Schedule 40 Erw Steel Pipe, welding pipe with ordinary welding technology is not the same, the weld is made of the base material of the steel body melting, mechanical strength better than the general pipe. Smooth appearance, high precision, low cost welding seam height, favorable 3PE anti-corrosion coating. High-frequency welded steel pipe and submerged arc welded pipe welding methods are significantly different. As the welding is completed at high speed instantly, to ensure the quality of welding is much more difficult than submerged arc welding.
Erw Steel Pipe wall thickness classification table
|
Inch |
inch sizc |
OD |
Wall Thickness Standard |
||||||||||||||
|
SCH 5s |
SCH 10S |
SCH 10 |
SCH 20 |
SCH 30 |
SCH 40 |
SCH 60 |
SCH 80 |
SCH 100 |
SCH 120 |
SCH 140 |
SCH 160 |
STD |
XS |
XXS |
|||
|
1/8 |
DN6 |
10.3 |
- |
1.24 |
- |
- |
- |
1.73 |
- |
2.42 |
- |
- |
- |
- |
1.73 |
2.41 |
- |
|
1/4 |
DN8 |
13.7 |
- |
1.65 |
- |
- |
- |
2.24 |
- |
3.02 |
- |
- |
- |
- |
2.24 |
3.02 |
- |
|
3/8 |
DN10 |
17.1 |
- |
1.65 |
- |
- |
- |
2.31 |
- |
3.2 |
- |
- |
- |
- |
2.31 |
3.20 |
- |
|
1/2 |
DN15 |
21.3 |
1.65 |
2.11 |
- |
- |
- |
2.77 |
- |
3.73 |
- |
- |
- |
4.78 |
2.77 |
3.73 |
7.47 |
|
3/4 |
DN20 |
26.7 |
1.65 |
2.11 |
- |
- |
- |
2.87 |
- |
3.91 |
- |
- |
- |
5.56 |
2.87 |
3.91 |
7.82 |
|
1 |
DN25 |
33.4 |
1.65 |
2.77 |
- |
- |
- |
3.38 |
- |
4.55 |
- |
- |
- |
6.35 |
3.38 |
4.55 |
9.09 |
|
1-1/4 |
DN32 |
42.2 |
1.65 |
2.77 |
- |
- |
- |
3.56 |
- |
4.85 |
- |
- |
- |
6.35 |
3.58 |
4.85 |
9.70 |
|
1-1/2 |
DN40 |
48.3 |
1.65 |
2.77 |
- |
- |
- |
3.68 |
- |
5.05 |
- |
- |
- |
7.14 |
3.68 |
5.08 |
10.15 |
|
2 |
DN50 |
60.3 |
1.65 |
2.77 |
- |
- |
- |
3.91 |
- |
5.54 |
- |
- |
- |
8.74 |
3.91 |
5.54 |
11.07 |
|
2-1/2 |
DN65 |
73.0 |
2.11 |
3.05 |
- |
- |
- |
5.16 |
- |
7.01 |
- |
- |
- |
9.53 |
5.16 |
7.01 |
14.02 |
|
3 |
DN80 |
88.9 |
2.11 |
3.05 |
- |
- |
- |
5.49 |
- |
7.62 |
- |
- |
- |
11.13 |
5.49 |
7.52 |
15.24 |
|
3-1/2 |
DN90 |
101.6 |
2.11 |
3.05 |
- |
- |
- |
5.74 |
- |
8.08 |
- |
- |
- |
- |
5.74 |
8.08 |
- |
|
4 |
DN100 |
114.3 |
2.11 |
3.05 |
- |
- |
- |
6.02 |
- |
8.58 |
- |
11.13 |
- |
13.49 |
6.02 |
8.56 |
17.12 |
|
5 |
DN125 |
141.3 |
2.77 |
3.4 |
- |
- |
- |
6.55 |
- |
9.53 |
- |
12.70 |
- |
15.88 |
6.55 |
9.53 |
18.05 |
|
6 |
DN150 |
168.3 |
2.77 |
3.4 |
- |
- |
- |
7.11 |
- |
10.97 |
- |
14.27 |
- |
18.26 |
7.11 |
10.97 |
21.95 |
|
8 |
DN200 |
219.1 |
2.77 |
3.76 |
- |
6.35 |
7.04 |
8.18 |
10.31 |
12.70 |
15.09 |
18.26 |
20.62 |
23.01 |
8.18 |
12.70 |
22.23 |
|
10 |
DN250 |
273.1 |
3.40 |
4.19 |
- |
6.35 |
7.8 |
9.27 |
12.70 |
15.09 |
18.26 |
21.44 |
25.4 |
28.58 |
9.27 |
12.70 |
25.40 |
|
12 |
DN300 |
323.9 |
3.96 |
4.57 |
- |
6.35 |
8.38 |
10.31 |
14.27 |
17.48 |
21.44 |
