GOST 8639 82 steel square pipes. Pipes of special sizes
1. This standard applies to seamless hot-formed and cold-formed steel pipes, electric-welded pipes, cold-formed electric-welded pipes, hot-calibrated electric-welded pipes, as well as pipes made by furnace welding.
2. The shape and dimensions of square pipes must correspond to those indicated in the drawing and in Table 1.
Table 1
|
Outer size BUT, mm |
Wall thickness s, mm |
Sectional area, cm 2 |
Weight |
Moment of inertia, cm 4 " |
Moment of resistance, cm 3 " |
|
|
I x = I y |
W x = W y |
|||||
|
Pipes of special sizes |
||||||
Notes:
1. Mass calculated at a steel density of 7.85 g/cm 3 .
2. The static characteristics of the pipes are calculated for R= 1.5s.
3. By agreement between the manufacturer and the consumer, it is allowed to manufacture pipes of other sizes.
Legend Examples
Pipes with an outer dimension of 40 mm, a wall thickness of 3 mm, a length that is a multiple of 1250 mm, made of steel grade 10, group B GOST 13663-86:
The same, measured length 6000 mm:
The same, random length:
3. Pipes are made:
External dimensions from 60 to 180 mm with wall thickness from 4.0 to 14.0 mm seamless hot-formed,
External dimensions from 10 to 120 mm with wall thickness from 1.0 to 8.0 mm seamless cold-formed,
External dimensions from 10 to 100 mm with wall thickness from 0.8 to 5.0 mm
External dimensions from 100 to 180 mm with wall thickness from 4.0 to 14.0 mm
External dimensions from 40 to 70 mm with a wall thickness of 3.0 to 5.0 mm by furnace welding.
4. Cornering radius R should be no more than 2 s.
By agreement between the manufacturer and the consumer, the radius of curvature should be no more than 1.5 s; for electric-welded pipes with outer dimensions of 20x20 mm and 25x25 mm with a wall thickness of 1.5 to 2.0 mm and pipes made by furnace welding - no more than 2.5 s, for electric-welded pipes 60´60´4 mm in size - no more than 3 s.
5. Pipes are made:
random length
seamless cold-formed - from 1.5 to 11 m,
electrowelded, electrowelded cold-formed - from 1.5 to 11 m,
electrowelded hot-calibrated - from 1.5 to 14 m,
furnace welding pipes - from 4 to 8 m;
measured length
seamless hot-formed - from 4 to 12.5 m,
seamless cold-formed - from 4.5 to 11 m,
electrowelded, electrowelded cold-formed,
electrowelded hot-calibrated - from 5 to 9 m,
furnace welding pipes - from 4 to 8 m.
Maximum deviation for the total length +100 mm;
length multiple dimensional
seamless hot-formed - from 4 to 12.5 m with an allowance for each cut of 5 mm,
seamless cold-formed - from 1.5 to 11 m with an allowance for each cut of 5 mm,
welded - any multiplicity, not exceeding lower limit set for measuring pipes.
The total length of the multiple pipes must not exceed the upper limit of the measured pipes. The allowance for each multiplicity is set at 5 mm (unless another allowance is specified in the order) and is included in each ordered multiplicity.
6. Limit deviations in external dimensions, wall thickness and concavity of the sides should not exceed those indicated in Table. 2.
