In the construction of pile foundations, concrete square piles and pipe piles are involved, and these two types of piles are different from each other in terms of appearance and characteristics.

The quality of cs seamless pipe billet requirements with the perforation process is closely linked. The selection of a reasonable perforation, change the unfavorable stress state, can prevent defects, but also to reduce the requirements of seamless steel pipe billet.

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.