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CDW/DOM/ERW Pipes

CDW is made from carbon and alloy, electric resistance welded steel tube with all of the flash removed. Tubing is further processed by cold drawing the semi-finished tube through dies and over mandrels simultaneously to achieve the finished dimensions.

CDW STEEL TUBING MANUFACTURING PROCESS

The manufacturing process for CDW round steel tubing begins with coils of steel, which are slit to the proper width for the desired tube size. The strip is cold formed and passed through an electric resistance welder which joins the edges together, under pressure, to complete the tubular shape. After testing the weld’s integrity, the tubing is cut to length for further processing. The cold-drawing process creates a uniform, precision product with substantially improved tolerances, surface finish and tensile strength, increased hardness, and good machinability. In this process, the tube is cleaned and annealed, and one end of each length is squeezed to a point so it can be gripped by the drawing mechanism.

The tube is then drawn through one or more dies and over mandrels. This reduces the diameter of the tube and thins its walls to the required dimensions in a controlled fashion to provide the qualities desired in the finished product. Metallurgically, drawing improves the tube’s concentricity, tensile strength, hardness, and machinability. Close dimensional accuracy is achieved through tight control of both outside and inside diameters.

These tubes are used for various applications like :

  • Hydraulic Cylinders
  • Engine Assemblies
  • Pumps
  • Hydraulic Components
  • Frames
  • Industrial Lift Components
  • Tool Extensions
  • Chassis
  • Dampeners
  • Gas Springs
  • Headers
  • Head Rests
  • Pillars
  • Seat Frames
  • Shafts (Drive, Half and Prop)
  • Shock Absorbers
  • Steering
  • Struts

SIZE RANGE

  • CDW Tubes from 10.00 MM OD to 60.00 MM OD with thickness from 0.088 MM To 6.00 MM
  • SHS (Square Hollow Section) : 25x25 MM To 180x180 MM
  • RHS (Rectangular Hollow Section) : 30x20 MM To 240x120 MM

Part-I Size Wise Matrix Chart (Erw Tubes)

Sr.No. Tube/Pipe Outer Dia (In MM) Tube/Pipe Thickness (In MM)
0.68 0.78 0.88 0.99 1.19 1.49 1.57 1.87 2.00 2.20 2.50 3.00 3.20 3.50 4.00 4.50 5.00 6.00 6.50
1 12.00 X X X X X - X X - X X X X X X X X X X
2 12.70 X - - - - - - X X X X X X X X X X X X
3 15.87 X - - - - - - - - X X X X X X X X X X
4 19.05 X - - - - - - - - X X X X X X X X X X
5 22.22 X - - - - - - - - - - - - X X X X X X
6 25.40 X - - - - - - - - - - - - - X X X X X
7 28.57 X - - - - - - - - - - - - - - X X X X
8 31.75 X - - - - - - - - - - - - - - - - X X
9 38.10 X X X X X X - - - - - - - - - - - - X
10 42.70 X X X X X X - - - - - - - - - - - - X
11 44.45 X X X X X X - - - - - - - - - - - - -
12 50.80 X X X X X X - - - - - - - - - - - - -
13 54.00 X X X X X X - - - - - - - - - - - - -
14 63.50 X X X X X X - - - - - - - - - - - - -

Part-II HR Precision Tube Size (Round)

Sr.No. OD Thickness (MM)
1 21.30 1.60 1.80 2.00 2.20 2.50 3.00 3.50 - - - - - - - - - - - - - - -
2 26.40 1.60 1.80 2.00 2.20 2.50 3.00 3.50 - - - - - - - - - - - - - - -
3 33.70 1.60 1.80 2.00 2.20 2.50 3.00 3.50 - - - - - - - - - - - - - - -
4 38.10 1.60 1.80 2.00 2.20 2.50 3.00 3.50 - - - - - - - - - - - - - - -
5 42.40 1.60 1.80 2.00 2.20 2.50 3.00 3.50 4.50 - - - - - - - - - - - - - -
6 48.30 1.60 1.80 2.00 2.20 2.50 3.00 3.50 4.50 - - - - - - - - - - - - - -
7 50.80 1.60 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 - - - - - - - - - - - -
8 54.00 1.60 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 - - - - - - - - - - - -
9 60.30 1.60 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 - - - - - - - - - - - -
10 63.50 1.60 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -
11 70.00 1.60 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -
12 73.00 1.60 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -
13 76.20 1.60 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -
14 88.90 - 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -
15 101.60 - 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -
16 114.30 - 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -
17 127.00 - 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -
18 139.70 - 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -
19 152.40 - 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -
20 165.10 - 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -
21 193.70 - 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -
22 219.00 - 1.80 2.00 2.20 2.50 3.00 3.50 4.50 5.00 6.00 6.50 7.00 7.50 8.00 8.50 9.00 9.50 - - - - -

