Lutsk pipe steel seamless cold-smoked, hot-smoked steel st20, st45 6-630 mm (Metallobaza) delivery, cutting

Speaking of seamless metal pipes, as a rule, they immediately point to the high cost of products caused by the complexity of the production process. However, the sharp improvement in product quality compared to welded pipe not only pays for the costs, but also brings significant profits to manufacturers due to the high demand for seamless pipes. Seamless pipes are also in demand in the energy sector, heavy engineering and the chemical industry. Such a high demand, which has not disappeared with the proliferation of numerous varieties of plastic pipes, is explained: Many sectors of the economy are interested in seamless pipes, for which, first of all, the special strength of products is important. They apply: Seamless steel pipes ensure the functioning of many branches of the modern economy. Despite the spread of numerous plastic products, seamless steel products are in high demand, and there is no talk of ousting them from the market in the near future. Moreover, the strength characteristics, enhanced by the use of various additives, make seamless steel pipes truly indispensable in many sectors of economic activity, from aircraft construction to energy. Seamless. This is a more reliable option that can withstand the high pressure of the material flowing through the pipe. It's all about the lack of a connecting seam, which is the most vulnerable and unreliable area in the pipe design. The production process of seamless steel pipe is based on the use of steel ingots (blanks). They are preheated, then a hole is made (through), and then rolled through special roller machines. Thus, the blank is stretched along the hole, calibrated to the required size, aligned to the length of the pipe. The end result is a tube. In the seamless category, there is one subspecies that bears the name - cast steel pipes. They actually do not have a seam, because they are made using steel casting technology. Molten metal is poured into a special mold in which a central rod is installed. He will form a hole in the pipe (blank). After that, such a workpiece is rolled between the rollers, thereby forming and calibrating the pipe itself. Seamless pipes are not only a more reliable design, they are also an expensive product compared to seam pipes. They are mainly used in places where it is necessary to ensure the safe presence of a person. Round steel pipes They are fully consistent with the information described above. The only point that needs to be paid attention to is the method of production of seamless products. Two technologies are used here, in the process of which hot-formed pipes and cold-rolled pipes are produced. What is the difference between the two technologies? It all starts the same way: For the production of pipes, a steel billet is used, in which a through hole is made. This process is called press flashing. Pre-steel billet is very hot. But then both processes differ from each other. In the first case, the workpiece (cylindrical sleeve) is rolled with continuous heating. In the second, the sleeve is cooled with water, and after that it is rolled through the rollers of the rolling mill. In both cases, the production of a seamless round pipe is a complex and costly process, so such pipes are not cheap. But the technical and operational characteristics are very high, which determines the place of their application. Therefore, pipes of these two types are used in those systems where the highest structural strength is required (where the slightest leakage of the material transported through the pipes can lead to irreparable consequences). According to the shape of the section, steel pipes are divided into round and profile. In turn, profiles are divided into square, rectangular, oval, flat-oval, and so on. Steel pipes differ in the way they are made: electric-welded - straight-seam and spiral-seam, used for water pipes, gas pipelines, heating systems and structural parts; seamless - not having a weld or other connection. They are made by rolling, forging, pressing or drawing. They have found wide application: for the manufacture of main pipelines, for mechanisms for geo-prospecting for oil and gas. Steel pipes are divided by class: water and gas pipelines (VGP) GOST 3262-75. electric welded: straight seam GOST 10704-91, GOST 10705-80, GOST 10706-76; spiral stitch GOST 8696-74; for main oil and gas pipelines GOST 20295-85. profile: square GOST 8639-82, rectangular GOST 8645-68, oval GOST 8642-68 and GOST 8644-68. seamless: hot-formed GOST 8732-78, cold-formed GOST 8734-75, as well as special-purpose, made according to various specifications, TU. To increase resistance to corrosion, water and gas pipes and electric welded pipes can be coated with a layer of zinc, as well as