Hot-rolled seamless steel pipe is a widely utilized material across various industries, including petroleum, chemical processing, manufacturing, power generation, and construction. Known for its excellent mechanical strength and corrosion resistance, it effectively meets the demands of a wide range of applications. The specifications of hot-rolled seamless pipes primarily refer to parameters such as outer diameter, wall thickness, and length, which vary based on project requirements.
Diameter Specifications
The outer diameter of hot-rolled seamless steel pipes is typically measured in millimeters (mm), with common sizes including 6mm, 8mm, 10mm, 12mm, 16mm, and 20mm.
Larger diameters enhance the pipe's pressure-bearing capacity, making them particularly suitable for high-pressure environments such as hydraulic systems and boiler applications.
In practical engineering scenarios, the appropriate diameter should be selected based on specific operational requirements, such as pressure levels, flow rates, and structural constraints.
|
Specification |
Outer diameter(mm) |
Wall thickness(mm) |
|
Small diameter seamless steel pipe |
10-76 |
1.5-10 |
|
Medium diameter seamless steel pipe |
89-159 |
2.0-20 |
|
Large diameter seamless steel pipe |
168-351 |
3.0-30 |
Wall Thickness Specifications
The wall thickness of hot-rolled seamless steel pipes is also measured in millimeters (mm), with commonly used sizes including 1.5mm, 2mm, 3mm, 4mm, and 5mm.
A greater wall thickness enhances the pipe's overall strength and pressure-bearing capacity, making it ideal for high-load applications such as heat exchanger tubes.
When determining the appropriate wall thickness, it is important to consider the operating environment, pressure conditions, and mechanical load requirements of the specific project to ensure safe and reliable performance.
|
Outer Diameter (mm) |
Wall Thickness(mm) |
|||||||||||
|
2.5 |
3.0 |
3.5 |
4.0 |
4.5 |
5.0 |
5.5 |
6.0 |
6.5 |
7.0 |
7.5 |
8.0 |
|
|
32 |
1.82 |
2.15 |
2.46 |
2.76 |
3.05 |
3.33 |
3.59 |
3.85 |
4.09 |
4.32 |
4.53 |
4.74 |
|
38 |
2.19 |
2.59 |
2.98 |
3.35 |
3.72 |
4.07 |
4.41 |
4.74 |
5.05 |
5.35 |
5.64 |
5.92 |
|
42 |
2.44 |
2.89 |
3.35 |
3.75 |
4.16 |
4.56 |
4.95 |
5.33 |
5.69 |
6.04 |
6.38 |
6.71 |
|
45 |
2.62 |
3.11 |
3.58 |
4.04 |
4.49 |
4.93 |
5.36 |
5.77 |
6.17 |
6.56 |
6.94 |
7.30 |
|
50 |
2.93 |
3.48 |
4.01 |
4.54 |
5.06 |
5.55 |
6.04 |
6.51 |
6.97 |
7.42 |
7.86 |
8.28 |
|
54 |
3.18 |
3.77 |
4.36 |
4.93 |
5.49 |
6.04 |
6.58 |
7.10 |
7.61 |
8.11 |
8.60 |
9.08 |
|
57 |
4.00 |
4.62 |
5.23 |
5.83 |
6.41 |
6.99 |
7.55 |
8.10 |
8.63 |
9.16 |
9.67 |
10.18 |
|
60 |
4.22 |
4.88 |
5.52 |
6.16 |
6.78 |
7.39 |
7.99 |
8.58 |
9.15 |
9.71 |
10.26 |
10.80 |
|
63.5 |
4.48 |
5.18 |
5.87 |
6.55 |
7.21 |
7.87 |
8.51 |
9.14 |
9.75 |
10.36 |
10.95 |
11.54 |
|
68 |
4.81 |
5.57 |
6.31 |
7.05 |
7.77 |
8.48 |
9.17 |
9.86 |
10.53 |
11.19 |
11.84 |
12.48 |
|
70 |
4.96 |
5.74 |
6.51 |
7.27 |
8.01 |
8.75 |
9.47 |
10.18 |
10.88 |
11.56 |
12.23 |
12.89 |
|
73 |
5.18 |
6.00 |
6.81 |
7.63 |
8.44 |
9.24 |
10.02 |
10.80 |
11.56 |
12.31 |
13.04 |
13.77 |
|
76 |
