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Preheating refers to heating the workpiece to be welded to above room temperature before or during welding. According to the application standard of the material, the current specification usually req...

The hydrostatic pressure test of oil casing pipe is an indispensable part of the steel pipe manufacturing process. Its function is to detect the leakage resistance of the steel pipe under the standard...

Oil casing drilling is also called percussion drilling. The wire rope is used to send the drill bit to the bottom of the well. The beam mechanism is driven by the driving force to move one end of the ...

After removing the root of the weld, double-sided weldments should be inspected. When using the oxyacetylene flame to cut the welding fixture on the alloy pipe that has a tendency to harden, defects i...

Characteristics of straight seam steel pipe: Straight seam steel pipe generally refers to the use of a special process to carry out anti-corrosion treatment on ordinary steel pipes, so that the anti-...

Advantages of LSAW steel pipe in steel structure design are as follows:  (1) The cross section of the straight seam steel pipe has good geometric characteristics. The wall of the pipe is generall...

Straight seam steel pipe refers to a steel pipe whose weld seam is parallel to the length of the steel pipe. Its production process is relatively simple. The strength of spiral steel pipe is generally...

Main equipment of high frequency straight seam welded pipe (ERW welded pipe) production line: 1. Uncoiler The hot-rolled steel strip is disassembled and sent to the strip leveling machine. There are...

Anti-corrosion technology of seamless anti-corrosion steel pipe: The production process of seamless anticorrosive steel pipes is relatively mature, and all kinds of anticorrosion can be produced. Am...

Porosity, bubbles, shrinkage cavity residues, non-metallic inclusions, segregation, white spots, cracks and various abnormal fracture defects in cold drawn seamless steel pipes can be found through ma...