Electric-welded straight-seam steel pipes. Longitudinal electric-welded steel pipes Electric-welded steel pipe GOST 10704 91

When manufacturing straight-seam pipes, pay attention to GOST 10704-91, which determines the assortment, and GOST 10705-80, as well as GOST 10706-76, the basic technical requirements for general-purpose pipes. Two welding technologies are determined by the presence of two GOSTs, namely electric arc welding and contact welding with high frequency currents.

In GOST 20295-85, various welding technologies are only mentioned, but are not directly discussed anywhere. It involves resistance welding with high-frequency currents GOST 10705-80, and applies to pipes with a diameter of 10-530 mm.

Large-diameter pipes from 428 to 1420 mm, manufactured by arc welding, are subject to GOST 10706-76. Electric arc welding is carried out with external reinforcement, which means that the pipe is welded in three passes: first, an intermediate seam, then an outer seam, and an inner seam is made for reinforcement. These two GOST standards for longitudinally welded pipes are very similar, but have significant differences.

Based on GOST 10706, small-diameter pipes can be welded with a transverse seam, and those with a diameter of 820 mm or more must have two longitudinal and one transverse seams. It also, unlike GOST 10705, regulates the chamfer at the ends of the pipe. There are also certain differences regarding the grades of steel allowed in the manufacture of pipes. According to GOST 10706-76, two main grades are allowed, these are ST.3 and ST.2, but GOST 10705-80 is no longer limited to two grades; used pipes are widely represented on the secondary market from higher quality steel grades 10 and 20. The production of pipes from steel grade 17GS and its analogues according to GOST 10705-80 and 10706-76 is not provided.

The visual characteristics of a seam from high-frequency welding are much higher than from electric arc welding; such a seam is narrower and almost invisible. Irregularities in the form of a non-smooth thickening in the seam zone are formed on the inner surface of the pipe, called burr. In some cases, the burr is flattened or ground, and the outer one is removed. After electric arc welding, the seam is wider. It is characterized by the presence of a reinforcement roller with a height of up to 5 mm, on both sides - internal and external.

1. GOST 10704-91: Straight-seam electric-welded steel pipes developed and introduced by the USSR Ministry of Metallurgy
DEVELOPERS V. P. Sokurenko, Ph.D. tech. sciences; V. M. Vorona, Ph.D. tech. sciences; P. N. Ivshin, Ph.D. tech. sciences; N. F. Kuzenko, V. F. Ganzina
2. APPROVED AND ENTERED INTO EFFECT by Resolution of the Committee of Standardization and Metrology of the USSR dated November 15, 1991 N 1743
3. INSTEAD GOST 10704-76
4. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

5. REPUBLICATION. December 1996

Assortment

Electrically welded steel line-weld tubes. Range

1. This standard establishes the range of steel electric-welded straight-seam pipes.

2. The dimensions of the pipes must correspond to the table. 1.

3. The following are made according to the length of the pipe:

unmeasured length:

  • with a diameter of up to 30 mm - at least 2 m;
  • with a diameter of St. 30 to 70 mm - at least 3 m;
  • with a diameter of St. 70 to 152 mm - at least 4 m;
  • with a diameter of St. 152 mm - not less than 5 m.

At the request of the consumer, pipes of groups A and B according to GOST 10705 with a diameter of over 152 mm are manufactured with a length of at least 10 m; pipes of all groups with a diameter of up to 70 mm - a length of at least 4 m;

measured length:

  • with a diameter of up to 70 mm - from 5 to 9 m;
  • with a diameter of St. 70 to 219 mm - from 6 to 9 m;
  • with a diameter of St. 219 to 426 mm - from 10 to 12 m.

Pipes with a diameter over 426 mm are manufactured only in unmeasured lengths. By agreement between the manufacturer and the consumer, pipes with a diameter of over 70 to 219 mm can be manufactured from 6 to 12 m;

a multiple length of at least 250 mm and not exceeding the lower limit established for measuring pipes. The allowance for each cut is set to 5 mm (unless another allowance is specified) and is included in each multiplicity.

Table 1

Outer diameter, mm
1,0 1,2 1,4 (1,5) 1,6 1,8 2,0 2,2 2,5 2,8 3,0
10 0,222 0,260 - - - - - - - - -
10,2 0,227 0,266 - - - - - - - - -
12 0,271 0,320 0,366 0,388 0,410 - - - - - -
13 0,296 0,349 0,401 0,425 0,450 - - - - - -
14 0,321 0,379 0,435 0,462 0,489 - - - - - -
(15) 0,345 0,408 0,470 0,499 0,529 - - - - - -
16 0,370 0,438 0,504 0,536 0,568 - - - - - -
(17) 0,395 0,468 0,539 0,573 0,608 - - - - - -
18 0,419 0,497 0,573 0,610 0,719 0,789 - - - - -
19 0,444 0,527 0,608 0,647 0,687 0,764 0,838 - - - -
20 0,469 0,556 0,642 0,684 0,726 0,808 0,888 - - - -
21,3 0,501 0,595 0,687 0,732 0,777 0,866 0,952 - - - -
22 0,518 0,616 0,711 0,758 0,805 0,897 0,986 - - - -
(23) 0,543 0,645 0,746 0,795 0,844 0,941 1,04 1,13 1,26 - -
24 0,567 0,675 0,780 0,832 0,884 0,985 1,09 1,18 1,33 - -
25 0,592 0,704 0,815 0,869 0,923 1,03 1,13 1,24 1,39 - -
26 0,617 0,734 0,849 0,906 0,963 1,07 1,18 1,29 1,45 -
27 0,641 0,764 0,884 0,943 1,00 1,12 1,23 1,35 1,51 -
28 0,666 0,793 0,918 0,980 1,04 1,16 1,28 1,40 1,57 -
30 0,715 0,852 0,987 1,05 1,12 1,25 1,38 1,51 1,70 -
32 0,765 0,911 1,06 1,13 1,20 1,34 1,48 1,62 1,82 2,02

