Different types of LSAW steel pipe production

LSAW steel pipe is a steel pipe made of hot-rolled or cold-rolled steel plate or steel strip coil welded on the welding equipment for straight seam welding to get the pipe are called LSAW pipe. LSAW steel pipe (YB242-63) is a steel pipe with weld seam parallel to the longitudinal direction of the steel pipe. Usually divided into metric electric welded steel pipe, electric welded thin-walled pipe, transformer cooling oil pipe and so on.

LSAW steel pipe on the welding process can be divided into resistance welding straight seam steel pipe and submerged arc welding straight seam steel pipe, resistance welding straight seam steel pipe is divided into high-frequency welding straight seam steel pipe, medium-frequency welding straight seam steel pipe, low-frequency welding straight seam steel pipe, while the submerged arc welding straight seam steel pipe is called double-sided submerged arc welding straight seam steel pipe or LSAW straight seam steel pipe, which LSAW is (Longitudinally Submerged Arc). Welding abbreviation for LSAW).

Resistance Welding straight seam steel pipe is also called ERW straight seam steel pipe where the ERW is (Electric Resistance Weldin), the abbreviation is short for ERW. high frequency welding straight seam steel pipe is also called ERW straight seam steel pipe. ERW is a kind of general term for resistance welding steel pipe, longitudinal high-frequency resistance welded pipe (Electric Resistance Welding, short for ERW). (ERW) ERW is the first letter of the corresponding English words. Resistance welding steel pipe is divided into two forms of AC welding steel pipe and DC welding steel pipe.

AC welding according to the different frequencies are divided into low-frequency welding, medium-frequency welding, super medium-frequency welding and high-frequency welding. High-frequency welding is mainly used for the production of thin-walled steel pipe or ordinary wall thickness steel pipe, high-frequency welding is divided into contact welding and induction welding. DC welding is generally used for small diameter steel pipe.

Therefore, comprehensively speaking, high frequency welded pipe is included in ERW welded pipe, which is a kind of ERW welded pipe produced by high-frequency welding process.ERW LSAW welded pipe is a steel pipe in the field of oil and gas storage and transportation with advanced product performance, leading quality and more economical. The probability of defects is small, and it can be conditioned to transport humid sour natural gas; after expansion, the geometric dimensional accuracy of the steel pipe is high; welding is carried out along a straight line in a horizontal position after the molding is completed, therefore, the wrong edge, open seam, and the circumference of the pipe diameter are better controlled, and the welding quality is excellent.