In this article, we will consider the key differences between water and gas pipes (WGP) and electric-welded pipes (EWP). We will analyze their production technologies, the materials used, and also pay attention to the technical characteristics and standards governing their manufacture and operation. Understanding the differences between these types of rolled metal pipes will allow engineers, builders, and designers to choose the best option for various engineering systems and construction projects.

How to distinguish a VGP pipe from an electric-welded one?

The main differences between water and gas pipes are in the materials used, production technology, dimensions, marking and area of application. VGP pipes are manufactured according to GOST 3262-75, while electric-welded pipes comply with GOST 10705-80 and GOST 10704-91.

Production materials

Both types of pipes are made from carbon steel, but certain grades of steel are used for VGP pipes:

Calm (SP) – is characterized by a minimum amount of non-metallic inclusions, which makes it convenient for welding and resistant to brittle fracture. The silicon content in the composition is not less than 0.12%.
Boiling (KP) - during crystallization, a large amount of gas is formed in it, which leads to a non-uniform structure. Such steel is subject to corrosion, is poorly welded and does not withstand serious mechanical loads.
Semi-calm (PS) – an intermediate option, which is closer in properties to calm steel, but still contains a certain amount of non-metallic inclusions.

For the production of electric-welded pipes, hard grades of steel are used, including ordinary and high-quality carbon alloys, as well as low-alloy steels. These materials provide increased strength, resistance to mechanical loads and reliability during operation in difficult conditions.

Production technology

The manufacturing process for both types of pipes is similar. Production begins with sheet metal, which is formed into a cylinder, after which the internal and external seams are welded. However, in VGP pipes, this seam is additionally reinforced to increase strength.

Additionally, VGP pipes can undergo galvanizing, as they are often used in high-humidity environments. Galvanizing protects the metal from corrosion and extends the service life of the pipes. Electric-welded pipes can also undergo galvanizing, but this happens less often.

Application areas

VGP pipes are widely used in the housing and utilities sector, as they are designed to transport water and gas. The main areas of application are:

Water supply and sewerage – are used for supplying drinking water and removing wastewater.
Gas supply – ensure the transportation of gas to consumers, maintaining operating pressure.
Industry – used in systems for supplying steam, refrigerant and other process media.

Electric-welded pipes are in demand in industry and construction due to their strength and ease of processing. They are used in:

Construction and infrastructure – for the construction of buildings, bridges, tunnels, as well as the installation of heating and ventilation systems.
Oil and gas industry – transportation of oil and oil products.
Energy – construction and maintenance of hydroelectric power plants, nuclear and thermal power plants.
Mechanical engineering – manufacturing of frames, conveyors, racks, equipment parts.
Agriculture and furniture production – in irrigation systems, greenhouse structures and frame elements.

Results: the main differences between VGP and ESW pipes

The differences between water and gas pipes and electric-welded pipes are in their cost, weight, corrosion resistance and strength characteristics:

ESW pipes cheaper and are used in structures that do not come into contact with water.
VGP pipes They are more expensive, but offer better corrosion protection and are lighter in weight, making them an ideal choice for utility systems.

State standards

Various GOSTs are used for the production of water and gas pipes and electric-welded pipes:

VGP pipes – GOST 3262-75, regulating requirements for dimensions, chemical composition, mechanical properties and testing methods.
ESW pipes – GOST 10705-80 and GOST 10704-91, regulating the chemical composition of steel, dimensions, welding methods and testing of pipes.

VGP and electric-welded pipes

Our catalogue contains pipes of various diameters and wall thicknesses, suitable for a wide range of tasks – from municipal and industrial systems to building structures.

By cooperating with us, you receive not only high-quality products, but also professional assistance in choosing the best option. Our specialists will help you select pipes taking into account all the requirements of your project, ensuring reliability, durability and safety of operation.