Continuation of the table. 1

Outer diameter, mm Theoretical weight of 1 m of pipes, kg, with wall thickness, mm
1,0 1,2 1,4 (1,5) 1,6 1,8 2,0 2,2 2,5 2,8
33 0,789 0,941 1,09 1,17 1,24 1,38 1,53 1,67 1,88 2,09
33,7 - 0,962 1,12 1,19 1,27 1,42 1,56 1,71 1,92 2,13
35 - 1,00 1,16 1,24 1,32 1,47 1,63 1,78 2,00 2,22
36 - 1,03 1,19 1,28 1,36 1,52 1,68 1,83 2,07 2,29
38 - 1,09 1,26 1,35 1,44 1,61 1,78 1,94 2,19 2,43
40 - 1,15 1,33 1,42 1,52 1,70 1,87 2,05 2,31 2,57
42 - 1,21 1,40 1,50 1,59 1,78 1,97 2,16 2,44 2,71
44,5 - 1,28 1,49 1,59 1,69 1,90 2,10 2,29 2,59 2,88
45 - 1,30 1,51 1,61 1,71 1,92 2,12 2,32 2,62 2,91
48 - - 1,61 1,72 1,83 2,05 2,27 2,48 2,81 3,12
48,3 - - 1,62 1,73 1,84 2,06 2,28 2,50 2,82 3,14
51 - - 1,71 1,83 1,95 2,18 2,42 2,65 2,99 3,33
53 - - 1,78 1,91 2,03 2,27 2,52 2,76 3,11 3,47
54 - - 1,82 1,94 2,07 2,32 2,56 2,81 3,18 3,54
57 - - 1,92 2,05 2,19 2,45 2,71 2,97 3,36 3,74
60 - - 2,02 2,16 2,30 2,58 2,86 3,14 3,55 3,95
63,5 - - 2,14 2,29 2,44 2,74 3,03 3,33 3,76 4,19
70 - - 2,37 2,53 2,70 3,03 3,35 3,68 4,16 4,64
73 - - 2,47 2,64 2,82 3,16 3,50 3,84 4,35 4,85
76 - - 2,58 2,76 2,94 3,29 3,65 4,00 4,53 5,05
88 - - - - 3,21 3,60 4,00 4,38 4,96 5,54
89 - - - - 3,45 3,87 4,29 4,71 5,33 5,95
95 - - - - - - 4,59 - 5,70 -
102 - - - - - 4,45 4,93 5,41 6,13 6,85
108 - - - - - 4,71 5,23 5,74 6,50 7,26
114 - - - - - 4,98 5,52 6,07 6,87 7,68
127 - - - - - 5,56 6,17 6,77 7,68 8,58
133 - - - - - 5,82 6,46 7,10 8,05 8,99
140 - - - - - 6,13 6,81 7,48 8,48 9,47
152 - - - - - 6,67 7,40 8,13 9,22 10,30
159 - - - - - 6,98 7,74 8,51 9,65 10,79
168 - - - - - 7,38 8,19 9,00 10,20 11,41
177,8 - - - - - 7,81 8,67 9,53 10,81 12,08
180 - - - - - - - - - -
193,7 - - - - - - 9,46 10,39 11,79 13,18
219 - - - - - - - - 13,35 14,93
- - - - - - - - - -

Continuation of the table. 1

Outer diameter, mm Theoretical weight of 1 m of pipes, kg, with wall thickness, mm
3,0 3,2 3,5 3,8 4,0 4,5 5,0 5,5 6,0 7,0
26 - - - - - - - - - -
27 - - - - - - - - - -
28 - - - - - - - - - -
30 - - - - - - - - - -
32 2,15 - - - - - - - - -
33 2,22 - - - - - - - - -
33,7 2,27 - - - - - - - - -
35 2,37 - - - - - - - - -
36 2,44 - - - - - - - - -
38 2,59 - - - - - - - - -
40 2,74 - - - - - - - - -
42 2,89 - - - - - - - - -
44,5 3,07 - - - - - - - - -
45 3,11 - - - - - - - - -
48 3,33 3,54 3,84 - - - - - - -
48,3 3,35 3,56 3,87 - - - - - - -
51 3,55 3,77 4,10 - - - - - - -
53 3,70 3,93 4,27 - - - - - - -
54 3,77 4,01 4,36 - - - - - - -

Continuation of the table. 1

Outer diameter, mm Theoretical weight of 1 m of pipes, kg, with wall thickness, mm
3,0 3,2 3,5 3,8 4,0 4,5 5,0 5,5 6,0 7,0 8,0 9,0
57 4,00 4,25 4,62 - - - - - - - - -
60 4,22 4,48 4,88 5,27 - - - - - - - -
63,5 4,48 4,76 5,18 5,59 - - - - - - - -
70 4,96 5,27 5,74 6,20 6,51 - - - - - - -
73 5,18 5,51 6,00 6,48 6,81 - - - - - - -
76 5,40 5,75 6,26 6,26 7,10 7,93 8,75 9,56 - - - -
83 5,92 6,30 6,86 7,42 7,79 8,71 9,62 10,51 - - - -
89 6,36 6,77 7,38 7,98 8,38 9,38 10,36 11,33 - - - -
95 - 7,24 - - - - 11,10 - - - - -
102 7,32 7,80 8,50 9,20 9,67 10,82 11,96 13,09 - - - -
108 7,77 8,27 9,02 9,76 10,26 11,49 12,70 13,90 - - - -
114 8,21 8,74 9,54 10,33 10,85 12,15 13,44 14,72 - - - -
127 9,17 9,77 10,66 11,55 12,13 13,59 15,04 16,48 - - - -
133 9,62 10,24 11,18 12,11 12,73 14,26 15,78 17,29 - - - -
140 10,14 10,80 11,78 12,76 13,42 15,04 16,65 18,24 - - - -
152 11,02 11,74 12,82 13,89 14,60 16,37 18,13 19,87 - - - -
159 11,54 12,30 13,42 14,52 15,29 17,15 18,99 20,82 22,64 26,24 26,24 -
168 12,21 13,01 14,20 15,39 16,18 18,14 20,10 22,04 23,97 27,79 31,57 -
177,8 12,93 13,78 15,04 16,31 17,14 19,23 21,31 23,37 25,42 29,49 33,50 -
180 - - - - 17,36 - 21,58 - - - - -
193,7 14,11 15,03 16,42 17,80 18,71 21,00 23,27 25,53 27,77 32,23 36,64 -
219 15,98 17,03 18,60 20,17 21,21 23,80 26,39 28,96 31,52 36,60 41,63 46,61
244,5 17,87 19,04 20,80 22,56 23,72 26,63 29,53 32,42 35,42 41,00 46,66 52,27
273 - - 23,26 25,23 26,54 29,80 23,05 36,28 39,51 45,92 52,28 58,60

