Types and Advantages of Electric Resistance Welded Pipes

August 17, 2021

Types and Purpose of Electric Resistance Welded Pipes

The Electric Resistance Welded Pipes are common in almost all industries. Therefore, there are a great many types and sizes of channels and their classification may seem rather complicated for those who have encountered it for the first time.

Therefore, before buying this rolled metal, it is better to study how its different types differ and what the main parameters of the products depend on.

Electric Resistance Welded Pipes

This knowledge will also come in handy when choosing a supplier of rolled metal products. Therefore, we will talk about the types of channel and their application below.

Folded Electric Resistance Welded Pipes

There are many options for channel shapes, so it is important to make the right choice.

Electric Resistance Welded Pipes Parameters

All types of channels are united by the form. From the side, they look like the letter "P". When determining the parameters of the Electric Resistance Welded Pipes, it is necessary to distinguish between the shelves - these are the legs of the letter "P" and the wall - the jumper between the shelves. Height is one of the most important dimensions of the product.


It is understood as the distance between the shelves. This value is indicated as the channel number. For example, for a product come with 6.5P, the wall height will be 65 mm. The letter "P" means that the shelves are parallel to each other. According to GOSTs, the maximum length of the product is 12 meters. However, with a non-standard designation of channels, it can be even more.

Difference among Types

The main differences between different types of metal Electric Resistance Welded Pipes come in their manufacturing method. Each of them has its own characteristics and use cases. For each such type of product, its own GOST develop. According to the manufacturing method, channels come into:

  • Hot rolled
  • Bent equal legs
  • Special
  • Bent unequal

Benefits of Electric Resistance Welded Pipes

Long service life

Stainless steel lasts for decades, retaining its original appearance. It combines strength, resistance to moisture, temperature extremes, and chemical attack. Therefore, finishing the building with stainless steel sheets, you are making a profitable investment, which will pay off more than once in the future.

Aesthetics and ease of care

The surface of the stainless steel reflects light well. Due to its almost perfect smoothness, it does not retain dirt. Therefore, it is easy to wash the cladding, while leaving no stains or streaks. This is especially important for buildings with high traffic and entrances. After all, unwanted inscriptions and dirt can be easily removed.

Compatibility with the interior

Thanks to the neutral silver color, the stainless steel is in perfect harmony with almost any setting. This is the most advantageous option for minimalistic interiors of municipal buildings.

Electric Resistance Welded Pipes types According to the areas of use

It comes into the following groups:

  • Usual
  • Special for the automotive industry
  • Special for car building

All these classifications come into account in order to buy a Electric Resistance Welded Pipes for a specific production. But each type of rental has its own characteristics. To fully understand the differences, it is necessary to disassemble them as well.

Types of metal channels

Hot rolled

Hot rolled channel is manufactured by hot rolling. Such products are divided into two groups:

1-With parallel edges

The surface of its shelves is flat, without a slope. This channel has several lettering options. "P" - parallel edges, "L" - light, "E" - economical.

2-With a slope of the edges

The surface of each shelf has a slight slope from the inside towards the end. It ranges from 4-10%. This channel is designated by the letter "U".

Also, hot-rolled Electric Resistance Welded Pipes is classified according to rolling accuracy into:

  • High-precision products - marked with the letter "A".
  • Hire of normal accuracy - "B".
  • Channel with inclined and parallel flanges


Special channels are important for assembling cars and wagons. It can be high (A) and normal rolling precision (B). It can be 4–13 m in length. In length, it is divided into:

  • Measured
  • Unmeasured
  • Multiples of measured length

Bent equal legs

For the production of an equal-flange bent Electric Resistance Welded Pipes, a pipe mill is common. Materials are high quality carbon structural steel and regular quality coiled steel. The width of the product varies from 32 to 115 mm, and the height is from 50 to 400 mm.
Electric Resistance Welded Pipes 2021

Bent unequal

For the manufacture of unequal bent channel, a roll forming mill is common. Materials - low alloy steel, normal quality hot and cold rolled steel, high quality carbon structural steel. Width and height vary within the same limits as for an equal channel. For both the latter types of products of the highest quality are marked with the letters "A" and "B".

Using a channel

Due to the shape of the Electric Resistance Welded Pipes, metal consumption is greatly minimized during its production, and the product has an increased tensile strength. Therefore, this rolled metal is mainly common in construction and in the assembly of various structures as frame reinforcement.  In particular, with the help of channels, wall and interflow ceilings are also useful.


Due to its significant strength, this rolled metal very well reinforces any structures, giving them additional rigidity and even seismic resistance. In the construction of almost any facility, various types of metal channels are common. They often act as reinforcement for reinforcing concrete structures. Also, this rolled metal is common in the carriage and automobile construction.

Scope of application of Electric Resistance Welded Pipes

The Electric Resistance Welded Pipes have an extensive classification. It can vary in size, metal chemical composition, manufacturing method, and many other important parameters. Depending on their combination, it is possible to obtain metal products with different physical and chemical properties.

Chemical composition:

  • Normal quality. These are carbon steel hexagons.
  • High quality. This includes products made from alloyed and high-alloyed stainless steel.

Rolling precision:

  • She is assigned category "B".
  • High precision. Category "B".

Curvature of bars:

  • Class I. The curvature is 0.5% for a bar length of less than 40 mm. Or 0.4% for a length over 40 mm.
  • Class II. The curvature of the bar is 0.5% for the entire steel hex range.

Material condition:

  • Heat treated.
  • Not subject to heat treatment.
  • Hard-worked. Surface hardened by pressure or fine abrasive particles.

Steel Hex Surface Treatment Type:

  • Hot rolled.

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