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Production of shaped tube developed in virtually any manufacturer of metal products. Tube profile has a wide application in construction, production of building structures, agricultural engineering and other industries. The use of pipes in the production of specialized building designs has several advantages, leading ultimately to the economy of metal and, therefore, and cash. Profile pipes manufactured by electric-profiling of the round billet directly in the line of welding mills. It provides high accuracy in the geometrical parameters of pipes.

Profile pipes produced without heat treatment. Quality control of the weld is carried out non-destructive testing instruments. Technical requirements according to gost 13663-89. Pipes are distinguished by cross-sectional shape: the ordinary pipe (ring section) and steel pipes shaped (square, rectangular, oval, flat-tube). In this article we will discuss the scope of square and rectangular. Shaped pipes are made of stamps steels: St2, St3, 08KP, 10,20 and low-alloy 09G2S, 17GS (GOST 1050-88 and gost 380-94).

Mechanical characteristics of pipes with gost 13663-86. Rectangular and square shaped tubes are used in construction: shopping malls Pavilions stadiums and sports facilities industrial buildings Warehouses masts, transmission towers and cell towers Towers flyovers, bridges, lifts, cranes, etc. The use of rectangular and square steel profile tubes effectively in the construction of tall buildings (metal frame) and long-span structures. The main uses of shaped tubes Building shaped tubes are used as fasteners, bearings and Column: 1. Columns of buildings, including – light 2. Building a farm (the band, lattice, etc.) 3. Communication to cover 4. Vertical connections on the columns of all types of buildings 5. Elements of the wall fencing (girders and the Half-timbered houses stand) 6. Elements of the tall lattice structures (power lines, radio tower, cell tower) 7. Frameworks stack 8. Bridge-building (Communication, grill – use special steel bridge) 9. Skeletal elements 10. Any svyazevye elements in the housing 11. Industrial Gallery (CHP, steel mills, power stations, hangars, etc.), etc. The advantages of using rectangular and square steel profile tubes in construction are: the reduction of metal objects (such as when used as a savings of metal columns in the order of 25% compared with I-beam) Increase the speed and ease of installation erected buildings and structures increase the corrosion resistance of metal (as compared with other types of rolled) Ensuring compliance with sanitary and hygienic standards, ease of sanitization and disinfection Providing fire protection and fire prevention standards compliance, ease of handling special means Cold formed, electric-shaped tubes can effectively replace the traditional Construction of metal: beams, channels, angles. Ability to use a wide variety of architectural and design solutions for the creation of modern forms and proportions, etc. Builders abroad for many decades preference for square and rectangular shaped tubes. The modern buildings of metal, glass and concrete (high-rise apartment buildings, offices, banks, sports facilities, etc.) that adorn most of the cities abroad, erected using square and rectangular steel sections.

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