Continuation of the table. 1

Outer diameter, mm Theoretical weight of 1 m of pipes, kg, with wall thickness, mm
3,5 3,8 4,0 4,5 5,0 5,5 6,0 7,0 8,0 9,0
325 - - 31,67 35,57 39,46 43,34 47,20 54,90 62,54 70,14
355,6 - - 34,68 38,96 43,23 47,49 51,73 60,18 68,58 76,93
377 - - 36,79 41,34 45,87 50,39 54,90 63,87 72,80 81,68
406,4 - - 39,70 44,60 49,50 54,38 59,25 68,95 78,60 88,20
426 - - 41,63 46,78 51,91 57,04 62,15 72,33 82,47 92,55
(478) - - - - 58,32 64,09 69,84 81,31 92,73 104,10
530 - - - - 64,74 71,14 77,54 90,29 102,99 115,64
630 - - - - - - - 107,55 122,72 137,83
720 - - - - - - - 123,09 140,47 157,81
820 - - - - - - - 140,35 160,20 180,00
920 - - - - - - - 157,61 179,93 202,20
1020 - - - - - - - - 199,66 224,39
1120 - - - - - - - - 219,39 246,59
1220 - - - - - - - - - 268,79
1420 - - - - - - - - - -

Continuation of the table. 1

External
dia-
meter, mm 		Theoretical weight of 1 m of pipes, kg, with wall thickness, mm
10 11 12 13 14 16 (17) 17,5 18 19 20
325 - - - - - - - - - - -
355,6 85,23 - - - - - - - - - -
377 90,51 - - - - - - - - - -
406,4 97,76 107,26 116,72 - - - - - - - -
426 102,59 112,58 122,52 - - - - - - - -
(478) 115,42 126,69 137,91 - - - - - - - -
530 128,24 140,79 153,30 165,75 178,15 202,82 215,07 221,18 227,28 239,44 251,55
630 152,90 167,92 182,89 197,81 212,68 242,27 257,00 264,34 271,67 286,30 300,87
720 175,10 192,33 209,52 226,66 243,75 277,79 294,73 303,18 311,62 328,47 345,26
820 199,76 219,46 239,12 258,72 278,28 317,25 336,65 346,34 356,01 375,32 394,58
920 224,42 246,59 268,71 290,78 312,81 356,70 378,58 389,50 400,40 422,18 443,91
1020 249,08 273,72 298,31 322,84 347,33 396,16 420,50 432,65 444,79 469,04 493,23
1120 273,74 300,85 327,90 354,90 381,86 435,62 462,43 475,81 481,19 515,89 542,55
1220 298,40 327,97 357,49 386,96 416,38 475,08 504,35 518,97 533,58 562,75 591,88
1420 347,73 382,23 416,68 451,08 485,44 554,00 588,20 605,29 622,36 656,46 690,52

Continuation of the table. 1

Outer diameter, mm Theoretical weight of 1 m of pipes, kg, with wall thickness, mm
21 22 23 24 25 26 27 28 29 30 31 32
530 263,61 275,62 287,58 299,49 - - - - - - - -
630 - - - - - - - - - - - -
720 362,01 378,70 395,35 411,95 411,95 428,49 444,99 461,44 477,84 510,49 - -
820 413,79 432,96 452,07 471,13 490,15 509,11 528,03 546,89 565,71 584,48 - -
920 - - - - - - - - - - - -
1020 517,37 541,47 565,51 589,51 613,45 637,35 661,20 685,00 708,75 732,45 756,10 779,70
1120 - - - - - - - - - - - -
1220 - - - - - - - - - - - -
1420 - - - - - - - - - - - -

Notes:
1. When manufacturing pipes in accordance with GOST 10706, the theoretical weight increases by 1% due to the strengthening of the seam.
2. By agreement between the manufacturer and the consumer, pipes with dimensions of 41.5x1.5-3.0 are manufactured; 43x1.0; 1.5-3.0; 43.5x1.5-3.0; 52x2.5; 69.6x1.8; 111.8x2.3; 146.1x5.3; 6.5; 7.0; 7.7; 8.5; 9.5; 10.7; 152.4x1.9; 2.65; 168x2.65; 177.3x1.9; 198x2.8; 203x2.65; 299x4.0; 530x7.5; 720x7.5; 820x8.5; 1020x9.5; 15.5; 1220x13.5; 14.6; 15.2 mm, as well as with intermediate wall thickness and diameters within the limits of the table. 1.
3. Pipe sizes enclosed in brackets are not recommended for new design.
3.1. Pipes of measured and multiple lengths are manufactured in two length accuracy classes:
I - with cutting ends and deburring;
II - without facing and deburring (with cutting in the mill line).
3.2. Maximum deviations along the length of measuring pipes are given in table. 2.

table 2

3.3. Maximum deviations along the total length of multiple pipes should not exceed:
+ 15 mm - for pipes of class I accuracy;
+ 100 mm - for pipes of class II accuracy.
3.4. At the consumer's request, pipes of measured and multiple lengths of class II accuracy must have ends with flanged ends on one or both sides.
4. Maximum deviations for the outer diameter of the pipe are given in table. 3.

