The forming methods for manufacturing large-diameter LSA steel pipes include UOE forming method, roll forming method (CFE), CE forming and so on. For most of the forming methods, the last process is to perform a full-length expansion of the welded tube blank to improve the quality of the welded tube.

Flanged means that the end of the pipe is convex to the inside or outside, and the rounded edge: a pipe fitting that forms a bulge or groove in the circumferential direction of the pipe.

Pipe end thickening is mainly used for petroleum steel pipes and geological steel pipes. Because the pipe wall is thinned after the pipe end is threaded, the threaded connection part becomes the weak link of the strength of the entire pipe body.

In order to increase the use space of the building, the designer of the building will centrally install some pipes. In this case, there will be some pipes passing through the floor, roof and various walls.

Some of the problems that are easy to appear for pipes are definitely inseparable from the problem of wear, and welded pipes are no exception. Welded steel pipes will inevitably have some wear problems during the production process.

What is the process and purpose of borax blowing in the production process of seamless steel pipes? The limited mandrel continuous rolling mill has one more process than the floating and semi-floating mills, which is to spray antioxidant with nitrogen into the capillary before the entrance of the tube mill.