Electric welded steel pipes longitudinal

Operational characteristics and scope of usage

Electric welded steel pipes longitudinal are widely used in many areas, but most commonly in construction and industry. They are mainly used for laying pipelines, creating different tubular metal structures, and many other products. These pipes are also used in the manufacture of furniture on a metal frame, in various metal structures, in the construction of fences. In production, round profiles are more widely used.

The electrical welding method is used to produce products. The steel strips are welded on special equipment, giving the seam a spiral or straight shape. The pipe itself can have any profile, not only round but also square, rectangular, oval.

Longitudinal pipes are widely used in the oil and gas industry.

The operational characteristics allow such pipes to be laid in places with sharp temperature changes, pressure surges, and other difficult conditions.

Types of electric welded steel pipes.

All articles are manufactured according to Inter-state standards:

  • GOST 13663-86 – rectangular and square pipes;

  • GOST 10706-76, GOST 10705-91 – round pipes.

The diameter of the round tubes differs depending on the modification and can be from 10 to 530 mm or 478 to 1420 mm according to GOST 10705-91 and GOST 10706-76 respectively.

Square and rectangular pipes, depending on their purpose, may be constructed as follows:

unmeasured – length 1.5–9 m;


multiple measures - the length can be equal to any multiplicity within the established minimum for measuring pipes.

Pipes of measured length come in the following sizes:

  • 5–9 m, if the pipe diameter does not exceed 70 mm;

  • 6–9 m, if the pipe diameter is from 70 to 219 mm;

  • 10–12 m for pipes with a diameter of 219–426 mm.

If the diameter of the pipe is more than 426 mm, it may only be manufactured in unmeasured length. 

Rectangular and square pipes are produced in two variants - with trimming of the ends, removal of burrs, or without such treatment. There are also models with thermal treatment for welding or the whole product, or without it.

Electric welded pipes are also classified by quality indicators:

  • A – improved mechanical performance;

  • B – improved chemical properties;

  • B – improved chemical composition and mechanical properties;

  • E – with normalization of test hydraulic pressure.

Some electric tubes may have seams. For circular tubes with a diameter of 57 mm, one transverse seam is allowed. In products with a diameter of 820 mm or more, the presence of 1 transverse and 2 longitudinal seams is allowed.

From the entire model range, 2 types of pipes are considered to be the most demanded:

  • water and gas steel electric welded pipes – used for piping;

  • electric-welded straight-line-seam pipes – used in the construction of steel structures.

Steel water and gas pipes.

The scope of application of products is the development of water and gas pipelines, including metal structures for them, as well as heating systems. 

The pipes are made of the following materials:

  • cold rolled sheet;

  • hot rolled sheet;

  • rolled steel.

Rolled steel is considered the best option.

According to GOST 3262-75, the pipes are capable of withstanding a hydraulic test. All the material for the production of pipes undergoes strict entrance control - for chemical composition, mechanical properties, etc. The obtained data are compared with the data specified in the factory quality certificate.

In the Ferges catalog, you will find a large assortment of steel pipes of various sizes, types, lengths, and designs, including electric welded pipes. Ferges company specialists try to keep the products in stock at all times. But if you need products of non-standard forms or sizes, place an individual order on our site. The maximum production period is 30 days.

For questions about ordering, delivery, or products, please contact Ferges managers by phone in the profile header. Call, such a rich assortment and such favorable prices you will not find anywhere else!