Table 3

Outer diameter of pipes, mm

Limit deviations in outer diameter with precision manufacturing

ordinary

increased

From 10 to 30 incl.

Note. For diameters controlled by perimeter measurements, the largest and smallest perimeter limits are rounded to the nearest 1 mm.
5. At the request of the consumer, pipes in accordance with GOST 10705 are manufactured with a one-sided or offset tolerance on the outer diameter. One-sided or shifted tolerance should not exceed the sum of the maximum deviations given in table. 3.
6. Maximum deviations in wall thickness must correspond to:
± 10% - for pipe diameters up to 152 mm;
GOST 19903 - for pipe diameters over 152 mm for the maximum sheet width of normal accuracy.
By agreement between the consumer and the manufacturer, it is allowed to manufacture pipes with a one-sided tolerance for wall thickness, while the one-sided tolerance should not exceed the sum of the maximum deviations for wall thickness.
7. For pipes with a diameter of over 76 mm, a thickening of the wall at the burr by 0.15 mm is allowed.
8. Pipes for pipelines with a diameter of 478 mm and more, manufactured in accordance with GOST 10706, are supplied with maximum deviations for the outer diameter of the ends given in table. 4.

Table 4

9. The out-of-roundness and uniformity of pipes with a diameter of up to 530 mm inclusive, manufactured in accordance with GOST 10705, must be no more than the maximum deviations for the outer diameter and wall thickness, respectively.
Pipes with a diameter of 478 mm or more, manufactured in accordance with GOST 10706, must be of three accuracy classes for ovality. The ovality of the pipe ends should not exceed:
1% of the outer diameter of pipes for 1st accuracy class;
1.5% of the outer diameter of pipes for 2nd accuracy class;
2% of the outer diameter of pipes for 3rd accuracy class.
The ovality of the ends of pipes with a wall thickness of less than 0.01 outer diameter is established by agreement between the manufacturer and the consumer.
10. The curvature of pipes manufactured according to GOST 10705 should not exceed 1.5 mm per 1 m of length. At the request of the consumer, the curvature of pipes with a diameter of up to 152 mm should be no more than 1 mm per 1 m of length.
The total curvature of pipes manufactured in accordance with GOST 10706 should not exceed 0.2% of the pipe length. The curvature per 1 m length of such pipes is not determined.11. Technical requirements must comply with GOST 10705 and GOST 10706.

Examples of symbols:
Pipe with an outer diameter of 76 mm, a wall thickness of 3 mm, measured length, class II accuracy in length, made of steel grade StZsp, manufactured according to group B of GOST 10705-80:

Pipe 76 x 3 x 5000 IIGOST 10704-91
V - St3spGOST 10705-80

The same, with increased accuracy in outer diameter, length multiple of 2000 mm, class I accuracy in length, from grade 20 steel, manufactured according to group B of GOST 10705-80:

Pipe 76n x 3 x 2000cr. IGOST 10704-91
B - 20GOST 10705 - 80

Pipe with an outer diameter of 25 mm, a wall thickness of 2 mm, a length multiple of 2000 mm, class II length accuracy, manufactured according to group D GOST 10705-80;

Pipe 25 x 2 x 2000 cr. IIGOST 10704-91
DGOST 10705 - 80

Pipe with an outer diameter of 1020 mm, increased manufacturing accuracy, wall thickness 12 mm, increased accuracy in the outer diameter of the ends, 2nd class accuracy in ovality, unmeasured length, made of steel grade StZsp, manufactured according to group B GOST 10706 -76

Pipe 1020 n x 12 - Fri - 02 kpGOST 10704 - 91
V - St3spGOST 10706 - 76

Note. In the symbols of pipes that have undergone heat treatment throughout the entire volume, the letter T is added after the words “pipe”; pipes that have undergone local heat treatment of the weld, the letter L is added.

3.3. Maximum deviations along the total length of multiple pipes should not exceed:

+ 15 mm - for pipes of class I accuracy;
+100 mm - for pipes of class II accuracy.

3.4. At the consumer's request, pipes of measured and multiple lengths of class II accuracy must have ends with flanged ends on one or both sides.

4. Maximum deviations for the outer diameter of the pipe are given in Table 3.

Table 3.

Note: For diameters controlled by perimeter measurements, the largest and smallest perimeter limits are rounded to the nearest 1 mm.

5. At the request of the consumer, pipes in accordance with GOST 10705 are manufactured with a one-sided or offset tolerance on the outer diameter. One-sided or shifted tolerance should not exceed the sum of the maximum deviations given in table. 3.

6. Maximum deviations in wall thickness must correspond to: ± 10% - for pipe diameters up to 152 mm; GOST 19903 - for pipe diameters over 152 mm for the maximum sheet width of normal accuracy.
By agreement between the consumer and the manufacturer, it is allowed to manufacture pipes with a one-sided tolerance for wall thickness, while the one-sided tolerance should not exceed the sum of the maximum deviations for wall thickness.

7. For pipes with a diameter of over 76 mm, a thickening of the wall at the burr by 0.15 mm is allowed.

8. Pipes for pipelines with a diameter of 478 mm and more, manufactured in accordance with GOST 10706, are supplied with maximum deviations for the outer diameter of the ends given in table. 4.

9. The out-of-roundness and uniformity of pipes with a diameter of up to 530 mm inclusive, manufactured in accordance with GOST 10705, must be no more than the maximum deviations for the outer diameter and wall thickness, respectively.
Pipes with a diameter of 478 mm or more, manufactured in accordance with GOST 10706-76, must be of three accuracy classes for ovality. The ovality of the pipe ends should not exceed:

1% of the outer diameter of pipes for 1st accuracy class;
1.5% of the outer diameter of pipes for 2nd accuracy class;
2% of the outer diameter of pipes for 3rd accuracy class.

The ovality of the ends of pipes with a wall thickness of less than 0.01 outer diameter is established by agreement between the manufacturer and the consumer.

