The weight factor of the galvanized seamless pipe is to galvanize the general steel pipe to improve the corrosion resistance of the steel pipe. Galvanized steel seamless pipe is divided into two types: hot-dip galvanized and electro-galvanized. The hot-dip galvanized galvanized layer is thick, the cost of electro-galvanized is low, and the surface is not very smooth. Oxygen blowing welded pipe: used as oxygen blowing pipe for steelmaking, generally small-diameter welded steel pipe, with eight specifications ranging from 3/8 to 2 inches. It is made of 08, 10, 15, 20 or 195-Q235 steel strips. In order to prevent corrosion, it is necessary to carry out aluminizing treatment.
Weight factor of galvanized steel pipe
Nominal wall thickness mm: 2.0 2.5 2.8 3.2 3.5 3.8 4.0 4.5
Coefficient c: 1.064 1.051 1.045 1.040 1.036 1.034 1.032 1.028
Note that the mechanical properties of steel are important indicators to ensure the final use performance (mechanical properties) of steel, which depends on the chemical composition of the steel and the heat treatment system. In the steel pipe standard, according to different use requirements, the tensile properties (tensile strength, yield strength or yield point, elongation), hardness and toughness indicators, as well as high and low temperature properties required by users are specified. Steel grades: Q215A; Q215B; Q235A; Q235B.
Test pressure value/Mpa: D10.2-168.3mm is 3Mpa; D177.8-323.9mm is 5Mpa
1. Grade and chemical composition
The grade and chemical composition of the steel for galvanized steel pipe shall conform to the grade and chemical composition of the steel for black pipe specified in GB 3092.
2. Manufacturing method
The manufacturing method of the black pipe (furnace welding or electric welding) is selected by the manufacturer. Galvanizing adopts hot dip galvanizing method.
3. Threads and pipe joints
3.1 For galvanized steel pipes delivered with threads, the threads shall be machined after galvanizing. The thread should meet the requirements of YB 822.
3.2 Steel pipe joints shall comply with the regulations of YB 238; malleable iron pipe joints shall comply with the regulations of YB 230.
4. Mechanical properties The mechanical properties of steel pipes before galvanizing should meet the requirements of GB 3092.
5. The uniformity of the galvanized layer The galvanized steel pipe should be tested for the uniformity of the galvanized layer. The steel pipe sample shall not turn red (copper-plated color) after being continuously dipped in copper sulfate solution for 5 times.
4 points*1.8 1.2 inches*2.2 2.5 inches*2.75 4 inches*3.75
4 points*2.0 1.2"*2.5 2.5"*3.0 5"*2.75
4 points*2.2 1.2"*2.75 2.5"*3.25 5"*3.0
4 points*2.3 1.2"*3.0 2.5"*3.5 5"*3.5
4 points*2.5 1.5"*2.2 3"*2.5 5"*3.75
6 points*1.8 1.5"*2.5 3"*2.75 5"*4.0
6 points*2.0 1.5 inches*2.75 3 inches*3.0 6 inches*2.75
6 points*2.2 1.5"*3.0 3"*3.25 6"*3.0</p