Galvanized steel pipe is a welded steel pipe with a hot-dip or electroplated zinc layer on the surface. Galvanizing can increase the corrosion resistance of steel pipes and extend their service life. Galvanized pipes are widely used. In addition to being used as pipeline pipes for general low-pressure fluids such as water, gas, and oil, they are also used as oil well pipes and oil pipelines in the petroleum industry, especially offshore oil fields, oil heaters, condenser coolers, coal distillation and washing oil exchangers for chemical coking equipment, as well as pier piles and support frames for mine tunnels.
The wall thickness requirements of galvanized pipes are determined according to national standards and industry standards, and mainly depend on factors such as the pipe's use environment, material and size. Generally speaking, the wall thickness requirements of galvanized pipes are as follows:
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Galvanized Steel Pipe Wall Thickness Table |
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|
Nominal diameter |
Outer diameter |
Wall thickness |
|
|
MM |
MM |
MM |
Thickened steel pipe |
|
6 |
10 |
2 |
1.059 |
|
8 |
13.5 |
2.75 |
1.046 |
|
10 |
17 |
3.5 |
1.046 |
|
15 |
21.3 |
3.15 |
1.039 |
|
20 |
26.8 |
3.4 |
1.039 |
|
25 |
33.5 |
4.25 |
1.032 |
|
32 |
42.3 |
5.15 |
1.032 |
|
40 |
48 |
4 |
1.03 |
|
50 |
60 |
5 |
1.028 |
|
65 |
75.5 |
5.25 |
1.028 |
|
80 |
88.5 |
4.25 |
1.027 |
|
100 |
114 |
7 |
1.026 |
|
125 |
140 |
7.5 |
1.023 |
|
150 |
165 |
7.5 |
1.023 |
|
explanation：W=C*[0.02466*(D-S)*S] |
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1. Pipeline usage environment: Galvanized steel pipes are subject to different pressures and wear in different use environments. Therefore, when designing and manufacturing pipes, it is necessary to determine the wall thickness specification requirements based on actual conditions. Generally speaking, when it is necessary to withstand high pressure or high temperature, the wall thickness will increase accordingly.
2. Material: The material of the galvanized pipe will also affect its wall thickness specification requirements. Common galvanized pipe materials include low carbon steel, alloy steel, etc. The thickness requirements for pipes of different materials are also different.
3. Size: The size of the pipe is one of the important factors in determining the wall thickness specification requirements. Generally speaking, pipes with larger diameters require thicker walls to ensure that they can withstand the pressure and external environment.
According to the requirements of national standards and industry standards, the wall thickness of galvanized pipes is generally between 0.8-2.5mm, and the specific specification requirements can be adjusted according to actual conditions. When designing and manufacturing pipelines, it is necessary to comprehensively consider factors such as the use environment, material and size to ensure the quality and safety of the pipelines. At the same time, for different types of galvanized pipes (such as hot-dip galvanized pipes, cold-dip galvanized pipes, etc.), the wall thickness specifications will also be different and need to be adjusted according to specific circumstances.
Through reasonable design and manufacturing, it can be ensured that the galvanized pipe has good corrosion resistance and pressure bearing capacity during use, thereby improving the service life and safety of the pipeline.