table 2
|
Name of parameters |
Limit deviations of pipe dimensions |
|
|
normal |
high |
|
|
External dimensions: |
||
|
for seamless hot-formed pipes and furnace-welded pipes |
||
|
for seamless cold-formed, as well as electric-welded, cold-formed, electric-welded, hot-calibrated pipes up to 30 mm in size |
||
|
for seamless cold-formed, as well as electric-welded, electric-welded cold-formed, electric-welded hot-calibrated pipes with sizes over 30 to 50 mm |
||
|
for seamless cold-formed pipes, as well as electric-welded pipes, cold-formed electric-welded pipes, hot-calibrated electric-welded pipes larger than 50 mm |
||
|
Wall thickness: |
||
|
for hot-formed pipes |
||
|
for cold-formed pipes (seamless and electric-welded), as well as furnace-welded pipes: |
||
|
with wall thickness £ 3.5 mm |
||
|
for wall thickness > 3.5 mm |
||
|
for electric-welded and electric-welded hot-calibrated pipes |
||
|
Concave or convex sides: |
||
|
for seamless hot-formed pipes with sides of size: |
||
|
St. 50" 70mm |
||
|
» 70 » 100 mm |
||
|
for seamless cold-formed and welded pipes with side dimensions: |
||
|
St. 50 » 70 mm |
||
|
Twisting square and rectangular pipes: |
||
|
for welded and seamless hot-formed pipes, not more than |
By agreement between the manufacturer and the consumer |
|
|
for cold-formed pipes |
||
Note. By agreement between the manufacturer and the consumer, the pipes are manufactured with a shifted tolerance for outer dimensions and wall thickness. The value of the shifted tolerance field should not exceed the sum of the maximum deviations given in Table. 2.
(Revised edition, Rev. No. 1,).
7. The difference in wall thickness should not lead the wall beyond limit deviations along the wall thickness.
8. In the cross section of the pipe, the deviation from right angle must not exceed ±1.5°.
9. The curvature of the pipes should not exceed 2 mm per 1 m of length. At the request of the consumer, pipes are manufactured without straightening, while the norms for curvature are not regulated.
10.(Excluded, Change No. 1).
11. Technical requirements must comply with GOST 13663.
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of Ferrous Metallurgy of the USSR
DEVELOPERS
V. P. Sokurenko, cand. tech. sciences (topic leader); BUT. B. Petrushevskaya
2. APPROVED AND INTRODUCED Decree of the USSR State Committee for Standards dated April 14, 1982 No. 1529
4 REFERENCED REGULATORY DOCUMENTS
5. The limitation of the period of validity was removed by the Decree of the State Standard of 07.09.92 No. 1125
6. EDITION (December 2005) with amendments No. 1, 2, 3, approved in June 1987, November 1989, September 1992 (IUS 10-87, 2-90, 12-92)
1. This standard applies to seamless hot-formed and cold-formed steel, electric-welded and cold-formed electric-welded pipes.
2. The shape and dimensions of square pipes must correspond to those indicated on and in.
|
Outer size BUT, mm |
Wall thicknesss, mm |
Sectional area, cm2 |
Weight |
Moment of inertia, cm4» |
Moment of resistance, cm3» |
|
Pipes of special sizes |
|||||
Notes:
1. Mass calculated at a steel density of 7.85 g/cm3.
2. The static characteristics of the pipes are calculated for R= 1.5s.
Legend Examples
Pipes with an outer dimension of 40 mm, a wall thickness of 3 mm, a length that is a multiple of 1250 mm, made of steel grade 10, group B GOST 13663-86 :
The same, measured length 6000 mm:
The same, random length:
3. Pipes with outer dimensions from 10 to 120 mm with wall thickness from 1.0 to 8.0 mm are made cold-formed, pipes with outer dimensions from 60 to 180 mm with wall thickness from 4.0 to 14.0 mm are made hot-worked, pipes with outer dimensions from 10 to 100 mm wall thickness from 1.0 to 5.0 mm are made by electric welding.
2, 3.(Revised edition, Rev. No. 1).
4. Cornering radius R should be no more than 2s.
By agreement between the manufacturer and the consumer, the radius of curvature should be no more than 1.5 s, for electric-welded pipes with a size of 60´60´4 mm - no more than 3 s.
5. Pipes are made:
random length
seamless hot-formed - from 4 to 12.5 m,
seamless cold-formed and electric-welded - from 1.5 to 9 m;
measured length
seamless hot-formed - from 4 to 12.5 m;
seamless cold-formed - from 4.5 to 11 m;
electrowelded - from 5 to 9 m.
