사업품목
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Welded steel pipe (ERW / SAW / JCOE)
Electric Resistance Welded (ERW) / Submerged Arc Welded (SAW) steel pipe
Steel pipes are produced by shaping hot-rolled steel plates into a cylindrical shape and welding them together using either electric resistance welding or arc welding, to create various specifications such as outer diameter, thickness, and material. Generally, they are circular in shape, but square and other polygonal shapes can also be produced according to specific orders.
ERW (Electric Resistance Welding) is a welding method that heats the two surfaces of a welding material together by passing high-frequency current directly or indirectly between them, and then applies pressure to join them.
The advantages of ERW welding include:
1) High efficiency and high-quality welding
2) High-speed welding and mass production
3) Welding of thick-walled pipes is possible
4) Very narrow heat-affected zone of the weld
5) Minimization of oxidation layer and deformation
6) Applicable to various metals
SAW (Submerged Arc Welding) is an automatic welding method that uses a solid wire supplied within a pre-laid flux to generate an arc within the flux and welds the material. It is used for various purposes, such as structural and piping applications, and pipelines.