1 Judging from the surface, that is, in visual inspection. Visual inspection of welded joints is a s...
1. Fake and inferior thick-walled steel pipes are prone to folding. Folds are various fold lines...
Anti-corrosion steel pipe is a common steel pipe. In order to slow down and prevent the steel pi...
There are 3 categories of trenchless repair technologies for steel pipelines (including more tha...
The application of large-diameter longitudinally ERW welded pipes has become very common in peop...
Spiral steel pipe is usually used in urban drainage pipelines. The use of spiral steel pipes i...
Cleaning method of large diameter steel pipe : 1. Shot blasting and rust removal: The high-powe...
Corrosion of steel pipes is mainly divided into two categories: internal corrosion and external ...
The welding seam of the spiral steel pipe is longer than that of the straight seam steel pipe ....
Welding method: When welding thick-walled steel pipes , first clean the oil, paint, water, rust, ...
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