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With the stainless steel pipe demand unceasing enhancement, so for processing and production technology of stainless steel pipe has been continuously improved, the following for stainless steel pipe more accord with our use, Chinese bearing network to provide the production technology of three major processing common stainless steel pipe.
Drawing composite and mechanical expansion composite technology
This method because of its technological requirements, both inside and outside of the pipe fitting requirements of composite outer pipe surface or inner tube surface is circular, and because the transmission cable and insulating materials can not be compressed, the conductance through the drill pipe body inner will in cable joint part of "micro convex", thus drawing composite and mechanical expansion the insulation failure and properties of bonded composite will be on cable, is not applicable.
Hydrostatic fluid forced composite technology
The inner liner tube to inject high-pressure water, with increasing water pressure in the pipe body liner, liner pipe by elastic deformation state into a state of plastic deformation, and close to the outer tube body, the pressure when the inner liner tube reaches a certain value, the outer tube body of elastic deformation, the inner liner and the outer tube body tightly together, when the inner pipe pressure is removed, the outer tube elastic recovery, inner tube and outer tube body tightly integrated.
The hot metal pretreatment technology
Through the pretreatment of hot metal desulphurization, 120t top and bottom blowing converter dephosphorization, 120t top bottom combined blowing converter (decarburization) - LF - RH - slab continuous casting, cold pack, 1500mm hot strip mill of broadband timber, coiling, trial production of hot-rolled broadband X80 pipeline steel. The test results show that: in the slab casting of X80 Pipeline Steel w (T (O)) is 81 * 10-6, w (N) 58 * 10-6, w (H) <1 * 10-6; the yield strength of the steel (Rel) for 600 ~ 640MPa, the tensile strength (Rm) of 720 ~ 765MPa, elongation (A) ranged from 28.5% to 31.5%, the shear area of DWTT fracture of 60% samples of the ratio (SA) of 40% ~ 60%.