SPECIFICATIONS FOR MILD STEEL TUBES AND TUBULARS CONFIRMING TO IS – 1239 (PART 1) : 1990
Nominal Bore
(NB)		 Class Outside Diameter
MAX                MIN		 Thickness SWG M.S. Black Pipes P/E Galvanized Pipes
S & S
mm inches mm mm mm Kg/m Mtrs/Ton Kg/m Mtrs/Ton
15 (1/2”) L 21.40 21.00 2.00 14 0.947 1056 1.008 992
M 21.80 21.00 2.60 12 1.21 826 1.274 785
H 21.80 21.00 3.20 10 1.44 694 1.504 665
20 (3/4”) L 26.90 26.40 2.30 13 1.38 725 1.451 689
M 27.30 26.50 2.60 12 1.56 641 1.632 613
H 27.30 26.50 3.20 10 1.87 535 1.933 517
25 (1”) L 33.80 33.20 2.60 12 1.98 505 2.082 480
M 34.20 33.30 3.20 10 2.41 415 2.515 398
H 34.20 33.30 4.00 8 2.93 341 3.048 328
32 (1 ¼”) L 42.50 41.90 2.60 12 2.54 394 2.671 374
M 42.90 42.00 3.20 10 3.10 323 3.237 309
H 42.90 42.00 4.00 8 3.79 264 3.917 255
40 (1 ½)” L 48.40 47.80 2.90 11 3.23 310 3.398 294
M 48.80 47.90 3.20 10 3.56 281 3.721 269
H 48.80 47.90 4.00 8 4.37 229 4.525 221
50 (2”) L 60.20 59.60 2.90 11 4.08 245 4.295 233
M 60.80 79.70 3.60 9 5.03 199 5.236 191
H 60.80 59.70 4.50 7 6.19 162 6.419 156
65 (2 ½)” L 76.00 75.20 3.20 10 5.71 175 6.018 166
M 76.60 75.30 3.60 9 6.42 156 6.741 148
H 76.60 75.30 4.50 7 7.93 126 8.215 122
80 (3”) L 88.70 87.90 3.20 10 6.72 149 7.122 140
M 89.50 88.00 4.00 8 8.36 120 8.756 114
H 89.50 88.00 4.80 6 9.90 101 10.609 97
100 (4”) L 113.90 113.00 3.60 9 9.75 103 10.586 94
M 115.00 113.10 4.50 7 12.20 82 13.258 75
H 115.00 113.10 5.40 5 14.50 69 15.552 64
125 (5”) M 140.80 138.50 4.80 6 15.90 63 17.149 58
H 140.80 138.50 5.40 5 17.90 56 19.199 52
150 (6”) M 166.50 163.90 4.80 6 18.90 53 20.300 49
H 166.50 163.90 5.40 5 21.30 47 22.922 44
Tolerance: Thickness: Light + Unlimited, Medium / Heavy: + Unlimited
– 8%                                       – 10 %
Weight: Light: ± 5%, Medium / Heavy: ± 7.5%
(For Quantities per load of 10 Tonnes minimum) (L) –8% HO% M/H ± 10/–

SIZE RANGE WITH APPROXIMATE METERAGE PER M.T. OF BLACK PLAIN–END PIPES
Inches NB mm OD mm 14 Swg
2.00mm		 13 Swg
2.35mm		 12 Swg
2.65mm		 11 Swg
2.90mm		 10 Swg
3.25mm		 9 Swg
3.65mm		 8 Swg
4.05mm		 7 Swg
4.50mm		 6 Swg
4.85mm		 5 Swg
5.40mm
1/2 15 21.30 1050 911 820 760 690 – – – – –
3/4 20 26.90 814 709 633 583 526 – – – – –
1 25 33.70 639 550 498 454 410 370 337 – – –
1 1/4 32 42.40 502 431 388 354 318 287 260 – – –
1 1/2 40 48.30 438 376 335 308 277 249 226 – – –
2 50 60.30 348 298 265 243 219 196 178 162 – –
2 1/2 65 76.10 274 234 208 191 172 154 139 127 – –
3 80 88.90 233 196 177 163 147 130 118 107 99 –
3 1/2 90 101.60 203 174 154 141 127 113 103 93 86 –
4 100 114.30 181 154 137 126 112 101 91 83 76 69
4 1/2 110 127.00 162 138 123 113 101 90 81 74 68 62
5 125 139.70 147 125 111 102 91 82 74 67 62 56
5 1/2 135 152.40 135 115 102 94 84 75 67 61 57 51
6 150 165.10 124 106 94 86 77 69 62 56 52 47
Also available pipes in size 8” to 36” in thickness ranging from 3.25 mm to 12 mm.

