welded steel pipe

The details of products: 1 Definition: welded steel pipe is also called welded pipe which is steel pipe formed by welding the curled steel plates or strip steel, with general fixed length of 6m.

2 Production process: raw material uncoiling – flattening – end cutting and welding – looping – molding – welding – internal/external removal of welding beads – precorrection – inductive heat treatment – sizing and straightening – eddy current testing – cutting – water pressure inspection – acid pickling – final inspection (strict control) – packing – delivery 3 Category: Production methods: a.

Process – electric arc-welded pipes, resistance welded pipe (high frequency, low frequency), gas-welded pipes, furnace butt-welded pipes b.

Welding seam – straight welded pipes, spiral welded pipes 4 Wall Thickness Thin-wall steel pipes, thick-wall steel pipes 5 End Shape Circular welded pipes and specially-shaped (square, flat, etc.) welded pipes 6 Length: 6m -12m(capable of being customized and processed according to customer requirements) 7 Surface:Prime quality (bared, oiled, color paint, 3LPE, or other anti-corrosive treatment) 8 Packing: bundling, nude packing, or packing according to customer requirements 9 Carbon Steel Straight Welded Pipes Weight (kg) per meter Note: d (outer diameter); t (wall thickness) 10 Features: Straight welded pipes feature simple production process, high production efficiency, low cost and high development speed.

The intensity of spiral welded pipes is generally higher than that of straight welded pipes; welded pipes with larger pipe diameters can be produced by relatively narrow blanks; welded pipes with different pipe diameters can be produced blanks with the same width.

However, spiral welded pipes have the length increase of 30~100%, as well as lower production speed compared with straight welded pipes with the same length. 11Application: structure, electric power transmission tower projects, piling, water, oil & gas pipeline engineering, mechanical industry, municipal projects, roads and its auxiliary facilities, etc.

12 The heoretical weight Nominal size GB thickness mm Size OD National thickness Welded pipe theory weight gauge 4inch 15 1/2inch 21.25 2.75 1.26 6inch 20 3/4inch 26.75 2.75 1.63 1inch 25 1inch 33.3 3.25 2.42 1.2inch 32 11/4inch 42.25 3.25 3.13 1.5inch 40 11/2inch 48 3.5 3.84 2inch 50 2inch 60 3.5 4.88 2.5inch 70 21/2inch 75.5 3.75 6.64 3inch 80 3inch 88.5 4.0 8.34 4inch 100 4inch 114 4.0 10.85 5inch 125 5inch 140 4.5 15.04 6inch 150 6inch 165 4.5 17.81 8inch 200 8inch 219 6 31.52

Spiral welded pipe gauge Specification Thickness Kg/m GB pressure value Department of hydraulic pressure Specification Thickness Kg/m GB pressure value Department of hydraulic pressure 219 6 32.02 9.7 7.7 720 6 106.15 3 2.3 7 37.1 11.3 9 7 123.59 3.5 2.7 8 42.13 12.9 10.3 8 140.97 4 3.1 273 6 40.01 7.7 6.2 9 158.31 4.5 3.5 7 46.42 9 7.2 10 175.6 5 3.9 8 52.78 10.3 8.3 12 210.02 6 4.7 325 6 47.7 6.5 5.2 820 7 140.85 3.1 2.4 7 55.4 7.6 6.1 8 160.7 3.5 2.7 8 63.04 8.7 6.9 9 180.5 4 3.1 377 6 55.4 5.7 4.5 10 200.26 4.4 3.4 7 64.37 6.7 5.2 11 219.96 4.8 3.8 8 73.3 7.6 6 12 239.62 5.3 4.1 9 82.18 8.6 6.8 920 8 180.43 3.1 2.5 10 91.01 - 7.5 9 202.7 3.5 2.8 426 6 62.25 5.1 4 10 224.92 3.9 3.1 7 72.83 5.9 4.6 11 247.22 4.3 3.4 8 82.97 6.8 5.3 12 269.21 4.7 3.7 9 93.05 7.6 6 1020 8 200.16 2.8 2.2 10 103.09 8.5 6.7 9 224.89 3.2 2.5 478 6 70.34 4.5 3.5 10 249.58 3.5 2.8 7 81.81 5.3 4.1 11 274.22 3.9 3 8 93.23 6 4.7 12 298.81 4.2 3.3 9 104.6 6.8 5.3 1220 8 239.62 - 1.8 10 115.92 7.5 5.9 10 298.9 3 2.3 529 6 77.89 4.1 3.2 11 328.47 3.2 2.5 7 90.61 4.8 3.7 12 357.99 3.5 2.8 8 103.29 5.4 4.3 13 387.46 3.8 3 9 115.92 6.1 4.8 1420 10 348.23 2.8 2 10 128.49 6.8 5.3 14 417.18 3.2 2.4 630 6 92.83 3.4 2.6 1620 12 476.37 2.9 2.1 7 108.05 4 3.1 14 554.99 3.2 2.4 8 123.22 4.6 3.6 1820 14 627.04 3.3 2.2 9 138.33 5.1 4 2020 14 693.09 - 2 10 153.4 5.7 4.5 2220 14 762.15 - 1.8

Commodity ERW / LSAW spiral welded steel pipe from China manufacturer Outer diameter ERW LSAW SSAW 1/8 - 20 inch (10.3 - 508 mm) 12 - 56 inch (323.8 - 1,420 mm) 8 - 126 inch (219.1 - 3,200 mm) Wall thickness 0.4 - 16 mm 6.0 - 40 mm 6.0 - 26 mm Length 5.8 ~ 12.0 m or upon customers' requirements Standard GB/T 3091, GB/T 13793, ASTM A252, ASTM A53, ASTM A500, EN 10210, EN 10219, API 5L,  DIN 1626/1615, DIN 17120, etc.

Grade SS400, Q235, Q345, Q460, A572 Gr.50, A572 Gr.60, S235, S275, S355, Grade A/B, X42, X52, X60, X70, etc. Surface Prime quality (bared, oiled, color paint, 3LPE, or other anti-corrosive treatment) Delivery Time Generally within 30days after receiving the deposit or L/C at sight Payment Terms 1. T/T: 30% T/T advance, 70% balance copy of  B/L 2.

L/C: at sight

Port Tianjin Application structure, electric power transmission tower projects, piling, water, oil & gas pipeline engineering, mechanical industry, municipal projects, roads and its auxiliary facilities, etc.