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 :: Specifications   Download Specifications  
Specifications of M.S. ERW Tubes as per IS:1239 [Part - I] 1990 Equivalent to
BS 1387 / 85
NOMINAL
CLASS
OUTSIDE DIAMETER
WALL THICKNESS
PLAIN ENDS
SCREWED AND SOCKETED
BORE (NBmm inches
abs
MINmm
MAmm
mm
SWG
Kg / Mtr
Mtrs / Tonne
Kg / Mtr
Mtrs / Tonne
15 (1/2")
L
21
21.4
2
14
0.947
1056
0.956
1046
M
21
21.8
2.6
12
1.21
826
1.22
820
H
21
21.8
3.2
10
1.44
694
1.45
690
20 (3/4")
L
26.4
26.9
2.3
13
1.38
725
1.39
719
M
26.5
27.3
2.6
12
1.56
641
1.57
637
H
26.5
27.3
3.2
10
1.87
535
1.88
532
25 (1")
L
33.2
33.8
2.6
12
1.98
505
2
500
M
33.3
34.2
3.2
10
2.41
415
2.43
412
H
33.3
34.2
4
8
2.93
341
2.95
339
32 (11/4")
L
41.9
42.5
2.6
12
2.54
394
2.57
389
M
42
42.9
3.2
10
3.1
325
3.13
319
H
42
42.9
4
8
3.79
264
3.82
262
40 (11/2")
L
47.8
48.4
2.9
11
3.23
310
3.27
306
M
47.9
48.8
3.2
10
3.56
281
3.6
278
H
47.9
48.8
4
8
4.37
229
4.41
227
50 (2")
L
59.6
60.2
2.9
11
4.08
245
4.15
241
M
59.7
60.8
3.6
9
5.03
199
5.1
196
H
59.7
60.8
4.5
7
6.19
162
6.26
160
65 (21/2")
L
75.2
76
3.2
10
5.71
175
5.83
172
M
75.3
76.6
3.6
9
6.42
156
6.54
153
H
75.3
76.6
4.5
7
7.93
126
8.05
124
80 (3")
L
87.9
88.7
3.2
10
6.72
149
6.89
145
M
88
89.5
4
8
8.36
120
8.53
117
H
88
89.5
4.8
6
9.9
101
10.4
96
100 (4")
L
113
113.9
3.6
9
9.75
103
10
100
M
113.1
115
4.5
7
12.2
82
12.5
80
H
113.1
115
5.4
5
14.5
69
14.8
68
100 (4")
L
113
113.9
3.6
9
9.75
103
10
100
M
113.1
115
4.5
7
12.2
82
12.5
80
H
113.1
115
5.4
5
14.5
69
14.8
68
TOLERANCES
Thickness : Light tubes : Not Limited
: - 8%
Medium & Heavy Tubes : + Not Limited
: - 10%
Weight : 1. Single tube (Light Series) : +10% - 8%
2. Single tube (Medium & Heavy Series) : + - 10%
3. For quantities perload of 10 tonnes min (light Series) : + - 5%
4. For quantities perload of 10 tonnes min. (Medium & Heavy Series) : + - 7.5%
Length : Light, Medium & Heavy tubes : Random Length of 4 to 7 meters unless specified otherwise