Pipes steel electrowelded straight-line (GOST10704-91) appeared quite recently, but almost immediately took a strong position in the market. Today, these products play an important role in the construction of objects for different purposes. These pipes are made of strip or sheet metal. Molding or electric welding is used in the production process.
The raw material is low-alloyed andcarbon steel. Steel pipes running metal, are welded with just one seam. Depending on what type of seam is used, the pipes are straight-seam or spiral-seam.
Appointment
Pipes steel electrowelded straight-line (GOST10704-91) are used for laying gas, water pipes and manufacturing parts of structures and heating systems. Galvanization can prevent corrosion of the material. It eliminates the concerns of maintenance and care. The use of such products allows you to increase the operational life and increase safety, because it reduces the likelihood of leakage.
Such pipes are used for devicepipelines with different flow rates and pressures. The electric-welded pipe is also used to construct gas pipelines that are operated at low pressure. This should include water and heat networks.
The length of the pipe can vary from 4 to12 m. Carbon steel pipes are used for laying pipelines and gas pipelines, the working pressure of which does not exceed 16 MPa. Calm, boiling or semi-quiet steel can form the basis of pipes.
Specifications
In the production process of the described productsused by GOST 10704-91. Pipes whose technical characteristics will be mentioned below may have a diameter ranging from 10 to 1420 mm. The wall thickness reaches 32 mm, and the minimum parameter is 1 mm. The consumer can coordinate with the supplier of goods intermediate values of diameter and wall thickness.
If you purchase products whose diameteris 57 mm or more, then one transverse seam is allowed. But if the diameter reaches 820 mm and more, then the longitudinal seams should be two, and the transverse one. Before purchasing a product, be sure to ensure that it was manufactured in accordance with GOST 10704-91. The pipe, the technical characteristics of which you should be aware of, can be represented by products of unmeasured or measured length. In the first case, we are talking about parameters up to 12 m, the minimum value is 2 m. While in the second, the minimum value is 5 m.
The final diameter often affects the length.If the first parameter is not more than 30 mm, then the length will be 2 m. The last value increases to 3 m, when the diameter varies from 30 to 70 mm. If this figure reaches 152 mm, the length of the pipe can be 4 m.
Pipe classification
The pipes described in the article differ in characteristics. Among others it should be highlighted:
- resistance to mechanical stress;
- high mechanical properties;
- hydraulic pressure parameters.
When choosing a variety ratiothese characteristics is of paramount importance. However, in any case, it is important to comply with GOST 10704-91. The pipe, the technical characteristics of which are disclosed in the article, can be further divided by the shape of the section, it can be:
- round;
- square;
- rectangular.
Such products also differ in the method of welding.In the production process, plasma welding can be used or work can be carried out using a tungsten electrode. Sometimes the pipes are welded in inert gas. With the help of current it is possible to obtain a high-quality seam. Still it is necessary to allocate laser and beam welding.
More on the field of use
Electrowelded products are used today indifferent areas of human activity, it can be construction and industry, as well as the tractor industry and the production of automobiles and metal structures. A smaller scale is the manufacture of furniture. The product will correspond to the range and the main features, if GOST 10704-91 will be used in its production. The pipe, the technical characteristics of which should be examined before purchasing products, is also used for the construction of playgrounds, as well as fences.
Physical and chemical properties classification
To date, four groups are known, onwhich are divided electric welded pipes. Group A combines those that have certain mechanical properties. But if the product belongs to group B, then it must have special chemical properties. The pipes will have certain chemical compositions and special mechanical properties if they belong to group B. When pipes are necessary that would meet the standards of hydraulic pressure, the consumer chooses those that represent group G.
Division of pipes by class
For supplying gases and liquids in the field of heatingand in the construction of metal, as well as scaffolding used pipes of the first class. But steel water and gas pipes (GOST 10704-91) belong to the second class. The same products can be used in chemical pumps, oil pipelines and gas pipelines. In the nuclear, chemical and food industries used pipes of the third class. They are resistant to pressure drops and high temperatures.
For exploration of crude oil used products 4class. But in car building and mechanical engineering, as well as in the manufacture of equipment that will be used in the repair and construction field, pipes of the fifth class are used. There is another class - 6. It accommodates pipes that go into the field of engineering.
Pipe weight
Если вы всё ещё не знаете, какого производителя choose when buying products described in the article, you can pay attention to LLC "Regionmetprom". This company offers high quality pipes. You can purchase water and gas products, shaped pipes, round welded and galvanized products. Before purchasing, you need to familiarize yourself with the main characteristics, among them - weight. It will depend on the diameter. If it is 10 mm, the wall thickness can be 1 and 1.2 mm. At the same time one meter of pipe will weigh 0.222 kg. By purchasing a 12-meter pipe, you will receive products with a wall thickness within 1 mm. At the same time 1 m will weigh 0.271 kg.
Pipe weight (GOST 10704-91) when laying sometimesmakes a huge difference. For a 14-meter pipe with a wall thickness of 1 mm, it is necessary to take into account the weight of one m, which is equal to 0.321 kg. When the diameter increases to 20 mm, the wall thickness becomes 1.2 mm, with one meter of the product already weighing 0.556 kg.
Another manufacturer and the cost of its products
For the consumer, one of the important factors inThe choice is usually the cost. If you have steel water and gas pipes (GOST 10704-91), then you will have to pay 46 rubles for one of them. per square meter. In this case we are talking about the product with the parameters of 15 x 2.8 mm, while the weight of 1 meter will be equal to 1.28 kg. And for a ton the consumer will pay 36,000 rubles.
When dimensions change to 20 x 2.8 mm, weightbecomes equal to 1.66 kg. This is true for one meter of product. You can buy it for 59.76 rubles. Price per ton remains the same. Pipes (GOST 10704-91) the manufacturer "Metal Service NN" offers to purchase. Products from this supplier are presented in a wide range. If you buy a gas pipeline with dimensions of 50 x 3.5, then you will have to pay per meter from 161 rubles. The weight of 1 meter in this case will be 4.88 kg.
Conclusion
Pipe GOST 10704-91, the diameters of which werementioned above, is a product with a wide range of uses. It can be used in various designs and when laying pipelines that transport any medium. Such pipes can be seen in service with certain types of industry.