25.4 |
28.58 |
33.32 |
9.35 |
12.70 |
25.40 |
|
14 |
DN350 |
355.6 |
3.96 |
4.78 |
6.35 |
7.92 |
9.53 |
11.13 |
15.09 |
19.05 |
23.83 |
27.79 |
31.75 |
35.71 |
9.53 |
12.70 |
- |
|
16 |
DN400 |
406.4 |
4.19 |
4.78 |
6.35 |
7.92 |
9.53 |
12.70 |
16.66 |
21.44 |
26.19 |
30.96 |
36.53 |
40.49 |
9.53 |
12.70 |
- |
|
18 |
DN450 |
457 |
4.19 |
4.78 |
6.35 |
7.92 |
11.13 |
14.27 |
19.05 |
23.83 |
29.36 |
34.93 |
39.67 |
45.24 |
9.53 |
12.70 |
- |
|
20 |
DN500 |
508 |
4.78 |
5.54 |
6.35 |
9.53 |
12.70 |
15.09 |
20.62 |
26.19 |
32.54 |
38.1 |
44.45 |
50.01 |
9.53 |
12.70 |
- |
|
22 |
DN550 |
559 |
4.78 |
5.54 |
6.35 |
9.53 |
12.70 |
- |
22.23 |
28.58 |
34.93 |
41.28 |
47.63 |
53.98 |
9.53 |
12.70 |
- |
|
24 |
DN600 |
610 |
5.54 |
6.35 |
6.35 |
9.53 |
14.27 |
17.48 |
24.61 |
30.96 |
38.89 |
46.02 |
52.37 |
59.54 |
9.53 |
12.70 |
- |
|
26 |
DN650 |
660 |
- |
- |
7.92 |
12.7 |
- |
- |
- |
- |
- |
- |
- |
- |
9.53 |
12.70 |
- |
|
28 |
DN700 |
711 |
- |
- |
7.92 |
12.7 |
15.88 |
- |
- |
- |
- |
- |
- |
- |
9.53 |
12.70 |
- |
|
30 |
DN750 |
762 |
6.35 |
7.92 |
7.92 |
12.7 |
15.88 |
- |
- |
- |
- |
- |
- |
- |
9.53 |
12.70 |
- |
|
32 |
DN800 |
813 |
- |
- |
7.92 |
12.7 |
15.88 |
17.48 |
- |
- |
- |
- |
- |
- |
9.53 |
12.70 |
- |
|
34 |
DN850 |
864 |
- |
- |
7.92 |
12.7 |
15.88 |
17.48 |
- |
- |
- |
- |
- |
- |
9.53 |
12.70 |
- |
|
36 |
DN900 |
914 |
- |
- |
7.92 |
12.7 |
15.88 |
19.05 |
- |
- |
- |
- |
- |
- |
9.53 |
12.70 |
- |
|
38 |
DN950 |
965 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
9.53 |
12.70 |
- |
|
40 |
DN1000 |
1015 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
9.53 |
12.70 |
- |
|
42 |
DN1050 |
1067 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
9.53 |
12.70 |
- |
|
44 |
DN1100 |
1118 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
9.53 |
12.70 |
- |
|
46 |
DN1150 |
1188 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
9.53 |
12.70 |
- |
|
48 |
DN1200 |
1219 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
9.53 |
12.70 |
- |
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Erw Steel Pipe Production Process
High-frequency welded pipe is characterized by: welding speed, welding heat affected zone is small, welding on the workpiece can not clean, can be welded thin-walled tube, weldable metal tube.High-frequency welded pipe typical process: slitting - open-book - strip leveling - head and tail shear - strip butt welding - looper storage material - forming - welding - clear burr - sizing - testing - flying cut - Straightening - pipe processing - hydrostatic testing - flaw detection - printing and coating - finished products.
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Production Process

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