The quality inspection method of spiral steel pipe is as follows: 1 Judging from the surfac...
If the spiral steel pipe for water transmission is to transport tap water or drinking water, the...
The difference between the seamless steel pipe and other long strips is that there are no joints...
Straight seam steel pipe is a welding process of steel pipe opposite to spiral steel pipe. The w...
1. Spiral steel pipes with fixed lengths can not be bundled. 2. If the two ends of the spiral...
The ability of metal materials to resist the indentation of the surface of hard objects is called ha...
To prolong the service life of the spiral steel pipe , the first thing you should think about is ...
1) Work before molding The raw materials are strip coil, welding wire, and flux. They must undergo...
Thick-walled steel pipes refer to steel pipes whose outer diameter and wall thickness ratio is l...
1. Preliminary rounding stage: the fan-shaped blocks are opened until all the fan-shaped blocks are ...
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