Maximum deviation for the total length +100 mm;
length multiple and dimensional
seamless hot-formed - from 4 to 12.5 m with an allowance for each cut of 5 mm;
seamless cold-formed - from 1.5 to 11 m with an allowance of 5 mm for each cut;
electric-welded - any multiplicity not exceeding the lower limit established for measured pipes.
The total length of the multiple pipes must not exceed the upper limit of the measured pipes. The allowance for each multiplicity is set at 5 mm (unless another allowance is specified in the order) and is included in each ordered multiplicity.
(Changed edition, Rev. No. 1, No. 3).
6. Limit deviations in external dimensions, wall thickness and concavity of the sides should not exceed those specified in.
|
Name of parameters |
Limit deviations of pipe dimensions |
|
|
normal |
high |
|
|
External dimensions: |
||
|
for seamless hot-formed pipes |
||
|
for seamless cold-formed and electric-welded pipes up to 30 mm in size |
||
|
for seamless cold-formed and electric-welded pipes with dimensions over 30 to 50 mm |
||
|
for seamless cold-formed and electric-welded pipes larger than 50 mm |
||
|
Wall thickness: |
||
|
for hot-formed pipes |
||
|
for cold-formed pipes (seamless and electric-welded): |
||
|
with wall thickness £ 3.5 mm |
||
|
for wall thickness > 3.5 mm |
||
|
for electric pipes |
||
|
Concave or convex sides: |
||
|
for seamless hot-formed pipes with sides of size: |
||
|
St. 50" 70mm |
||
|
» 70 » 100 mm |
||
|
for seamless cold-formed and electric-welded pipes with side dimensions: |
||
|
St. 50 » 70 mm |
||
|
Twisting square and rectangular pipes: |
||
|
for electric-welded and seamless hot-formed pipes, not more than |
By agreement between the manufacturer and the consumer |
|
|
for cold-formed pipes |
||
Note. By agreement between the manufacturer and the consumer, the pipes are manufactured with a shifted tolerance for outer dimensions and wall thickness. The value of the shifted tolerance field should not exceed the sum of the maximum deviations given in.
(Revised edition, Rev. No. 1).
7. The difference in wall thickness should not lead the wall beyond the limit deviations in wall thickness.
8. In the cross section of the pipe, the deviation from the right angle should not exceed ± 1.5 °.
9. The curvature of the pipes should not exceed 2 mm per 1 m of length. At the request of the consumer, pipes are manufactured without straightening, while the norms for curvature are not regulated.
10.(Excluded. Change No. 1).
11. Technical requirements must comply GOST 13663.
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of Ferrous Metallurgy of the USSR
DEVELOPERS
V. P. Sokurenko, cand. tech. sciences (topic leader); BUT. B. Petrushevskaya
2. APPROVED AND INTRODUCED Decree of the USSR State Committee for Standards dated April 14, 1982 No. 1529
INSTEAD OF GOST 8639-68
4 REFERENCED REGULATORY DOCUMENTS
5. The limitation of the period of validity was removed by the Decree of the State Standard of 07.09.92 No. 1125
6. REPUBLICATION with changes No. 1, 2, 3, approved in June 1987, November 1989, September 1992 (IUS 10-87, 2-90, 12-92)
INTERSTATE STANDARD
|
STEEL PIPES SQUARE Square steel tubes. Range |
GOST |
|
Introduction date 01.01.83 |
|
1. This standard applies to seamless hot-formed and cold-formed steel pipes, electric-welded pipes, cold-formed electric-welded pipes, hot-calibrated electric-welded pipes, as well as pipes made by furnace welding.