10. The curvature of pipes manufactured according to GOST 10705 should not exceed 1.5 mm per 1 m of length. At the request of the consumer, the curvature of pipes with a diameter of up to 152 mm should be no more than 1 mm per 1 m of length.
The total curvature of pipes manufactured in accordance with GOST 10706 should not exceed 0.2% of the pipe length. The curvature per 1 m length of such pipes is not determined.

11. Technical requirements must comply with GOST 10705 and GOST 10706.

Steel electric-welded pipe products are used in the oil and gas industry, energy, mechanical engineering and housing and communal services. We deliver throughout Russia and the CIS countries. Our company offers customers products in accordance with the standard establishing a list of electric-welded steel straight-seam products.

The range of pipes in accordance with GOST 10704 91 includes equipment of unmeasured length 2-5 m with a diameter from 30 to 152 mm or more. We manufacture products of groups A, B according to state standard 10705 according to customer requirements. With a diameter of 152 mm, its length can be at least 10 m. The measured length varies from 5 to 12 m, the multiplicity ranges from 250 mm.

The range of pipes GOST 10704 91 multiples and measured values ​​can be ordered in two accuracy classes: with cutting and deburring, without deburring and trimming. Please note that maximum deviations cannot exceed +15 and +100 mm for categories I and II, respectively.

When placing an order with our company, clients can be sure that their wishes will be taken into account. Thus, if necessary, products are manufactured with a one-sided/offset tolerance on the outer diameter.

Main parameters of pipe assortment GOST 10704 91:

  • a product with a diameter of more than 76 mm may have thickening of the walls at the burr by 0.15 mm;
  • components for pipelines with a width of 478 mm or more may have deviations at the ends (external size) +/- 1.5-4;
  • the curvature per 1 m does not exceed the permissible 1.5 mm.

There are also three accuracy classes based on the ovality parameter; for the first class it cannot exceed 1% of the external size, for the second - 1.5%, and for the third - 2%. If the wall thickness is less than 0.01% of the outer diameter, then the ovality will be established by agreement between the manufacturer and the customer, the pipe range in accordance with GOST 10704 91. To clarify the price for the product you are interested in, send a letter to the e-mail box, or call the indicated numbers.

TC "UPSK" supplies the entire range of rolled pipes (seamless hot-rolled and cold-rolled pipes, electric-welded pipes, large-diameter pipes, shell pipes, profile pipes), as well as pipeline connecting parts (bends, tees, reducers, flanges, plugs) in Chelyabinsk.

Constant availability in Chelyabinsk.

Availability of railway tracks, delivery by railway and road transport to all regions of Russia and the CIS.

Discounts, convenient form of payment, deferred payment.

Electric-welded steel pipes GOST 10704-91 are the most widely used among all pipe products. They are used in a wide variety of sectors of the economy and industry, and not only for laying pipelines for various purposes, but also in the construction industry and for the manufacture of various structures, products and their parts. Therefore, the range and characteristics of these pipes are of interest to a very wide range of consumers of pipe products.

1

Perhaps the first thing anyone who wants to get acquainted with the range and characteristics of products of standard 10704 needs to know is the following. Since its development (judging by the standard number, this is 1991) and its entry into force in 1993, many changes have been made to this GOST, affecting both the range of pipes produced (diameters and wall thicknesses were added) and some of their parameters .

Electric welded pipe GOST 10704 91

Therefore, when searching for GOST 10704 on the Internet or other sources, you should pay attention to the presence of these same changes in the material found. They usually come in the form of an appendix or are already included in the text, about which there should be appropriate comments. Otherwise, you will have to deal with outdated and partly distorted information. This, by the way, applies to all other GOST standards, especially if they are older than 5–10 years.

In this article, all information about pipes of standard 10704 is given in their latest edition. That is, taking into account all the changes made to this GOST over the entire period of its existence and use.

Now about what else it is advisable to know before becoming familiar with standard 10704. This GOST, as many people know, contains the assortment (list of manufactured standard sizes) and the main characteristics: dimensions, weight, permissible deviations from them and similar information. And the technical conditions (requirements) for production (classification according to quality indicators, steel grades, mechanical and other properties, and so on) are not specified. They are given immediately in 2 other standards: 10705-80 and 10706-76.

Moreover, each of them actually sets technical requirements for the production of its own separate type of pipes. But at the same time, the range and dimensions of products produced in accordance with both GOSTs must necessarily comply with the requirements of the standard 10704 in question. And in it, in turn, there are references to documents 10705 and 10706. They are given when the pipe has some characteristics described in GOST 10704 depend on the specific technical conditions it is manufactured according to. This point should also be known and taken into account when familiarizing yourself with standard 10704.

2

The dimensions (range) of pipes produced according to standard 10704 must correspond to the data specified in Table given at the end of the article. 5. It also gives the theoretical weight of 1 meter for each standard size of products. Moreover, this mass is indicated for pipes produced. If manufactured according to standard 10706, the theoretical weight will be 1% more, due to the reinforced seam.

In addition to those given in Table 5, standard 10704 allows the manufacture of pipes of a number of other sizes, which are listed in the note after the table. In the latter, it should be noted, there are sizes enclosed in brackets. Standard 10704 does not recommend their use in any new designs.

In straight-seam pipes, the seam is located along the product along its entire length

According to the length, welded products of this GOST are produced in three main types. Namely: unmeasured, multiple and measured lengths. All these types of pipes have their own specific requirements. Unmeasured products are produced with a diameter (mm) and must be length (m):

  • up to 30 mm – length at least 2 m;
  • over 30 to 70 – minimum 3 m;
  • over 70 to 152 – minimum 4 m;
  • over 152 – not less than 5 m.

Unmeasured products of groups A and B with a diameter greater than 152 mm, manufactured according to standard 10705, upon request of the consumer (customer), are produced with a length of at least 10 m. And products of all groups with a size of up to 70 mm, upon request, are made with a length of no shorter than 4 m.

Pipes of different diameters

Measured products are produced with a diameter (mm) and should be length (m):

  • if up to 70 mm – then the length is within 5–9 m;
  • over 70 to 219 – 6–9 m;
  • over 219 to 630 – 10–12 m.

