How to connect gas pipes

Currently, there are many modifications of products used specifically for the supply of domestic gas, the choice of which is determined by the peculiarities of laying gas communications. In addition, our industry also produces universal pipes that can be used in gas supply systems of the most diverse classes.

At the same time, you should clearly realize that the safety of the operation of the entire highway as a whole will depend on the quality of the connection.

But before joining (regardless of the method of their articulation you choose), you should familiarize yourself with the existing varieties of products used.

Types of pipes

In recent years, polyethylene products, which successfully compete with traditional metal ones, are increasingly being used in laying gas networks. Their feature is that the technology of their production involves the pressing of the source material under high pressure. Due to this, polyethylene products have the following indisputable advantages in comparison with metal ones:

• high operational safety (due to the lack of electrical conductivity);
• resistance to destructive processes (corrosion and cracking);
• high resistance to aggressive environments;
• light weight and ease of formation of joints.

At once we will make a reservation that products from polyethylene are allowed to be used only within the apartment or the private house. External lines of gas supply are carried out, as a rule, on the basis of traditional metal.

Connection methods

The most important characteristic that determines the choice of the method of matching gas pipes is their cross section. The following options are possible:

1. For sections between half an inch and up to 2 inches, welded steel products with a threaded joint should be used.
2. For sections exceeding the specified values, seamless seamless ones are applied in a special jute shell. For their installation can be used as a threaded connection, and a special method of articulation.

Depending on the material used, you will need to choose one or another method of welding, as well as the appropriate welding equipment. So, for work with steel billets, a typical electric welding apparatus will be required, while a special heating device must be used for polymer welding.

In addition, gas pipelines (by analogy with water mains) can use fittings already familiar to us.

To seal all the articulations formed in this process, special fibers are used, impregnated with linseed oil or linseed oil.

Produced by the domestic industry fittings can have a very different design, while ensuring reliable joining of elements.

Upon completion of all repair work, you will need to invite a specialist who will have to make a test check of the pipeline for tightness. For this purpose, air is pumped into the products, the head of which must be an order of magnitude higher than the working pressure of the gas, which makes it possible to identify all possible leaks.

Finally, we note that when working with pipelines (before the connection) you should take all the necessary precautions that must be taken when handling an explosive substance such as gas.