2. The shape and dimensions of square pipes must correspond to those indicated on and in.
|
Outer size BUT, mm |
Wall thickness s, mm |
Sectional area, cm 2 |
Weight |
Moment of inertia, cm 4» |
Moment of resistance, cm 3» |
|
|
I x = I y |
W x = W y |
|||||
|
0,283 |
0,222 |
0,039 |
0,079 |
|||
|
0,314 |
0,246 |
0,042 |
0,085 |
|||
|
0,343 |
0,269 |
0,0452 |
0,0904 |
|||
|
0,398 |
0,312 |
0,050 |
0,100 |
|||
|
0,448 |
0,352 |
0,053 |
0,107 |
|||
|
0,443 |
0,348 |
0,147 |
0,196 |
|||
|
0,494 |
0,388 |
0,161 |
0,215 |
|||
|
0,543 |
0,426 |
0,176 |
0,233 |
|||
|
0,638 |
0,501 |
0,199 |
0,265 |
|||
|
0,728 |
0,571 |
0,220 |
0,293 |
|||
|
0,771 |
0,605 |
0,229 |
0,305 |
|||
|
0,603 |
0,474 |
0,368 |
0,368 |
|||
|
0,674 |
0,529 |
0,406 |
0,406 |
|||
|
0,743 |
0,583 |
0,442 |
0,442 |
|||
|
0,878 |
0,689 |
0,510 |
0,510 |
|||
|
1,01 |
0,791 |
0,572 |
0,572 |
|||
|
1,071 |
0,841 |
0,600 |
0,600 |
|||
|
1,37 |
1,075 |
0,723 |
0,723 |
|||
|
0,763 |
0,599 |
0,740 |
0,592 |
|||
|
0,854 |
0,670 |
0,820 |
0,656 |
|||
|
0,943 |
0,740 |
0,897 |
0,718 |
|||
|
1,12 |
0,878 |
1,04 |
0,835 |
|||
|
1,29 |
1,01 |
1,18 |
0,945 |
|||
|
1,37 |
1,07 |
1,24 |
0,996 |
|||
|
1,77 |
1,39 |
1,53 |
1,22 |
|||
|
2,14 |
1,68 |
1,77 |
1,41 |
|||
|
2,48 |
1,95 |
1,95 |
1,56 |
|||
|
0,923 |
0,725 |
1,30 |
0,870 |
|||
|
1,03 |
0,811 |
1,45 |
0,966 |
|||
|
1,14 |
0,897 |
1,59 |
1,06 |
|||
|
1,36 |
1,07 |
1,86 |
1,24 |
|||
|
1,46 |
1,15 |
1,99 |
1,33 |
|||
|
1,57 |
1,23 |
2,12 |
1,41 |
|||
|
1,67 |
1,31 |
2,24 |
1,49 |
|||
|
2,17 |
1,70 |
2,79 |
1,86 |
|||
|
2,64 |
2,07 |
3,27 |
2,18 |
|||
|
3,08 |
2,42 |
3,66 |
2,44 |
|||
|
3,50 |
2,75 |
3,98 |
2,65 |
|||
|
3,88 |
3,04 |
4,23 |
2,82 |
|||
|
1,083 |
0,850 |
2,10 |
1,20 |
|||
|
1,21 |
0,953 |
2,34 |
1,34 |
|||
|
1,85 |
1,45 |
3,45 |
1,97 |
|||
|
1,97 |
1,55 |
3,65 |
2,09 |
|||
|
2,57 |
2,02 |
4,61 |
2,63 |
|||
|
3,14 |
2,46 |
5,44 |
3,11 |
|||
|
3,68 |
2,89 |
6,17 |
3,52 |
|||
|
4,20 |
3,30 |
6,78 |
3,88 |
|||
|
4,68 |
3,67 |
7,30 |
4,17 |
|||
|
5,57 |
4,37 |
8,05 |
4,60 |
|||
|
2,13 |
1,67 |
5,24 |
2,62 |
|||
|
2,27 |
1,78 |
5,57 |
2,78 |
|||
|
2,97 |
2,33 |
7,07 |
3,53 |
|||
|
3,64 |
2,85 |
8,42 |
4,21 |
|||
|
4,28 |
3,36 |
9,61 |
4,81 |
|||
|
4,90 |
3,85 |
10,66 |
5,33 |
|||
|
5,48 |
4,30 |
11,57 |
5,79 |
|||
|
6,57 |
5,16 |
13,01 |
6,50 |
|||
|
7,54 |
5,92 |
13,96 |
6,98 |
|||
|
4,52 |
3,55 |
11,30 |