Tubular products with a diameter of more than 630 mm are produced unmeasured. By agreement between the manufacturer and the ordering party, it is allowed to produce measured products with a length of up to 12 m - when its diameter is over 70 and inclusive up to 219 mm, and also up to 18 m - if more than 219 mm up to 630 mm.

Multiple-length pipes are produced with a multiplicity of at least 250 mm, which must not exceed the lower limit (total length) regulated for measured products. Each cut is made with an allowance of 5 mm (unless otherwise specified). The allowance is included (taken into account) in each multiple.

Straight-seam pipes for gas supply

Welded pipe products are divided into 2 classes based on the manufacturer’s accuracy of maintaining their length. Moreover, this division applies only to products of multiple and measured lengths. The designation and characteristics of these classes are as follows:

  • I – the ends of the pipe are trimmed and then deburred;
  • II – trimming and subsequent deburring are not performed (cutting of the product is done in the mill line).

3 Permissible deviations from dimensions and lengths and other requirements

In terms of total length, the maximum deviations of multiple products of class I accuracy should not exceed +15 mm, and class II. – +100 mm. Maximum deviations in the length of measured pipe products are given in Table. 1 (also by class).

Table 1

At the request of the party ordering the pipes, the ends of measured and multiple products of class II accuracy are trimmed by the manufacturer on one or both sides.

According to the outer diameter, the maximum deviations of pipes are given in Table. 2 (in terms of manufacturing accuracy of products).

table 2

Note. If the diameter of the pipe is controlled by measuring its perimeter, then the limit values ​​of the latter (smallest and largest) should be rounded to the nearest 1 mm.

According to standard 10704, at the request of the consumer, products manufactured in accordance with GOST 10705 are allowed to be produced with a biased or one-sided tolerance on the outer diameter. But such a deviation should not be greater than the sum of the tolerances Table. 2.

Electric welded steel pipes

Tolerances for the wall thickness of pipe metal products must meet the following requirements:

  • for products with an outer diameter of 152 mm and less – ±10%;
  • when the diameter of tubular products is more than 152 to 1020 mm and when for its production, rolled sheets of maximum width were used, produced with normal accuracy - in accordance with GOST 19903;
  • over 1020 – according to Table. 3 below.

Table 3

Standard 10704 allows, upon agreement on this issue between the customer and the manufacturer, the production of pipe products with a one-sided tolerance on the size of the wall thickness. But such a deviation should not be greater than the sum of the tolerances given above. For products with a diameter exceeding 76 mm, it is permissible to thicken the wall directly at the burr in excess of the permissible maximum deviations, but only by 0.15 mm.

Pipes manufactured according to standard

Products for pipelines with a diameter of 478 mm and larger, manufactured according to standard 10706, are subject to additional requirements for the diameter of the ends. The outer diameter of the latter should not differ from the nominal size of the pipe by an amount greater than those indicated in Table. 4 maximum deviations.

Table 4

Also, standard 10704 contains requirements for equal thickness and ovality of welded pipe products manufactured according to it. For products manufactured in accordance with GOST 10705, with an outer diameter of up to 630 mm inclusive, they must be within (not more than) the tolerances for the outer size and wall thickness, respectively.

Products with a diameter starting from 478 mm and larger, manufactured according to standard 10706, must necessarily have 3 accuracy classes in terms of ovality. Thus, the ovality of the ends of these pipe products should not exceed the following values:

  • for pipes of 1st accuracy class – 1% of the outer diameter of the product;
  • 2 classes – 1.5%;
  • 3rd grade – 2%.

The ovality of the ends of products with a wall thickness less than 0.01 of the outer diameter must be established by agreement between the manufacturer and the customer.

The curvature of products manufactured according to standard 10705 should not exceed 1.5 mm in any 1 m of their length. For products of this GOST with a diameter up to and including 152 mm, the customer may require the manufacturer to comply with the curvature for any 1 m of length within a range of no more than 1 mm.

For products manufactured according to standard 10706, only the overall curvature is regulated - for the entire length of the pipe. It is limited to 0.2% of the length of the product. The curvature for 1 m of these pipes is not regulated.

Table 5

Pipe diameter, mm

Continuation of the table. 5

Pipe diameter, mm

Theoretical weight of 1 m of pipes, kg, with wall thickness, mm

Continuation of the table. 5

Pipe diameter, mm

Theoretical weight of 1 m of pipes, kg, with wall thickness, mm
119,01 124,78

Continuation of the table. 5

Pipe diameter, mm

Theoretical weight of 1 m of pipes, kg, with wall thickness, mm
102,54 106,88
130,50 136,17
157,43 164,38
173,28 180,98
184,36 192,59
199,58 208,54
209,73 219,18

Note:

  1. Blank columns in the table mean that the pipe is not produced with these dimensions.
  2. By agreement between the customer and the manufacturer, it is possible to manufacture pipes with dimensions: 41.5x1.5–3.0; 43x1.0 and 1.5–3.0; 43.5x1.5–3.0; 52x2.5; 69.6x1.8; 111.8x2.3; 146.1x5.3, 6.5, 7.0, 7.7, 8.5, 9.5 and 10.7; 152.4x1.9 and 2.65; 168x2.65; 177.3x1.9; 198x2.8; 203x2.65; 299x4.0; 530x7.5; 820x8.5; 1020x9.5 and 15.5; 1220x13.5, 14.6 and 15.2 mm, as well as with intermediate diameters and wall thicknesses within their values ​​​​in the table. 5.

According to the length of the pipe they are made:

unmeasured length:

  • with a diameter of up to 30 mm................................................not less than 2m;
  • with a diameter over 30 to 70 mm................................. not less than 3 m;
  • with a diameter over 70 to 152 mm............................. not less than 4 m;
  • with a diameter over 152 mm.................................... not less than 5 m;

notes

At the request of the consumer, pipes of groups A and B according to GOST 10705 with a diameter of over 152 mm are manufactured with a length of at least 10 m.

