Hot-dip galvanized pipe, in order to improve the corrosion resistance of steel pipes, general steel pipes are galvanized. Galvanized steel pipes are divided into two types: hot-dip galvanizing and electro-galvanizing. Hot-dip galvanizing has a thick zinc layer, while electro-galvanizing has low cost and the surface is not very smooth.
Nominal wall thickness: mm2.0, 2.5, 2.8, 3.2, 3.5, 3.8, 4.0, 4.5;
Coefficients: c1.064, 1.051, 1.045, 1.040, 1.036, 1.034, 1.032, 1.028.
Note: The mechanical properties of steel are important indicators to ensure the final performance (mechanical properties) of steel. It depends on the chemical composition and heat treatment system of the steel. In steel pipe standards, tensile properties (tensile strength, yield strength or yield point, elongation), hardness and toughness indicators are specified according to different usage requirements, as well as high and low temperature properties required by users. Grades of galvanized pipe steel: Q215A; Q215B; Q235A; Q235B
Test pressure value/Mpa: D10.2-168.3mm is 3Mpa; D177.8-323.9mm is 5Mpa.
| Common specifications of galvanized steel pipes | ||||
| Nominal diameter | outer diameter | wall thickness | Increased weight coefficient of galvanized wall black iron pipe | |
|
MM |
MM |
MM |
Ordinary steel pipe | Thickened steel pipe |
|
6 |
10.0 |
2 |
1.064 |
1.059 |
|
8 |
13.5 |
2.75 |
1.056 |
1.046 |
|
10 |
17.0 |
3.50 |
1.056 |
1.046 |
|
15 |
21.3 |
3.15 |
1.047 |
1.039 |
|
20 |
26.8 |
3.40 |
1.046 |
1.039 |
|
25 |
33.5 |
4.25 |
1.039 |
1.032 |
|
32 |
42.3 |
5.15 |
1.039 |
1.032 |
|
40 |
48.0 |
4.00 |
1.036 |
1.030 |
|
50 |
60.0 |
5.00 |
1.036 |
1.028 |
|
65 |
75.5 |
5.25 |
1.034 |
1.028 |
|
80 |
88.5 |
4.25 |
1.032 |
1.027 |
|
100 |
114.0 |
7.00 |
1.032 |
1.026 |
|
125 |
140.0 |
7.50 |
1.028 |
1.023 |
|
150 |
165.0 |
7.50 |
1.028 |
1.023 |
|
Explanation: W=C*[0.02466*(D-S)*S] W--Weight per meter of galvanized pipe: kg/m C--The increased weight coefficient of galvanized pipes compared with black iron pipes D--outer diameter of black iron pipe S--Wall thickness of black iron pipe |
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