5,38 |
|||
|
5,18 |
4,07 |
12,56 |
5,98 |
|||
|
5,80 |
4,56 |
13,67 |
6,51 |
|||
|
6,97 |
5,47 |
15,45 |
7,36 |
|||
|
8,02 |
6,30 |
16,69 |
7,95 |
|||
|
3,37 |
2,65 |
10,29 |
4,57 |
|||
|
4,88 |
3,83 |
14,15 |
6,29 |
|||
|
5,60 |
4,40 |
15,79 |
7,02 |
|||
|
6,28 |
4,93 |
17,25 |
7,67 |
|||
|
7,57 |
5,94 |
19,66 |
8,38 |
|||
|
8,74 |
6,86 |
21,42 |
9,52 |
|||
|
9,80 |
7,69 |
22,60 |
10,04 |
|||
|
10,74 |
8,43 |
23,23 |
10,33 |
|||
|
3,77 |
2,96 |
14,36 |
5,74 |
|||
|
4,64 |
3,64 |
17,27 |
6,91 |
|||
|
5,48 |
4,31 |
19,93 |
7,97 |
|||
|
6,30 |
4,94 |
22,35 |
8,94 |
|||
|
7,08 |
5,56 |
24,54 |
9,82 |
|||
|
7,84 |
6,16 |
26,51 |
10,60 |
|||
|
8,57 |
6,73 |
28,26 |
11,30 |
|||
|
9,94 |
7,80 |
31,15 |
12,46 |
|||
|
11,20 |
8,79 |
33,28 |
13,31 |
|||
|
12,34 |
9,69 |
34,70 |
13,88 |
|||
|
4,57 |
3,59 |
25,45 |
8,48 |
|||
|
5,64 |
4,43 |
30,81 |
10,27 |
|||
|
6,69 |
5,25 |
35,81 |
11,94 |
|||
|
7,70 |
6,04 |
40,44 |
13,48 |
|||
|
8,68 |
6,82 |
44,73 |
14,91 |
|||
|
10,57 |
8,30 |
52,30 |
17,43 |
|||
|
12,34 |
9,69 |
58,60 |
19,53 |
|||
|
14,00 |
11,00 |
63,71 |
21,24 |
|||
|
15,54 |
12,20 |
67,71 |
22,57 |
|||
|
7,88 |
6,19 |
58,45 |
16,70 |
|||
|
9,10 |
7,14 |
66,34 |
18,95 |
|||
|
10,28 |
8,07 |
73,74 |
21,07 |
|||
|
12,57 |
9,87 |
87,12 |
24,89 |
|||
|
14,74 |
11,57 |
98,69 |
28,20 |
|||
|
16,80 |
13,19 |
108,56 |
31,02 |
|||
|
18,74 |
14,71 |
116,81 |
33,37 |
|||
|
9,09 |
7,13 |
89,05 |
22,26 |
|||
|
10,50 |
8,24 |
101,44 |
25,36 |
|||
|
11,88 |
9,33 |
113,17 |
28,29 |
|||
|
14,57 |
11,44 |
134,73 |
33,68 |
|||
|
17,14 |
13,46 |
153,84 |
38,46 |
|||
|
19,60 |
15,38 |
170,63 |
42,66 |
|||
|
21,94 |
17,22 |
185,20 |
46,30 |
|||
|
24,17 |
18,97 |
197,66 |
49,41 |
|||
|
10,0 |
26,28 |
20,63 |
208,10 |
52,03 |
||
|
11,0 |
28,28 |
22,20 |
216,64 |
54,16 |
||
|
10,28 |
8,07 |
128,82 |
28,63 |
|||
|
13,48 |
10,59 |
164,63 |
36,58 |
|||
|
16,57 |
13,00 |
197,12 |
43,80 |
|||
|
19,54 |
15,34 |
226,44 |
50,32 |
|||
|
22,40 |
17,58 |
252,71 |
56,16 |
|||
|
25,14 |
19,73 |
276,08 |
61,35 |
|||
|
11,48 |
9,02 |
178,95 |
35,79 |
|||
|
15,08 |
11,84 |
229,71 |
45,94 |
|||
|
18,57 |
14,58 |
276,30 |
55,26 |
|||
|
21,94 |
17,22 |
318,89 |
63,78 |
|||
|
25,20 |
19,78 |
357,62 |
71,52 |
|||
|
28,34 |
22,25 |
392,65 |
78,53 |
|||
|
31,37 |
24,62 |
424,11 |
84,82 |
|||
|
24,34 |
19,11 |
433,59 |
78,83 |
|||
|
28,00 |
21,98 |
488,14 |