At the request of the consumer, pipes of all groups with a diameter of up to 70 mm are manufactured with a length of at least 4 m.

measured length:

  • with a diameter of up to 70 mm...................................from 5 to 9 m;
  • with a diameter over 70 to 219 mm.............................from 6 to 9 m;
  • with a diameter over 219 to 426 mm.............................from 10 to 12 m;

notes

Pipes with a diameter over 426 mm are manufactured only in unmeasured lengths.

By agreement between the manufacturer and the consumer, pipes with a diameter of over 70 to 219 mm can be manufactured from 6 to 12 m.

multiple length

A multiple of at least 250 mm and not exceeding the lower limit established for measuring pipes. The allowance for each cut is set at 5 mm (unless another allowance is specified) and is included in each multiplicity.

notes

When manufacturing pipes in accordance with GOST 10706, the theoretical weight increases by 1% due to the strengthening of the seam.

By agreement between the manufacturer and the consumer, pipes are manufactured with dimensions: 41.5x1.5-3.0; 43x1.0; 1.5-3.0; 43.5x1.5-3.0; 52x2.5; 69.6x1.8; 111.8x2.3; 146.1x5.3; 6.5; 7.0; 7.7; 8.5; 9.5; 10.7; 152.4x1.9; 2.65; 168x2.65; 177.3x1.9; 198x2.8; 203x2.65; 299x4.0; 530x7.5; 720x7.5; 820x8.5; 1020x9.5; 15.5; 1220x13.5; 14.6; 15.2mm, as well as intermediate wall thicknesses and diameters within the values ​​given in the tables on the pages below.

GOST 10704-91 for pipe diameter:

Note.

Pipe sizes enclosed in brackets are not recommended for use in new designs.

Pipes of measured and multiple lengths are manufactured two accuracy classes by lenght:

  • I- with cutting ends and deburring;
  • II- without facing and deburring (with cutting in line).

Examples of symbols

Pipe with an outer diameter of 76 mm, a wall thickness of 3 mm, measured length, length accuracy class II, made of steel grade St3sp, manufactured according to group B of GOST 10705:

Pipe with an outer diameter of 76 mm, a wall thickness of 3 mm, increased accuracy in outer diameter, a long multiple of 2000 mm, accuracy class in length I, from steel grade 20, manufactured according to group B of GOST 10705:

Pipe with an outer diameter of 25 mm, a wall thickness of 2 mm, a multiple of 2000 mm in length, length accuracy class II, manufactured according to group D of GOST 10705:

Pipe with an outer diameter of 1020 mm, increased manufacturing accuracy, wall thickness 12 mm, increased accuracy in the outer diameter of the ends, 2nd class accuracy in ovality, unmeasured length, made of steel grade St3sp, manufactured according to group B of GOST 10705:

When designating pipes that have undergone heat treatment throughout the entire volume, the letter T is added after the words “pipe”, and the letter L is added to pipes that have undergone local heat treatment of the weld.

INTERSTATE STANDARD

ASSORTMENT

Official publication

Standardinform

UDC 669.14-462.2:621.791:006.354

INTERSTATE

Group B62 STANDARD

ELECTRIC-WELDED STRAIGHT-WELMED STEEL PIPES

Assortment

Electrically welded steel line-weld tubes. Range

ISS 23.040.10

OKU 13 7300, 13 8100, 13 8300

Date of introduction 01/01/93

1. This standard establishes the range of straight-seam electric welded steel

2. The dimensions of the pipes must correspond to the table. 1.

3. According to the length of the pipe, they are made: of unmeasured length:

with a diameter of up to 30 mm - at least 2 m; with a diameter of St. 30 to 70 mm - at least 3 m; with a diameter of St. 70 to 152 mm - at least 4 m; with a diameter of St. 152 mm - not less than 5 m.

At the request of the consumer, pipes of groups A and B according to GOST 10705 with a diameter of over 152 mm are manufactured with a length of at least 10 m; pipes of all groups with a diameter of up to 70 mm - a length of at least 4 m; measured length:

with a diameter of up to 70 mm - from 5 to 9 m;

with a diameter of St. 70 to 219 mm - from 6 to 9 m;

with a diameter of St. 219 to 426 mm - from 10 to 12 m.

Pipes with a diameter over 426 mm are manufactured only in unmeasured lengths. By agreement between the manufacturer and the consumer, pipes with a diameter of over 70 to 219 mm can be manufactured from 6 to 12 m;

a multiple length of at least 250 mm and not exceeding the lower limit established for measuring pipes. The allowance for each cut is set to 5 mm (unless another allowance is specified) and is included in each multiplicity.

Official publication Reproduction prohibited

© Standards Publishing House, 1991 © Standartinform, 2007

Table 1

Outer diameter, mm

Theoretical mass 1 iv

with wall thickness, mm

Continuation of the table. 1

Outer

Continuation of the table. 1

Outer

Theoretical weight of 1 m of pipes, kg, with wall thickness, mm

Continuation of the table. 1

Outer

Theoretical weight of 1 m of pipes, kg, with wall thickness

diameter, mm

Continuation of the table. 1

Outer

Theoretical mass

1 m of pipes, kg, with wall thickness, mm

diameter, mm

Continuation of the table. 1

Outer

Theoretical weight of 1 m of pipes, kg, with wall thickness, mm

Continuation of the table. 1

Outer

Theoretical weight of 1 m of pipes, kg,

with wall thickness, mm

diameter, mm

Continuation of the table. 1

Outer

Theoretical weight of 1 m of pipes, kg, with wall thickness, mm

diameter, mm

Notes:

1. When manufacturing pipes in accordance with GOST 10706, the theoretical weight increases by 1% due to the strengthening of the seam.

