How is the pipe electrically welded steel pipes?

Today is used Where the pipe is welded steel pipes? This product, which in modern conditions is widely used in various industries.

Usage

As a rule, put it where you need to transport gaseous or liquid substances with a high degree of aggressiveness. Therefore, the pipe of this plan can be found in engineering, for laying of the heating main level.

Pipe electrically welded steel pipes used in industry. Without it it is impossible to do with oil production, construction scaffolding, in the manufacture of furniture or even exercise equipment. Its versatility, good performance, excellent opportunities for welding (including the home) allow you to use it in a domestic environment for the formation and repair of engineering networks.

Dimensions

Electrically welded steel Pipes, GOST which has a number 10704–91, issue a certain random length for a specific diameter. For example, when the value of the latter up to 0.3 cm the product must not be shorter than 2 meters, and if this parameter is greater than 15.2 cm, the length cannot be less than 5 m. Also, there are dimensional options when for a given diameter pipe length is within limits. So, for record, up to 7 cm size of the article may range from 5 to 9 meters.

Production

What properties should have such a pipe? Welded steel pipes modification in the production must have settings that match the state requirements for articles used in a particular area. For example, pipes for oil and gas pipelines (transmission) are performed according to GOST 20295-85. They are formed by welding the electric arc or of the contact type (the latter with the use of high-frequency currents) with different classes of safety (from К34 to the K60).

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For the manufacture of products used heat-treated or hot-rolled steel (neutral or balanced) with content of C (carbon) is not more than 0.2% by weight. Its leaves twist into the tube, after which edges of sheets are heated and shock compressed rolls (electrode rings). The speed of such processes on special machines can be quite high (hundreds of feet of weld per minute, depending on wall thickness). Surgery is almost always accompanied by a cutting articles of desired length with split equipment.

Pipe electrically welded steel can get heat treatment as the entire length or only on the weld. Base metal products are not allowed captured, flaws, cracks, sunsets and bundles. Surface defects acceptable level should not be corrected by welding (only sweep) in order to maintain the required degree of reliability. Welded seams of the pipe should not have a lack of fusion, cracks, pores, cracks, slag inclusions which come to the surface.

Value

How expensive electrically welded steel pipes? The price of them, depending on the manufacturer, steel grade, diameter and wall thickness can vary from 32 to 45-48 thousand. When buying you should always pay attention to compliance with state standards, as the products pass the required tests, including the share of the viscous component, impact strength at different temperatures, tensile on the ovality of the article, the length of its deviations on the quality of the metal in a welded connection, etc.

Information about what product you plan to purchase, you can check the mark on the pipe. It must necessarily be placed at a distance of 10-150 cm from one end, labeled with paint and include the year of manufacture, data of technical control, the grade of steel, individual number of the pipe (batch) trademark of the manufacturer.