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1. Heat treatment  PSL1: J55 and K55 are the same (rollable delivery); PSL2: J55, K55 products should be the whole normalizing or normalizing and tempering, if thickened, should be thickened after nor...

1, Difference between lsaw steel pipe and ssaw steel pipe in production process  LSAW steel pipe is a longitudinally parallel steel pipe. Usually pided into metric welded steel pipe, welded thin-walle...

Production process of ssaw steel pipe: based on strip coil as raw material, often warm extrusion molding, automatic double-wire double-sided submerged arc welding process welding spiral seam steel pip...

LSAW steel pipe is a longitudinally parallel steel pipe. Usually pided into metric welded steel pipe, welded thin-walled pipe, transformer cooling oil pipe and so on. The straight seam welded pipe has...

Advantages of lsaw steel pipe It can destroy the ingot casting structure, refine the grain of the steel, and eliminate the defects of the microstructure, so that the steel structure is dense and the m...

Features of lsaw steel pipe structure in design are as follows: (1) The geometrical characteristics of the pipe section are good, the pipe wall is generally thin, the cross-section material is distrib...