2. By agreement between the manufacturer and the consumer, pipes with dimensions of 41.5x1.5-3.0 are manufactured; 43x1.0; 1.5-3.0; 43.5x1.5- 3.0; 52x2.5; 69.6x1.8; 111.8x2.3; 146.1x5.3; 6.5; 7.0; 7.7; 8.5; 9.5; 10.7; 152.4x1.9; 2.65; 168x2.65; 177.3x1.9; 198x2.8; 203x2.65; 299x4.0; 530x7.5; 720x7.5; 820x8.5; 1020x9.5; 15.5; 1220x13.5; 14.6; 15.2 mm, as well as with intermediate wall thickness and diameters within the limits of the table. 1.

3. Pipe sizes enclosed in brackets are not recommended for new design.

3.1. Pipes of measured and multiple lengths are manufactured in two length accuracy classes;

I - with cutting ends and deburring;

II - without facing and deburring (with cutting in the mill line).

3.2. Maximum deviations along the length of measuring pipes are given in table. 2.

table 2

3.3. Maximum deviations along the total length of multiple pipes should not exceed;

15 mm - for pipes of class I accuracy;

100 mm - for pipes of class II accuracy.

3.4. At the consumer's request, pipes of measured and multiple lengths of class II accuracy must have ends with flanged ends on one or both sides.

4. Maximum deviations for the outer diameter of the pipe are given in table. 3.

Table 3

Note. For diameters controlled by perimeter measurements, the largest and smallest perimeter limits are rounded to the nearest 1 mm.

5. At the request of the consumer, pipes in accordance with GOST 10705 are manufactured with a one-sided or offset tolerance on the outer diameter. One-sided or shifted tolerance should not exceed the sum of the maximum deviations given in table. 3.

6. Maximum deviations in wall thickness must correspond to:

±10% - for pipe diameters up to 152 mm;

GOST 19903 - for pipe diameters over 152 mm for the maximum sheet width of normal accuracy.

By agreement between the consumer and the manufacturer, it is allowed to manufacture pipes with a one-sided tolerance for wall thickness, while the one-sided tolerance should not exceed the sum of the maximum deviations for wall thickness.

7. For pipes with a diameter of over 76 mm, a thickening of the wall at the burr by 0.15 mm is allowed.

8. Pipes for pipelines with a diameter of 478 mm and more, manufactured in accordance with GOST 10706, are supplied with maximum deviations for the outer diameter of the ends given in table. 4.

Table 4

9. Ovality and equal wall thickness of pipes with a diameter of up to 530 mm inclusive, manufactured in accordance with GOST 10705, must be no more than the maximum deviations for the outer diameter and wall thickness, respectively.

Pipes with a diameter of 478 mm or more, manufactured in accordance with GOST 10706, must be of three accuracy classes for ovality. The ovality of the pipe ends should not exceed:

1% of the outer diameter of pipes for 1st accuracy class;

1.5% of the outer diameter of pipes for 2nd accuracy class;

2% of the outer diameter of pipes for 3rd accuracy class.

The ovality of the ends of pipes with a wall thickness of less than 0.01 outer diameter is established by agreement between the manufacturer and the consumer.

10. The curvature of pipes manufactured according to GOST 10705 should not exceed 1.5 mm per 1 m of length. At the request of the consumer, the curvature of pipes with a diameter of up to 152 mm should be no more than 1 mm per 1 m of length.

The total curvature of pipes manufactured in accordance with GOST 10706 should not exceed 0.2% of the pipe length. The curvature per 1 m length of such pipes is not determined.

11. Technical requirements must comply with GOST 10705 and GOST 10706.

Examples of symbols

Pipe with an outer diameter of 76 mm, a wall thickness of 3 mm, measured length, class II accuracy in length, made of steel grade StZsp, manufactured according to group B of GOST 10705-80:

76x3x5000 II GOST 10704-91 V-StZsp GOST 10705-80

The same, with increased accuracy in outer diameter, length multiple of 2000 mm, class I accuracy in length, from grade 20 steel, manufactured according to group B of GOST 10705-80:

t ba 76пхЗх2000 cr. I GOST 10704-91 B-20 GOST 10705-80

Pipe with an outer diameter of 25 mm, a wall thickness of 2 mm, a length multiple of 2000 mm, class II length accuracy, manufactured according to group D GOST 10705-80:

25x2x2000 cr. II GOST 10704-91 D GOST 10705-80

Pipe with an outer diameter of 1020 mm, increased manufacturing accuracy, wall thickness 12 mm, increased accuracy in the outer diameter of the ends, 2nd class accuracy in ovality, unmeasured length, made of steel grade StZsp, manufactured according to group B of GOST 10706-76:

„ - 1020пх12-ПТ-02кл GOST 10704-91

Pipe -

V-StZsp TOST 10706-76

Note: In the symbols of pipes that have undergone heat treatment throughout the entire volume, the letter T is added after the words “pipe”; For pipes that have undergone local heat treatment of the weld, the letter L is added.

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the USSR Ministry of Metallurgy DEVELOPERS

V.P. Sokurenko, Ph.D. tech. sciences; V.M. Vorona, Ph.D. tech. sciences; P.N. Ivshin, Ph.D. tech. sciences; N. F. Kuzenko, V. F. Ganzina

2. APPROVED AND ENTERED INTO EFFECT by Resolution of the Committee for Standardization and Metrology of the USSR dated November 15, 1991 No. 1743

3. INSTEAD GOST 10704-76

4. REFERENCE REGULATIVE AND TECHNICAL DOCUMENTS

5. REPUBLICATION. February 2007

Editor L.I. Nakhimova Technical editor L.A. Guseva Proofreader A. S. Chernousova Computer layout V.I. Grishchenko

Signed for publication on March 14, 2007. Format 60x84"D. Offset paper. Times typeface. Offset printing. Printing condition l. 0.93.

Academician-ed.l. 0.90. Circulation 53 copies. Zach. 210. From 3790.

FSUE "Standartinform", 123995 Moscow, Granatny per., 4. Typed in FSUE "Standartinform" on a PC.

Printed in the branch of the Federal State Unitary Enterprise "Standartinform" - type "Moscow Printer", 105062 Moscow, Lyalin lane, 6.

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