88,75 |
|||
|
31,54 |
24,76 |
538,11 |
97,84 |
|||
|
34,97 |
27,45 |
583,63 |
106,11 |
|||
|
26,74 |
20,99 |
572,94 |
95,49 |
|||
|
30,80 |
24,18 |
647,09 |
107,85 |
|||
|
34,74 |
27,27 |
715,66 |
119,28 |
|||
|
38,57 |
30,28 |
778,82 |
129,80 |
|||
|
31,54 |
24,76 |
935,19 |
133,60 |
|||
|
36,40 |
28,57 |
1061,44 |
151,63 |
|||
|
41,14 |
32,29 |
1179,83 |
168,55 |
|||
|
45,77 |
35,93 |
1290,58 |
184,37 |
|||
|
39,20 |
30,77 |
1322,44 |
176,32 |
|||
|
44,34 |
34,81 |
1472,85 |
196,38 |
|||
|
49,37 |
38,75 |
1614,37 |
215,25 |
|||
|
10,0 |
54,28 |
42,61 |
1747,21 |
232,96 |
||
|
53,94 |
42,34 |
2634,06 |
292,67 |
|||
|
60,17 |
47,23 |
2900,49 |
322,28 |
|||
|
10,0 |
66,28 |
52,03 |
3153,95 |
350,44 |
||
|
12,0 |
78,17 |
61,36 |
3623,01 |
402,56 |
||
|
14,0 |
89,59 |
70,33 |
4043,41 |
449,27 |
||
|
Special pipes sizes |
||||||
|
4,20 |
3,30 |
5,33 |
3,33 |
|||
|
4,84 |
3,80 |
8,05 |
4,47 |
|||
|
2,97 |
2,33 |
7,07 |
3,54 |
|||
|
6,09 |
4,78 |
27,10 |
9,85 |
|||
|
13,54 |
10,63 |
76,91 |
23,66 |
|||
Notes:
1. Mass calculated at a steel density of 7.85 g/cm 3 .
2. The static characteristics of the pipes are calculated forR= 1.5s.
3. By agreement between the manufacturer and the consumer, it is allowed to manufacture pipes of other sizes.
Legend Examples
Pipes with an outer dimension of 40 mm, a wall thickness of 3 mm, a length that is a multiple of 1250 mm, made of steel grade 10, group B GOST 13663-86:
The same, measured length 6000 mm:
The same, random length:
3. Pipes are made:
External dimensions from 60 to 180 mm with wall thickness from 4.0 to 14.0 mm seamless hot-formed,
External dimensions from 10 to 120 mm with wall thickness from 1.0 to 8.0 mm seamless cold-formed,
External dimensions from 10 to 100 mm with wall thickness from 0.8 to 5.0 mm
External dimensions from 100 to 180 mm with wall thickness from 4.0 to 14.0 mm
External dimensions from 40 to 70 mm with a wall thickness of 3.0 to 5.0 mm by furnace welding.
4. Cornering radius R should be no more than 2 s.
By agreement between the manufacturer and the consumer, the radius of curvature should be no more than 1.5 s; for electric-welded pipes with external dimensions of 20´ 20 mm and 25´ 25 mm with a wall thickness of 1.5 to 2.0 mm and pipes made by furnace welding - no more than 2.5 s, for electric-welded pipes 60´ 60´ 4 mm in size - no more than 3 s.
