| Pipe type | Thickness, mm | Nominal bore, mm | Steel grades |
| Longitudinal pipe | 1,5; 2; 2,5; 3; 3,5; 4; 4,5 | 48; 48,3; 51; 57; 60; 76; 89; 95; 102; 108; 114; 133; 140; 159 | Ст1; Ст2; Ст3; Ст4; 08; 10; 15; 20; 35; 45; 08Ю и др. |
Longitudinal steel pipe GOST 10704-91
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 longitudinal 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
Longitudinal pipe produced by the company in zinkcoated and noncoated types.
Steel grades
Depending on the customer’s request longitudinal pipe can be produced in accordance with the following requirements:
| Group | Standards of | Steel grades |
| А | mechanical properties | steel grades St1, St2, St3, St4 as per GOST 380-2005 (category 4 as per GOST 16523-97, category 1 as per GOST 14637-89) |
| Б | chemical composition | – killed, semi-killed and rimmed steel grades St1, St2, St3, St4 as per GOST 380-2005 and GOST 14637-89; – killed, semi-killed and rimmed steel grades 08, 10, 15, 20 as per GOST 1050-2003; – steel grade 08u as per GOST 9045-93; – low-alloy steel grade 22Gu; – low-alloy steel grades as per GOST 19281-2014 and other normative documents with regulated carbon equivalent not more than 0,46 % |
| В | mechanical properties and chemical composition | – killed, semi-killed and rimmed steel grades St1, St2, St3, St4 as per GOST 380-2005 (category 4 as per GOST 16523-97, categories 2-5 as per GOST 14637-89); – killed, semi-killed and rimmed steel grades 08, 10, 15, 20 as per GOST 1050-2003; – steel grade 08u as per GOST 9045-93; – low-alloy steel grade 22Gu; – low-alloy steel grades as per GOST 19281-2014 and other normative documents with regulated carbon equivalent not more than 0,46 % |
Compliance certificate
Production of longitudinal 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 longitudinal pipe is confirmed by the compliance certificate GOST 10705-80. On customer’s requirement UMC LLC can carry out other additional quality tests.
Integrated Management System
The company has developed and implemented an integrated management system (IMS), confirmed by the compliance certificate. The certificate confirms that longitudinal steel pipe GOST 10705-80 (GOST 10704-91) 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 electric-welded 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 longitudinal pipes.
Dimentions
Dimensions and weight (kg) of 1 linear meter:
| Outer diameter, mm | Wall thickness, mm | |||||||||||
| 1,5 | 1,8 | 2,0 | 2,2 | 2,5 | 2,8 | 3,0 | 3,2 | 3,5 | 3,8 | 4,0 | 4,5 | |
| 48 | 1.72 | 2,05 | 2,27 | 2,48 | 2,81 | 3,12 | 3,33 | 3,54 | 3,84 | – | – | – |
| 48,3 | 1,73 | 2,06 | 2,28 | 2,5 | 2,82 | 3,14 | 3,35 | 3,56 | 3,87 | – | – | – |
| 51 | 1,83 | 2,18 | 2,42 | 2,65 | 2,99 | 3,33 | 3,55 | 3,77 | 4,1 | – | – | – |
| 57 | 2,05 | 2,45 | 2,71 | 2,97 | 3,36 | 3,74 | 4 | 4,25 | 4,62 | – | – | – |
| 60 | 2,16 | 2,58 | 2,86 | 3,14 | 3,55 | 3,95 | 4,22 | 4,48 | 4,88 | 5,27 | – | – |
| 76 | 2,76 | 3,29 | 3,65 | 4 | 4,53 | 5,05 | 5,4 | 5,75 | 6,26 | 6,77 | 7,1 | 7,93 |
| 89 | – | 3,87 | 4,29 | 4,71 | 5,33 | 5,95 | 6,36 | 6,77 | 7,38 | 7,98 | 8,38 | 9,38 |
| 95 | – | – | 4,59 | – | 5,7 | – | – | 7,24 | – | – | – | – |
| 102 | – | 4,45 | 4,93 | 5,41 | 6,13 | 6,85 | 7,32 | 7,8 | 8,5 | 9,2 | 9,67 | 10,82 |
| 108 | – | 4,71 | 5,23 | 5,74 | 6,5 | 7,26 | 7,77 | 8,27 | 9,02 | 9,76 | 10,2 | 11,49 |
| 114 | – | 4,98 | 5,52 | 6,07 | 6,87 | 7,68 | 8,21 | 8,74 | 9,54 | 10,33 | 10,8 | 12,15 |
| 133 | – | 5,82 | 6,46 | 7,1 | 8,05 | 8,99 | 9,62 | 10,2 | 11,1 | 12,11 | 12,7 | 14,26 |
| 140 | – | 6,13 | 6,81 | 7,48 | 8,48 | 9,47 | 10,14 | 10,8 | 11,7 | 12,76 | 13,4 | 15,04 |
| 159 | – | 6,67 | 7,4 | 8,13 | 9,22 | 10,3 | 11,02 | 11,7 | 12,8 | 13,89 | 14,6 | 16,37 |
Not presented dimensions of longitudinal pipe can be agreed individually.
