The production process of seamless pipes has always been an example for other steel pipes. Because the first widely used in the steel pipe industry is seamless pipe. Its appearance has broken our steel pipe industry's production process which has always adopted foreign production processes. The seamless pipe factory invested its own costs to send scientific and technical personnel to study in the United States. After research, it finally achieved remarkable results in the steel pipe round steel perforation. Until now, this technology has been included in the state's intangible cultural heritage for protection.
The normal process of seamless pipe is as follows: round steel is perforated to form a tube blank, and then pickled, and the black skin on the outer surface is washed away, and then repaired. After passing the inspection, the mill is rolled or cold drawn. The wall needs to be annealed, and empty drawing is not required. After forming, it is annealed and straightened, and pickled for storage.
Seamless pipe is a steel pipe with no seams on the surface of the whole steel pipe produced by drawing, extrusion, perforation and other methods. It is a round, square and rectangular steel with a hollow cross section and no seams on the periphery. It is made of steel ingots or solid tube blanks by perforation, and then cold drawn. Seamless pipe is a precision cold-drawn seamless pipe for mechanical structures, hydraulic equipment with high dimensional accuracy and good surface finish. The use of precision seamless pipes to manufacture mechanical structures or hydraulic equipment can greatly save machining man-hours, improve material utilization, and help improve product quality.