| Pipe type | Thickness, mm | Nominal bore, mm | Steel grades |
| Square pipe | 1,5; 2; 2,5; 3; 3,5; 4 | 40х40; 50х50; 60х60; 80х80 and 100х100 | St1; St2; St3; St4; 08; 10; 15; 20; 35; 45; 08u; 09G2; 09G2S etc. |
Square shaped steel pipe GOST 8639-82
Price: 0 $/per ton
* – Price is indicated only for small-scale wholesale and Ex-Works shipping( minimum value – 1 package). Loading characteristics, weight and length of pipe are presented at “Packing” tab. Express shipping of pipe is possible only for positions presented at “In stock” tab. Lower price shipment is possible for products, presented at “illiquid assets” tab. The price for batches from 20 tones is agreed individually.
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Types
Square shaped pipe produced by the company in zinkcoated and noncoated types.
Steel grades
Steel grades used for square shaped pipe production are regulated with GOST 13663-86. According to technical requirements of normative documents pipe is produced:
– as per GOST 380-2005 of carbon steel grades St1sp, St1ps, St1kp, St2sp, St2ps, St2kp, St3sp, St3ps, St3kp, St4sp, St4ps, St4kp;
– as per GOST 9045-93 of steel grade 08u;
– as per GOST 1050-2013 of steel grades 08, 08ps, 08kp, 10, 10ps, 10kp, 15, 15ps, 15kp, 20, 20ps, 20kp, 35, 45;
– as per GOST 19281-2014 of steel grades 09G2, 09G2SС, 10HSND;
– as per GOST 4543-71 – 10ГG2 and 30HGSA.
Compliance certificate
Production of square steel pipe is carried out at the electric pipe-welding mill “40-140” of the South Korean company “JUNGWOO EMC CO., Ltd”. The quality of UMC square steel pipe is confirmed by the compliance certificates GOST 8639-82 and GOST 13663-86.
Integrated Management System
The company has developed and implemented an integrated management system (IMS), confirmed by the compliance certificate. The certificate confirms that square shaped steel pipe GOST 8639-82 (GOST 13663-86) is produced in accordance with the requirements of GOST ISO 9001-2011 (ISO 9001:2008), GOST R 54934-2012 (OHSAS 18001:2007), GOST (ISO 14001:2004).
Weld seam test
Weld seam test of shaped steel pipes is carried out at electric magnaflux plant UMD-101M. Plant operation principle is based on creating of static magnetic field in tested objet and transformation of the field changes (leakage) into electric signal – defect signal. The leakage is generated by geometric and electromagnetic oscillations of the system “converter-product”, i.e. by defects such as steel discontinuity (see pict. 1).
Defect detector works in continuously-automated operating mode and while pipe moves it carries out non-destructive control testing of weld discontinuity, it also registers defects and informs the operator about the quality of weld seam, its deseaming and geometry. Immediate receiving of information shows the welder correctness or incorrectness of pipe forming operation and welding of shaped pipes.
Dimentions
Dimensions of UMC square shaped pipe:
| Outer diameter, mm | Wall thickness, mm | Sectional area, cm2 | Weight of 1 m, kg | Inertia moment, cm3 Lx=Ly | Resistance moment, cm4, Wx=Wy |
| 40 | 2 | 2,94 | 2,31 | 6,94 | 3,47 |
| 2,5 | 3,59 | 2,82 | 8,21 | 4,10 | |
| 3 | 4,21 | 3,30 | 9,31 | 4,65 | |
| 3,5 | 4,79 | 3,76 | 10,26 | 5,13 | |
| 4 | 5,35 | 4,20 | 11,05 | 5,52 | |
| 50 | 2 | 3,74 | 2,93 | 14,14 | 5,66 |
| 2,5 | 4,59 | 3,60 | 16,93 | 6,77 | |
| 3 | 5,41 | 4,25 | 19,45 | 7,78 | |
| 3.5 | 6,19 | 4,86 | 21,70 | 8,68 | |
| 4 | 6,95 | 5,45 | 23,70 | 9,48 | |
| 60 | 2 | 4,54 | 3,56 | 25,15 | 8,38 |
| 2,5 | 5,59 | 4,39 | 30,33 | 10,11 | |
| 3 | 6,61 | 5,19 | 35,11 | 11,70 | |
| 3,5 | 7,59 | 5,96 | 39,50 | 13,17 | |
| 80 | 3 | 9,01 | 7,07 | 87,81 | 21,95 |
| 3,5 | 10,39 | 8,16 | 99,75 | 24,94 | |
| 4 | 11,75 | 9,22 | 111,0 | 27,74 | |
| 100 | 3 | 11,41 | 8,96 | 177,0 | 35,40 |
| 3,5 | 13,19 | 10,36 | 202,2 | 40,44 | |
| 4 | 14,95 | 11,73 | 225,1 | 45,02 |
Not presented dimensions of square shaped pipe can be agreed individually.