Dimension tolerances are regulated by par. 6 of GOST 10704-91.
Mechanical properties
Mechanical properties of steel used for pipes (diameter 48-52 mm) of group A and B with or without heat treatment of weld seam meet the standards presented in the table:
| Steel grades | Tensile strength σв, N/mm2 (kgf/mm2), with outer pipe diameter, mm | Tensile strength σт N/mm2(kgf/mm2) | Percentage of elongation δ5, %, with outer pipe diameter, mm | |||
| up to 60 | above 60 | up to 60, with wall thickness | above 60 | |||
| more than 0,06 D | 0,06 D and less | |||||
| not less than | ||||||
| 08u | 294(30) | 264(27) | 176(18) | 7 | 16 | 25 |
| 08ps, 08kp | 314(32) | 294(30) | 176(18) | 6 | 15 | 23 |
| St1ps, St1kp, St1sp | 314(32) | 294(30) | 186(19) | 6 | 15 | 23 |
| 10kp, St2kp, 10ps, 10 | 333(34) | 314(32) | 176(18)- 196(20) | 6 | 15 | 23 |
| 15kp, 15ps, 20kp, 15 | 372(38) | 353(36) | 186(19)- 216(22) | 5 | 14 | 21 |
| St3kp, St3ps, St3sp | 392(40) | 372(38) | 196(20)- 216(22) | 5 | 13 | 20 |
| St4kp, St4ps, St4sp | 431(44) | 412(42) | 216(22) – 225(23) | 4 | 11 | 19 |
| 22Gu | – | 490(50) | 344(35) | – | – | 15 |
| 20F, 20-KSH, 06GB | – | 470 (48) | 265 (27) | – | – | 18 |
| 09G2S, 09GSFi etc. | – | 490 (50) | 323 (33) | – | – | 18 |
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 diameter | Package size, mm/packing scheme, (pcs) | Number of pieces in one package, pcs. | Total pipe length of 11,7 m length package l.m. | Package weight, kg, thickness variations | ||||
| 2 mm | 3 mm | 3,5 mm | 4 mm | 4,5 mm | ||||
| 48 | 528х464 (6-7-8-9-10-11-10-9-8-7-6) | 91 | 1065 | 2417 | 3545 | 4088 | ||
| 51 | 459х404 (5-6-7-8-9-8-7-6-5) | 61 | 714 | 1727 | 2534 | 2926 | ||
| 57 | 513х452 (5-6-7-8-9-8-7-6-5) | 61 | 714 | 1934 | 2855 | 3297 | 3733 | |
| 60 | 540х476 (5-6-7-8-9-8-7-6-5) | 61 | 714 | 2041 | 3012 | 3483 | 3954 | |
| 76 | 532х471 (4-5-6-7-6-5-4) | 37 | 432,9 | 2338 | 2710 | 3074 | ||
| 89 | 632х551,5 (4-5-6-7-6-5-4) | 37 | 432,9 | 2753 | 3195 | 3628 | ||
| 102 | 510х455 (3-4-5-4-3) | 19 | 222 | 1627 | 1890 | 2150 | ||
| 108 | 540х482 (3-4-5-4-3) | 19 | 222 | 1727 | 2005 | 2267 | ||
| 114 | 570х509 (3-4-5-4-3) | 19 | 222 | 2121 | 2401 | 2701 | ||
| 133 | 665х594 (4-5-6-5-4) | 24 | 280 | 3117 | 3566 | 4004 | ||
| 140 | 700х625 (3-4-5-4-3) | 19 | 222 | 2601 | 2979 | 3343 | ||
Description
Pipe products resulting from strip welding are called electric-welded. Round electric-welded pipe is also often called gas and water pipe, as it is widely used in heating, gas and water systems. With few exceptions, pipe manufacturers produce longitudinal electric-welded pipes. Round pipes of minor diameter can be produced thin-walled or casing thick-walled. The price on electric-welded pipe mainly depends on price and demand of hot-rolled strip.
Application field
Pipe products are used in different industrial spheres: machinery; furniture and metalware production; construction etc. However, the main application is transportation of liquid and gas substances: water for drinking and heating, hydrocarbon and other chemical agents. Pipeline systems are very efficient for liquid transportation because of their strong ability to withstand pressure up to 16 mPa.
Comparison
Longitudinal electric-welded pipes as per GOST 10705-80 and 10704-91 are also known as water and gas pipes. However, it is correct to say water and gas pipe in relation to the pipe GOST 3262-75. Water and gas pipe GOST 10704-91 in comparison to the pipe GOST 3262-75 has outer diameter dimensionality, rather than nominal bore dimensionality.
