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while steel pipes are developing rapidly, the market There will also be some fake and inferior products appearing one after another, so how to judge t

which factors influence the size, shape and performance of LSAW welds？

What are the commonly used standards for carbon steel pipes?

Welding residual stress is an important problem in the field of welding engineering research. In the engineering application involving welding, we sho

Explain submerged arc welding process and its applications

Pipeline scar is a common defect of welded pipe, and its specific manifestations include crush, indentation and scratch. Crush: refers to the damage o

Extrusion amount refers to the extrusion amount of the weld metal when the edge of the tube billet passes through the extrusion roller after high freq

Submerged arc welding is mainly suitable for flat position welding. If certain tooling aids are used, corner welding and horizontal welding can be rea

1. Cracks Hot crack, in the process of weld cooling, because the sulfur and phosphorus impurities in the steel or welding material form a variety of b

Reinforcement is not only the need of welding process, but also has an impact on the safe operation of the vessel, especially the fatigue life. The we

Generally, the welding part needs to go through the process of heating melting metallurgical reaction solidification crystallization solid phase trans

Sometimes, the defects in the actual production of high frequency welded pipe are not caused by one reason, but usually the result of a variety of fac