Welded steel pipe -L290

L290 Welded steel pipe Features

With the rapid development of high quality strip rolling production and the progress of welding and inspection technology, the quality of weld is constantly improving, the variety and specification of welded steel tube is increasing day by day, and it has replaced seamless steel tube in more and more fields.
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Specification of L290 Welded steel pipe

specifications Outer diameter Wall thickness
4分 15 1/2寸 21.25 2.75
6分 20 3/4寸 26.75 2.75
1寸 25 1寸 33.3 3.25
1.2寸 32 11/4寸 42.25 3.25
1.5寸 40 11/2寸 48 3.5
2寸 50 2寸 60 3.5
2.5寸 70 21/2寸 75.5 3.75
3寸 80 3寸 88.5 4
4寸 100 4寸 114 4
5寸 125 5寸 140 4.5
6寸 150 6寸 165 4.5
8寸 200 8寸 219 6
specifications Wall thickness National standard water pressure value specifications Wall thickness National standard water pressure value
219 6 9.7 720 6 3
  7 11.3   7 3.5
  8 12.9   8 4
273 6 7.7   9 4.5
  7 9   10 5
  8 10.3   12 6
325 6 6.5 820 7 3.1
  7 7.6   8 3.5
  8 8.7   9 4
377 6 5.7   10 4.4
  7 6.7   11 4.8
  8 7.6   12 5.3
  9 8.6 920 8 3.1
  10 -   9 3.5
426 6 5.1   10 3.9
  7 5.9   11 4.3
  8 6.8   12 4.7
  9 7.6 1020 8 2.8
  10 8.5   9 3.2
478 6 4.5   10 3.5
  7 5.3   11 3.9
  8 6   12 4.2
  9 6.8 1220 8 -
  10 7.5   10 3
529 6 4.1   11 3.2
  7 4.8   12 3.5
  8 5.4   13 3.8
  9 6.1 1420 10 2.8
  10 6.8   14 3.2
630 6 3.4 1620 12 2.9
  7 4   14 3.2
  8 4.6 1820 14 3.3
  9 5.1 2020 14 -
  10 5.7 2220 14 -
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Ingredient list Of L290 Welded steel pipe

Grade C Mn Si P S Cr Mo Ni N
Q235B Min. / / / / /   /   /
Max. 0.06 0.25 0.12 0.014 0.015      
304L Min. / / / / / 18 / 9 /
Max. 0.03 2 1 0.045 0.03 20 11
304H Min. 0.04 / / 0.045 / 18 / 8 /
Max. 0.1 2 0.75 / 0.03 20 10.5

Processing Technology Of L290 Welded steel pipe

The blank used for welding steel pipe is steel plate or strip steel, which is divided into furnace welding pipe, electric welding (resistance welding) pipe and automatic arc welding pipe because of the different welding process. Because of its different welding form is divided into straight seam welding pipe and spiral welding pipe two kinds. Because of its end shape is divided into circular welded pipe and shaped (square, flat, etc.) welded pipe. The welded pipe is divided into several varieties as follows because of its different materials and uses:

Price Range Of L290 Welded steel pipe

$600-$3000

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