of the most common elements for connecting pipes. They have a lot of different configurations and features that characterize their scope. Therefore, before choosing a pipe coupling it is necessary to study their specialization and design.

Kinds

First of all, it is necessary to say that these parts are actually a small scrap of material, which is fixed on two parts that need to be connected to each other. At the same time, some types of such devices can be made by hand, while more complex types need special equipment (read also the article Non-pressure pipes — we study all types and their features).

Repair parts

Usually this connection consists of either two halves, or of a kind of clamp. It should embrace the damaged area throughout its area and firmly fixed on it.

It should be noted that the repair coupling for pipes is usually used in conjunction with rubber seals, which should ensure complete sealing. However, at times, a larger-sized metal piece, which is fixed in place by welding, is used as such a construction.

Tip! Quite often, these products are used to organize outlets from the system. At the same time, the connection itself should have a seat to install an additional line.

Metal parts

• A typical coupling for metal pipes has the appearance of a brush on which the workpiece itself is mounted. At the same time for its fixation using a cut ring, which is placed on top of the junction.

• To fasten the whole structure, use a special nut, which is mounted on the pipe thread. It squeezes the ring tightly, preventing the system from jumping off the brush under load.
• It is worth noting that such a press sleeve for a metal-plastic pipe under pressure in the system begins to hold the material much stronger and it is almost impossible to break it.. Therefore, do not underestimate this design, although initially it does not inspire confidence.

• It is important to mention that the installation instructions for many types of plastic lines imply the installation of these products even on the main sections.. However, as practice has shown, they very poorly tolerate hydraulic shock, which means that this must be taken into account even at the design stage.

Tip! Such designs are usually developed for a specific type of material. Therefore, it is not necessary to operate them in other systems.

Plastic constructions

It is believed that such a material is best suited shrink sleeve for pipes or products, fixed by soldering. Such compounds create an almost monolithic structure and are most effective in their work.

However, you should immediately pay attention to the fact that there is a coupling for plastic pipes, which is fixed with a special glue. It is no less practical than the one for the installation of which heating is used, and its installation is much simpler.

The fact is that the glue used at first destroys the surface layers of the products, and then connects them, turning them into a monolith.

In fact, couplings for polypropylene pipes can have a very different configuration and appearance. However, threaded products for them are practically not used.

Tip! Glue joints are much easier to repair, although brazed products are considered more reliable, as they can withstand high system pressure.

Metal

The simplest metal clutch is considered to be the one that is fixed by means of a thread. It is very practical, can withstand heavy loads, and the price of its production fully justifies simplicity and reliability.

In this case, its main competitor is the coupling, mounted with the use of welding, although for its installation it is necessary to have special equipment.

There is also a special casing coupling and a similar system for connecting drill strings. They have different designs that can be equipped with additional locking elements or safety systems for quick disassembly.

However, such products are practically not used in everyday life.

Tip! Experts recommend choosing these types of products made from materials that are not susceptible to corrosion. The fact is that it is in these places that rust or blockage occurs.

Conclusion

After studying the video in this article, you can come to the conclusion that each type of material has several specific types of coupling creation. It should be borne in mind that each of them requires the presence of certain tools or operating conditions (see also the article Deflector for a pipe - what it is and why it is needed).