CLOSED STRUCTURALS (RHS/SHS) IS 4923. Gr. Yst 240
Section Thickness Sec.Area Weight Moment of Inertia Radius of Gyration Elastic Modulus
D x B
(mm)(mm)		 T
(mm)		 A
(sq.cm.)		 W
(kg./m)		 Lxx
(cm)4		 lyy
(cm)4		 xrxx
(cm)		 yyy
(cm)		 Zxx
(cm)3		 Zyy
(cm)3
25 x 25 3.20 2.53 1.98 1.89 1.89 0.86 0.86 1.51 1.51
38 x 38 3.20 4.19 3.29 8.18 8.18 1.40 1.40 4.30 4.30
4.00 5.03 3.95 9.26 9.26 1.36 1.36 4.48 4.87
49.5x49.5 2.90 5.19 4.07 18.37 18.37 1.88 1.88 7.42 7.42
3.60 6.28 4.93 21.42 21.42 1.85 1.85 8.65 8.65
4.50 7.58 5.95 24.64 24.64 1.80 1.80 9.96 9.96
72 x 72 3.20 8.54 6.70 66.32 66.32 2.79 2.79 18.42 18.42
4.00 10.47 8.22 79.03 79.03 2.75 2.75 21.95 21.95
4.80 12.31 9.66 90.31 90.31 2.71 2.71 25.09 25.09
91.5x91.5 3.60 12.32 9.67 156.49 156.49 3.56 3.56 34.21 34.21
4.50 15.14 11.88 187.57 187.57 3.52 3.52 41.00 41.00
5.40 17.85 14.01 215.68 215.68 3.48 3.48 47.14 47.14
113.5x113.5 4.80 20.28 15.92 393.30 393.30 4.40 4.40 69.30 69.30
5.40 22.60 17.74 432.58 432.58 4.38 4.38 76.23 76.23
132 x 132 4.80 23.83 18.71 634.39 634.39 5.16 5.16 96.12 96.12
5.40 26.59 20.88 700.11 700.11 5.13 5.13 106.08 106.08
50 x 25 3.20 4.13 3.24 11.63 3.80 1.68 0.96 4.65 3.04
66 x 33 2.90 5.19 4.07 27.33 9.12 2.29 1.33 8.28 5.53
3.60 6.28 4.93 31.87 10.52 2.25 1.29 9.66 6.37
4.50 7.58 5.95 36.64 11.93 2.20 1.25 11.10 7.23
96 x 48 3.20 8.54 6.70 98.61 33.28 3.40 1.97 20.54 13.87
4.00 10.47 8.22 117.55 39.32 3.34 1.94 24.49 16.38
4.80 12.31 9.66 134.35 44.55 3.30 1.90 27.99 18.56
122 x 61 3.60 12.32 9.67 232.61 78.83 4.34 2.53 38.13 25.84
4.50 15.14 11.88 278.94 93.78 4.29 2.49 45.73 30.75
5.40 17.85 14.01 320.83 107.03 4.24 2.45 52.60 35.09
145 x 82 4.80 20.28 15.92 555.16 228.50 5.23 3.36 76.57 55.73
5.40 22.60 17.74 610.85 250.59 5.20 3.33 84.26 61.12
172 x 92 4.80 23.83 18.71 917.13 346.91 6.20 3.82 106.64 75.41
5.40 26.59 20.88 1012.47 381.74 6.17 3.79 117.73 82.99
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