Wrong side is the most common problem in the pre-welding of straight seam welded pipe, and the wrong side is out of tolerance, which directly leads to the degradation or scrapping of the steel pipe.

Thermal expansion seamless is a processing method of steel pipes, which is to process small-diameter seamless pipes into large-diameter seamless pipes.

There are three main deformation processes in the production of seamless steel pipes today: perforation, pipe rolling and diameter reduction.

As long as the welding conditions such as welding material, welding surface, welding current, welding speed, and welding method are appropriate, galvanized steel pipes can also be welded.

Thick-walled seamless steel pipe has been widely used in pipelines in recent years, can be processed into seamless pipes of different sizes as required.

The pipe pile foundation is the most used form of foundation in deep foundation, its role is to transfer the load of the upper building to the soil layer with strong bearing capacity in depth, or to squeeze the weak soil layer to improve the bearing capacity and compactness of the foundation soil.