Welded steel pipe & tube
Welded steel pipe (steel pipe manufactured with a weld) is a tubular product made out of flat plates, known as skelp, that are formed, bent and prepared for welding.The deviation ERW steel pipe & SAW steel pipe
As ERW steel pipe and SAW steel pipe in the pipe during forming, welding and process is different, so that two kinds of steel pipe in the performance there are some differences.
ERW steel
Resistance welded steel pipe (ERW steel pipe)is a collectively,
straight seam high frequency resistance welding pipe (Electric Resistance
Welding, referred to asOf ERW) ERW are the corresponding first letter of the English word.
Resistance welded steel pipe welded steel pipe, AC and DC welding two steel Forms.
AC welding according to the different frequencies are divided into low-frequency welding,
frequency welding, ultra-high frequency welding and soldering. High frequency welding is
mainly used for thin-walled steel pipe.
Pipe wall thickness or normal production of high-frequency welding is divided into contact
welding and induction welding.DC welding is generally used for small diameter pipe.
SAW steel
SAW steel pipe full name of Submerged Arc Welding Steel Pipe SAW steel pipe it is a manufacturing process using submerged arc welding of steel, the process generates very high current density, flux layer to prevent the rapid dissipation of heat, and concentrated inwelding area.Submerged arc weld of high quality, high efficiency, very little dust-free arc and the characteristics of submerged arc welded pipe used in pressure vessels, pipe manufacture, beams, low-pressure fluid, steel works.
SAW (LSAW steel pipe) primarily Longitudinally Submerged Arc Welding Steel Pipe Longitudinal doubleSide submerged arc welding steel pipes, it is the use of SAW technology to produce straight seam steel pipe.
