The difference between ERW pipes and LSAW pipes
"ERW Pipe" is a high-frequency straight seam resistance welding pipe, English Electric Resistance Welding, the abbreviation referred to as ERW, used to transport oil, natural gas and other vapor-liquid objects meet the high and low voltage requirements, currently the world conveying pipe It occupies a pivotal position in the field.
1, pipe refers to the normal "submerged arc welding of steel," electrical engineering with "SC" said the gas can be used for water pipe to be as threading pipe, relatively thick.
2, line pipe wire tube that is, relatively thin, with a "T" indicates, can only do threading works.
3, ERW pipe is "high-frequency electric resistance welded steel pipe", and not the same as an ordinary pipe welding process, the weld base metal is melted by a body made of steel, good mechanical strength than the average pipe. "LSAW Pipe" is the LSAW main technology features:
1) steel molding process, steel uniform deformation, small residual stress, surface does not produce scratches. Processed steel in diameter and thickness of the pipe sizes range, greater flexibility, especially in the production of high-grade steel thick-walled pipe, particularly large diameter thick-walled tube having regard other processes incomparable advantages, we can meet users demand more steel specifications;
2) inside and outside welding (fine welding) process after the first pre-welding, welding can be achieved in the best position, less prone to the wrong side, partial and incomplete penetration weld defects, easily controlled welding
3) overall mechanical expanding, can effectively improve the steel dimensional accuracy, and improve the distribution pipe internal stress, thereby preventing damage due to stress caused by corrosion, and help welding construction site;; four pairs of steel pipe 9 quality 100% quality inspection, the steel pipe production of the whole process in the effective detection, under surveillance, effectively ensure the product quality; all the equipment 5 entire production line includes a computer data acquisition system networking capabilities, data real-time transmission the central control room of the production. "ERW" straight seam welded pipe and steel pipe is parallel to the longitudinal weld steel pipe. Usually divided into metric welded steel pipe, welded thin-walled tube, transformer cooling tubing and the like. Longitudinal production process is simple, high production efficiency, low cost, rapid development.
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