Supply and complete set of turnkey construction projects (499) 558-06-15 (495) 981-96-50 home About company Partners Services Contacts Vacancies Steel transitions, steel transitions Steel transitions, steel transitions Transition from steel - is a part for connecting two pipes of different diameters. Transitions made of steel can be of various diameters and are usually used for welding. Such transitions are made by stamping or casting, and in the production of transitions, steels of various grades can be used - carbon, alloyed, and also, for example, stainless. Transitions made of steel, as a rule, depending on the steel grades from which they are made, can be used for different environments. It can be water, steam, gas or other non-aggressive and corrosive liquids (acids or alkalis). Transitions are made using the electroslag centrifugal casting method or by stamping. They are used in oil, gas, chemical and energy industries. They are also used in the communal sector. Steel transitions are divided into two types: steel concentric transitions; eccentric steel transitions. Concentric steel transitions connect pipes along the central axis of symmetry, that is, narrowing (or thickening goes to the center of the pipe). This type of transition is used for horizontal pipeline laying. Steel eccentric transitions are made in the form of a truncated cone. They are used, as a rule, in vertical structures. The outer diameter of the transition according to GOST cannot exceed 530 mm. Eccentric steel transitions prevent the appearance of "bags" in the pipeline, makes it possible to clean the pipeline when it is turned off. Depending on what exactly is planned to be transported through the pipes, as well as on the environmental conditions, the type of steel that is used to make the transition depends: 20, 5XM, 15X5M, 12X18H10T. When working with a non-aggressive environment, carbon and low-alloy steels are used. If the transitions are to work in a highly aggressive environment, alloy and high-alloy steels are used for their manufacture. Transitions from steel according to the method of their manufacture are subdivided into turned, cast, stamped and seamless. Turned steel transitions are used at elevated pressures in the pipeline, for example in fire protection systems. Their use is also justified when the pipes to be connected pass according to different world standards. Cast steel transitions are used in the oil and gas industry. Stamp-welded steel transitions are used in the construction of linear pipelines, as well as technological piping of compressor stations and pumps. Seamless transitions are used in especially important sections of the pipeline in order to avoid stress on the seams, mainly for transporting water or gas. Most often, steel seamless transitions are used by water supply organizations, housing and communal services enterprises, construction and installation, energy, and agricultural companies. The wholesale company "Sever" offers a wide selection of concentric and eccentric transitions with nominal bore from 25 to 300mm, length from 45 to 220mm, weight from 0.2 to 32.8kg. In this case, the conditional pressure of the junctions varies depending on what substance will be transported through the junction - non-aggressive, moderately aggressive, or steam (hot water). For a non-aggressive medium, the permissible conditional pressure is from 6.3 to 10 MPa, for a medium aggressive transported substance, this number varies from 4 to 10 MPa. The nominal pressure for steam or hot water is the same, ranging from 4 to 10 MPa. Concentric and eccentric transitions Conditional pass Outside diameter L s s1 Conditional pressure PN (MPa), no more Weight no more (kg) Transported substances Dy dy Dн dн non-aggressive. medium aggression. steam, hot water fifty 40 57 45 60 4.0 2.5 10.0 6.3 10.0 0.2 5.0 4.0 10.0 10.0 10.0 0.3 32 38 45 4.0 2.0 10.0 6.3 10.0 0.2 5.0 4.0 10.0 10.0 10.0 0.3 25 32 4.0 2.0 10.0 6.3 10.0 0.2 5.0 3.0 10.0 10.0 10.0 0.3 65 fifty 76 57 70 3.5 3.0 10.0 4.0 10.0 0,4 6.0 5.0 10.0 10.0 10.0 0.7 80 65 89 76 75 3.5 3.5 10.0 4.0 6.3 0.6 6.0 5.0 10.0 10.0 10.0 0.9 8.0 6.0 10.0 10.0 10.0 1.1 fifty 57 3.5 3.0 10.0 4.0 6.3 0.6 6.0 4.0 10.0 10.0 10.0 0.9 8.0 5.0 10.0 10.0 10.0 1.1 40 45 3.5 2.5 10.0 4.0 6.3 0.6 6.0 4.0 10.0 6.3 10.0 0.8 100 80 108 89 80 4.0 3.5 10.0 4.0 6.3 1.0 6.0 6.0 10.0 10.0 10.0 1.4 65 76 4.0 3.5 10.0 4.0 6.3 0.9 6.0 5.0 10.0 10.0 10.0 1.1 fifty 57 4.0 3.0 10.0 4.0 6.3 0.9 6.0 4.0 10.0 10.0 10.0 1,2 125 100 133 108 100 5.0 4.0 10.0 4.0 6.3 1.7 8.0 6.0 10.0 10.0 10.0 2.6 150 125 159 133 130 4.5 4.0 6.3 4.0 4.0 2.6 8.0 8.0 10.0 10.0 10.0 4.1 100 108 4.5 4.0 6.3 4.0 4.0 2.4 8.0 6.0 10.0 10.0 10.0 3.7 80 89 4.5 3.5 6.3 4.0 4.0 2.2 8.0 6.0 10.0 10.0 10.0 3.4 200 150 219 159 140 6.0 4.5 6.3 4.0 4.0 5.3 10.0 8.0 10.0 10.0 10.0 7.2 250 200 273 219 180 7.0 6.0 6.3 4.0 4.0 8.6 10.0 8.0 10.0 6.3 6.3 11.3 12.0 10.0 10.0 * 10.0 10.0 14.6 300 250 325 273 180 8.0 8.0 6.3 4.0 4.0 12.2 10.0 10.0 8.0 6.3 6.3 14.6 12.0 12.0 10.0 * 8.0 8.0 17.2 350 300 377 325 220 10.0 8.0 6.3 4.0 4.0 20.7 12.0 10.0 8.0 6.3 6.3 24.9 14.0 *** 12.0 *** 8.0 * 8.0 6.3 * 29.1 16.0 16.0 10.0 10.0 8.0 32.8 400 350 426 377 220 10.0 10.0 6.3 4.0 4.0 27.9 12.0 ** 12.0 ** 8.0 6.3 6.3 33.4 14.0 *** 14.0 *** 8.0 * 6.3 * 6.3 * 39.1 16.0 16.0 10.0 8.0 8.0 54.3 Turnkey website development 2005-2015 © sansever.ru All rights reserved