Dimension tolerances are regulated by par. 6 of GOST 8639-82.
Mechanical properties
Mechanical properties of square shaped pipe are regulated with GOST 13663-86.
Depending on the application pipe is produced of the following groups:
– А with regulated mechanical properties of material used for shaped pipe production (in accordance with the following table);
– В with regulated mechanical properties (in accordance with the following table) and regulated steel chemical composition as per GOST 380-2005, 1050-2013, 4543-71, 9045-93 and 19281-2014.
| Steel grades | Tensile strength σв, N/mm2 (kgf/mm2), not less than | Percentage of elongation δ5, %, not less than |
| 08u | 294 (30) | 14 |
| 08, 08ps, 08kp | 314 (32) | 13 |
| st1sp, st1ps, st1kp | 333 (34) | 11 |
| st1sp, st1ps, st1kp | 353 (36) | 10 |
| st1sp, st1ps, st1kp | 363 (37) | 10 |
| st1sp, st1ps, st1kp | 372 (38) | 10 |
| 10, 10ps, 10kp | 353 (36) | 10 |
| 15, 15ps, 15kp | 372 (38) | 10 |
| 20, 20ps, 20kp | 372 (38) | 10 |
Packaging material
Black packaging steel strap (waxed and painted) 32*0,8 mm. Packing interval – 0,5 m from package end and further on at the distance of at least 1,5 m. Packing is carried out by import equipment Signode, providing ideal tension and package safety. Product transportation is possible without using bolsters. While transporting recently produced pipes, one shall take into account that all shaped pipes are thoroughly oiled.
Package length: 6; 11,7 and 12m (other dimensions can be agreed individually).
Package weight and dimensions:
| Pipe/closed profile type | Package size, mm (pcs) | Number of pieces in one package, pcs | Total pipe length of 6 m length package l.m. | Package weight, tn, thickness variations | ||
| 2 mm | 3 mm | 4 mm | ||||
| 40х40 | 480х480 (12х12) | 144 | 864 | 2,013 | 2,903 | 3,724 |
| 50х50 | 500х500 (10х10) | 100 | 600 | 1,776 | 2,586 | 3,336 |
| 60х60 | 480х480 (8х8) | 64 | 384 | 1,379 | 2,016 | 2,619 |
| 80х80 | 480х480 (6х6) | 36 | 216 | 3,08 | 4,031 | |
| 100х100 | 500х500 (5х5) | 25 | 150 | 2,706 | 3,552 | |
Description
Shaped steel pipe is one of the steel product types used as a construction material. The assortment of produced pipes includes profiles of different shapes, but the most popular are square pipe and rectangular pipe. Plasticity properties of the steel used in pipe production, allows to produce folded shaped pipes. Special mills and equipment – pipe benders – are used for bending. Galvanized shaped steel pipe is a product manufactured of cold-rolled galvanized steel.
Application field
Main application of shaped pipes is steel products manufacturing. Shaped pipes are used for building of different constructions: farms, gates, greenhouses, sheds etc. Besides they can be also used for making such objects as: bench, stairs, summerhouse, wicket, fence and so on.
Advantages
Main application of shaped pipes is connected with sustainable resistance to lateral loads. Planes situating perpendicularly to the pressure direction can provide higher resistance to pressure. This property makes profiled pipes more convenient in comparison with flexible round pipes. In case if the pressure direction is already known the strength characteristics of the pipe can be strengthened in advance by using rectangular section instead of square one. Generally it turns out that when using these pipe types in building structures specific consumption of steel materials can be reduced as well as costs. Another advantage is more stable attachment of various building materials to a smooth plane.
