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High-frequency welding originated in the 1950s. It is a new type of welding process that uses the skin effect and proximity effect generated by high-frequency current to connect steel plates and other...

Electric resistance welded pipes (ERW steel pipe) are longitudinally welded from metal after moving it afterward. CDW pipes are produced by expelling the metal to the required length; Hence ERW pipes ...

After the tubing, casing pipe and line pipe are produced, the surface is usually sprayed with anti-corrosion paint (Varnish, coating), and the outer surface of the pipe is sprayed with a striking mark...

The details of ERW pipe evaluation process:  1. Non-destructive testing Rotate the detection arm of the inspection station into the straight seam welded pipe production line, observe the position of t...

The production of seamless steel pipes has a history of nearly 100 years. The use of steel pipes was started by a Scottish inventor in 1815 connecting the tubes to convey gas for lights. In 1836, the...

ERW welded pipe is made by using the skin effect and proximity effect of high-frequency current to quickly heat the edge of the pipe blank to the welding temperature and then squeeze and weld it. Comp...

Seamless steel pipe is an important type of steel pipe in production and life. It is an important steel that is relatively strong and durable. Seamless steel pipes will also encounter bending deformat...

The 46th edition of API 5B was released on December 1, 2017. The standard temporarily stated that it was officially implemented on July 1, 2018. Publication 1 will be published soon. There are too man...

What is the difference between a hot-rolled seamless steel pipe and a cold-rolled seamless steel pipe? Is the usual seamless steel pipe a hot-rolled seamless steel pipe? Cold-rolled seamless steel ...

When the spiral steel pipe (SSAW) is heated, the iron, alloy, and elements on the surface of the steel react with oxygen, carbon dioxide, and water vapor in the medium to form an oxide film. The pheno...