Seamless Stainless Steel Tubing Stainless steel tube is a hollow round steel tube, mainly used in petroleum, chemical, medical, food, light industry, machinery and instruments and other industrial pipes and mechanical structural components. In addition, bending, torsional strength of the same, lighter, so it is widely used in the manufacture of mechanical parts and engineering structures.Stainless steel seamless pipe production process: a. Round pipe preparation; b. Heating; c. Hot punch; d. Cutting head; e. Pickling; f. Grinding; g. Lubrication; h. Cold rolling process; i. Degreasing; j. Solution heat treatment; k. Straightening; l. Pipe cutting; m. Pickling; n. Product testing.
Seamless Stainless 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 |
- |
High-quality products

The corrosion resistance of stainless steel depends on the alloying elements contained in the steel. Chromium is the basic element to obtain corrosion resistance of stainless steel, when the chromium content in steel reaches 1.2%, chromium and corrosive media in the role of oxygen in the steel surface to form a thin layer of the oxide film (from the passive film) , Can prevent further corrosion of steel matrix. In addition to chromium, the commonly used alloying elements are nickel, molybdenum, titanium, niobium, copper, nitrogen, etc., to meet the various uses of stainless steel on the organization and performance requirements.
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