5.40 |
6.26 |
7.10 |
7.93 |
8.75 |
9.56 |
10.36 |
11.14 |
11.91 |
12.67 |
13.42 |
14.16 |
|
83 |
6.36 |
7.36 |
8.42 |
9.48 |
10.51 |
11.53 |
12.53 |
13.52 |
14.49 |
15.45 |
16.39 |
17.32 |
|
89 |
6.88 |
7.98 |
9.12 |
10.25 |
11.36 |
12.46 |
13.54 |
14.61 |
15.67 |
16.71 |
17.74 |
18.76 |
|
95 |
7.90 |
9.08 |
10.36 |
11.62 |
12.86 |
14.10 |
15.32 |
16.53 |
17.72 |
18.90 |
20.07 |
21.22 |
|
102 |
8.50 |
9.67 |
10.82 |
11.96 |
13.09 |
14.21 |
15.31 |
16.39 |
17.48 |
18.55 |
19.61 |
20.66 |
|
108 |
9.18 |
10.45 |
11.68 |
12.91 |
14.13 |
15.33 |
16.52 |
17.69 |
18.85 |
20.00 |
21.14 |
22.27 |
|
114 |
10.26 |
11.66 |
13.01 |
14.34 |
15.65 |
16.96 |
18.24 |
19.52 |
20.78 |
22.03 |
23.27 |
24.49 |
|
121 |
11.54 |
13.14 |
14.90 |
16.64 |
18.36 |
20.08 |
21.77 |
23.46 |
25.13 |
26.78 |
28.43 |
|
|
127 |
12.73 |
14.75 |
16.78 |
18.79 |
20.78 |
22.76 |
24.72 |
26.67 |
28.61 |
30.53 |
|
|
|
133 |
13.64 |
15.82 |
18.00 |
20.16 |
22.30 |
24.43 |
26.54 |
28.63 |
30.71 |
32.78 |
|
|
|
140 |
15.04 |
17.45 |
19.84 |
22.20 |
24.55 |
26.88 |
29.19 |
31.49 |
33.78 |
|
|
|
|
146 |
16.37 |
18.13 |
20.72 |
23.26 |
25.77 |
28.27 |
30.76 |
33.23 |
35.68 |
|
|
|
|
152 |
17.60 |
19.87 |
22.60 |
25.03 |
27.43 |
29.82 |
32.20 |
34.56 |
36.91 |
|
|
|
Length Specifications
The length of hot-rolled seamless steel pipes is typically measured in meters (m), with standard lengths including 6m, 9m, and 12m.
The appropriate pipe length should be selected based on specific project needs. In general, longer pipes are ideal for large-scale installations to minimize connection points, while shorter lengths are preferred for smaller projects or situations requiring custom cutting, such as in the processing of pup joints.
|
Length(m) |
Outer diameter (mm) |
|
6 |
12.5 - 508 |
|
9 |
12.5 - 508 |
|
12 |
12.5 - 508 |
Common Models and Specifications
1. 20# hot-rolled seamless steel pipe
Outer diameter: 48-1219mm
Wall thickness: 4.0-80.0mm
2. 45# hot-rolled seamless steel pipe
Outer diameter: 48-1219mm
Wall thickness: 4.0-80.0mm
3. Q345B hot-rolled seamless steel pipe
Outer diameter: 48-1219mm
Wall thickness: 4.0-80.0mm
4. 42CrMo hot-rolled seamless steel pipe
Outer diameter: 48-1219mm
Wall thickness: 4.0-80.0mm
5. 27SiMn hot-rolled seamless steel pipe
Outer diameter: 48-1219mm
Wall thickness: 4.0-80.0mm
Summary
In summary, the specifications of hot-rolled seamless steel pipes encompass key parameters such as outer diameter, wall thickness, and length. Selecting the appropriate pipe requires a comprehensive assessment of the actual application, operating conditions, and environmental factors to ensure the chosen model meets both performance requirements and project demands.
United Steel Industry As the most important steel pipe manufacturer and exporter in China, in the past 20 years, we have completed more than 100 projects, with partners in more than 100 countries, and established relationships with oil and gas and EPC companies in many countries business relationship.
For more information about the product price, catalog and rolling mill inspection certificate,
please consult:Email:Sales@usisteels.com