Part-III HR Precision Tube Size (Square)

Sr.No. Section Thickness (MM)
1 25x25 MM 1.60 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 - - - - - - - - - - -
2 30x30 MM 1.60 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 - - - - - - - - - - -
3 31.75x31.75 MM 1.60 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 - - - - - - - - - - -
4 32x32 MM 1.60 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 - - - - - - - - - - -
5 35x35 MM 1.60 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 - - - - - - - - - - -
6 38x38 MM 1.60 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 - - - - - - - - - - -
7 40x40 MM 1.60 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 - - - - - - - - - - -
8 48x48 MM - 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 - - - - - - -
9 50x50 MM - 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
10 60x60 MM - - 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
11 70x70 MM - - 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
12 72x72 MM - - 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
13 75x75 MM - - 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
14 80x80 MM - - 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
15 100x100 MM - - 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
16 113.50x113.50 MM - - 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
17 132x132 MM - - 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
18 150x150 MM - - 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
19 180x180 MM - - - - - - 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -

Part-IV HR Precision Tube Size (Rectangle)

Sr.No. Section Thickness (MM)
1 30x20 MM 1.80 2.00 2.20 2.50 2.80 - - - - - - - - - - - - - - -
2 32x20 MM 1.80 2.00 2.20 2.50 2.80 - - - - - - - - - - - - - - -
3 40x30 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 - - - - - - - - - - - -
4 45x30 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 - - - - - - - - - - - -
5 25x50 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 4.50 5.00 - - - - - - -
6 50x30 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 4.50 5.00 - - - - - - -
7 60x30 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 4.50 5.00 - - - - - - -
8 60x40 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 4.50 5.00 - - - - - - -
9 62x32 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 4.50 5.00 - - - - - - -
10 70x50 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 4.50 5.00 - - - - - - -
11 75x25 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 4.50 5.00 - - - - - - -
12 75x45 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 4.50 5.00 - - - - - - -
13 80x40 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 4.50 5.00 - - - - - - -
14 75x50 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 4.50 5.00 - - - - - - -
15 96x48 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 4.50 5.00 - - - - - - -
16 100x50 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
17 120x60 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
18 122x61 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
19 150x50 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
20 125x75 MM 1.80 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
21 150x75 MM - 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
22 145x82 MM - 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
23 150x100 MM - 2.00 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
24 172x92 MM - - 2.20 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
25 200x100 MM - - - 2.50 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -
26 240x120 MM - - - - 2.80 3.00 3.20 3.50 4.00 4.50 5.00 5.50 6.00 6.50 7.00 7.50 8.00 - - -

Part-V Size Wise Matrix Chart (CDW Tubes)

Sr.No. Tube/Pipe Outer Dia (In MM) Tube/Pipe Thickness (In MM)
0.088 0.990 1.20 1.50 1.60 1.80 1.90 2.00 2.20 2.50 2.60 2.80 2.90 3.00 3.10 3.20 3.30 3.40 3.50 3.60 3.80 3.90 4.00 4.10 4.20 4.40 4.50 4.60 4.80 5.00 6.00
1 10.00 X X X X X X X X X X X X X X X X X X X X X X -
2 11.98 X X X X X X X X X X X X X X X X X X X X X -
3 13.99 X X X X X X X X X X X X X X X X X X -
4 16.00 X X X X X X X X X X X X X X X -
5 18.00 X X X X X X X X X -
6 19.98 X X -
7 21.99 X X X -
8 24.00 X X X -
9 26.00 X X X -
10 27.99 X X X -
11 29.99 X X X -
12 32.00 X X X -
13 34.01 X X X -
14 35.99 X X X -
15 37.99 X X X -
16 40.00 X X X -
17 42.01 X X X -
18 43.99 X X X -
19 45.99 X X X -
20 48.00 X X X X X -
21 50.01 X X X X X X X -
22 60.00 X X -