ERW Steel Tubes

After the coil has been Pickled and Slit, a flat steel strip of the correct width for the end tube size is obtained. This strip is passed through a series of forming machines that shape it into a round tube. Next, this tube is passed through a Weld box wherein the edges of the tube are welded together. After this, the resulting excess residue known as ‘flash’ is removed from the tube surface, drawn out and moved through a Cooling box (filled with water). Finally, the tube moves through a selection of finishing rolls wherein it is shaped and cut off to match the pre-set length requirements. We specialise in the following shapes- Square, rectangle & oval.

 

Our facility includes two Tube Mills for manufacturing ERW Steel Tubes, ranging from 12.70mm dia (1/2” dia) to 125mm Dia (5” Dia).

TUBE MILLS:

We have two Tube Mills for manufacturing of ERW Steel Tubes, ranging from 12.70mm dia (1/2” dia) to 125mm Dia (5” Dia). Over and above, we are also manufacturing ERW square, rectangular and oval tubes. We are enclosing herewith the list of sizes range of tubes manufactured at our end (Annexure-I).

ERW TUBE MILLS (2Nos.) – (Size Range : 15.88mm to 101.6 mm OD)

ERW Tube Division

Machine Name Capacity Production Rate
OD Thickness in MM M.T
Tube Mill – 1 1/2 to 1.1/2 15.88 to 28.58 1500 MT / Month
Tube Mill – 11 1.1/4 to 4″ 31.75 to 101.6 1700 MT / Month
SIZE RANGE WITH APPROXIMATE METERAGE PER M. T. OF PRECISION TUBES.
OUTER DIAMETER ROUND 21S wg 19 Swg 18 Swg 16 Swg 14 Swg 12 Swg 10 Swg
Sr.Nos MM Inches 0.80 MM 1.00 MM 1.25 MM 1.60 MM 2.00 MM 2.65 MM 3.25 MM
1 15.88 5/8 3370 2720 2220 1780 1460 0 0
2 19.05 3/4 2780 2250 1820 1445 1190 0 0
3 22.23 7/8 2369 1904 1543 1225 1002 782 0
4 25.40 1 2061 1661 1347 1063 869 672 564
5 28.58 1.1/8 1824 1470 1187 939 763 590 492
6 31.75 1.1/4 1639 1319 1063 841 681 528 438
7 34.93 1.3/8 0 1195 963 760 616 474 394
8 38.10 1.1/2 0 1092 881 694 561 433 358
9 41.28 1.5/8 0 1006 810 638 516 396 328
10 44.45 1.3/4 0 933 750 591 477 366 303
11 47.63 1.7/8 0 870 699 550 445 339 281
12 50.80 2 0 814 654 515 415 319 263
13 57.15 2.1/4 0 722 580 456 368 281 232
14 63.60 2.1/2 0 648 521 409 329 252 207
15 76.20 3 0 539 432 339 273 208 171
SQUARE
16 19X19 3/4 2061 1661 1347 1063 869 0 0
17 25X25 1 1639 1319 1063 841 681 528 438
18 30X30 1.1/4 0 1092 881 694 561 433 358
19 40X40 1.1/2 0 814 654 515 415 319 263
20 50X50 2 0 648 521 409 329 252 207
RECTANGLE
21 30X20 1639 1319 1063 841 681 528 438
22 40X20 0 1092 881 694 561 433 358
23 40X30 0 933 750 591 477 366 302
24 50X25 0 870 699 550 445 340 281
25 50X30 0 814 654 515 415 319 263
26 60X40 0 0 521 409 329 252 207
27 80X40 0 0 432 339 273 208 171
SIZE RANGE WITH APPROXIMATE METERAGE PER M.T.OF BLACK PLAIN-END PIPES
Inches NB mm OD mm 14 Swg 13 Swg 12 Swg 11 Swg 10 Swg 9 Swg 8 Swg 7 Swg 6 Swg 5 Swg
2.00 mm 2.35 mm 2.65 mm 2.90 mm 3.25 mm 3.65 mm 4.05 mm 4.50 mm 4.85 mm 5.40 mm
1 1/2″ 15 21.30 1050 911 820 760 690
2 3/4″ 20 26.90 814 709 633 583 526
3 1″ 25 33.70 639 550 498 454 410 370 337
4 1.1/4″ 32 42.40 502 431 388 354 318 287 260
5 1.1/2″ 40 48.30 438 376 335 308 277 249 226
6 2″ 50 60.30 348 298 265 243 219 196 178 162
7 2.1/2″ 65 76.10 274 234 208 191 172 154 139 127
8 2″ 80 88.90 233 196 177 163 147 130 118 107 99
9 3.1/2″ 90 101.60 203 174 154 141 127 113 103 93 86
10 4″ 100 114.30 181 154 137 126 112 101 91 83 76 69
11 4.1/2″ 110 127.00 162 138 123 113 101 90 81 74 68 62
12 5″ 125 139.70 147 125 111 102 91 82 74 67 62 56
13 5.1/2″ 135 152.40 135 115 102 94 84 75 67 61 57 51
14 6″ 150 165.10 124 106 94 86 77 69 62 56 52 47
CLOSED STRUCTURALS (RHS/SHS)IS 4923.Gr YST 310
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)’ Lyy (cm)’ xrxx (cm) yyy (cm) Zxx (cm)’ Zyy (cm)’
1 25×25 3.20 2.53 1.98 1.89 1.89 0.86 0.86 1.51 1.51
2 38×38 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 4.87 4.87
3 49.5×49.5 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
4 72×72 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
5 91.5×91.5 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
8 50×25 3.20 4.13 3.24 11.63 3.80 1.68 0.96 4.65 3.04
9 66×33 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
10 96×48 3.20 8.54 6.70 98.61 33.28 3.40 1.97 2054.00 13.87
4.00 10.47 8.22 117.55 39.32 3.35 1.94 24.49 16.38
4.80 12.31 9.66 134.35 44.55 3.30 1.90 27.99 18.56