5. Pipes are made:
random length
seamless cold-formed - from 1.5 to 11 m,
electrowelded, electrowelded cold-formed - from 1.5 to 11 m,
electrowelded hot-calibrated - from 1.5 to 14 m,
furnace welding pipes - from 4 to 8 m;
measured length
seamless hot-formed - from 4 to 12.5 m,
seamless cold-formed - from 4.5 to 11 m,
electrowelded, electrowelded cold-formed,
electrowelded hot-calibrated - from 5 to 9 m,
furnace welding pipes - from 4 to 8 m.
Maximum deviation for the total length +100 mm;
length multiple dimensional
seamless hot-formed - from 4 to 12.5 m with an allowance for each cut of 5 mm,
seamless cold-formed - from 1.5 to 11 m with an allowance for each cut of 5 mm,
welded - any multiplicity not exceeding the lower limit established for measured pipes.
The total length of the multiple pipes must not exceed the upper limit of the measured pipes. The allowance for each multiplicity is set at 5 mm (unless another allowance is specified in the order) and is included in each ordered multiplicity.
±1.25%
for seamless cold-formed, as well as electric-welded, cold-formed, electric-welded, hot-calibrated pipes up to 30 mm in size
±0.3 mm
±0.25 mm
for seamless cold-formed, as well as electric-welded, electric-welded cold-formed, electric-welded hot-calibrated pipes with sizes over 30 to 50 mm
±0.4 mm
±0.3 mm
for seamless cold-formed pipes, as well as electric-welded pipes, cold-formed electric-welded pipes, hot-calibrated electric-welded pipes larger than 50 mmfor wall thickness > 3.5 mm
±12.5%
±10.0%
for electric-welded and electric-welded hot-calibrated pipes
±10.0%
±10.0%
Concave or convex sides:
for seamless hot-formed pipes with sides of size:
up to 50 mm
0.75 mm
0.5 mm
St. 50" 70mm
1.0 mm
0.8mm
» 70 » 100 mm
1.5mm
1.2mm
» 100 mm
2.0 mm
1.5mm
for seamless cold-formed and welded pipes with side dimensions:
up to 50 mm
0.5 mm
0.5 mm
St. 50 » 70 mm
0.75 mm
0.5 mm
» 70 mm
1.0 mm
0.8mm
Twisting square and rectangular pipes:
for welded and seamless hot-formed pipes, not more than
2° per 1 m
By agreement between the manufacturer and the consumer
for cold-formed pipes
Note.By agreement between the manufacturer and the consumer, the pipes are manufactured with a shifted tolerance for outer dimensions and wall thickness. The value of the shifted tolerance field should not exceed the sum of the maximum deviations given in.
(Revised edition, Rev. No. 1,).
7. The difference in wall thickness should not lead the wall beyond the limit deviations in wall thickness.
8. In the cross section of the pipe, the deviation from the right angle should not exceed ± 1.5 °.
9. The curvature of the pipes should not exceed 2 mm per 1 m of length. At the request of the consumer, pipes are manufactured without straightening, while the norms for curvature are not regulated.
10.(Excluded, Change No. 1).
11. Technical requirements must comply with GOST 13663.
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of Ferrous Metallurgy of the USSR
DEVELOPERS
V. P. Sokurenko, cand. tech. sciences (topic leader); BUT. B. Petrushevskaya
2. APPROVED AND INTRODUCED Decree of the USSR State Committee for Standards dated April 14, 1982 No. 1529
INSTEAD OF GOST 8639-68
4 REFERENCED REGULATORY DOCUMENTS
5. The limitation of the period of validity was removed by the Decree of the State Standard of 07.09.92 No. 1125
6. EDITION (December 2005) with amendments No. 1, 2, 3, approved in June 1987, November 1989, September 1992 (IUS 10-87, 2-90, 12-92)