carbon steel pipe

ERW (Electric Resistance Welded) pipe is a straight seam electric resistance welded pipe, a steel pipe whose weld is parallel to the longitudinal direction of the steel pipe, which is commonly used for oil, gas, water transmission, machinery manufacturing, etc. It has sturdy frame which is strong enough to make sure of the stable operation. And it is resistant to water, oxygen and corrosion, which is endurable with long life span.

A seamless steel pipe is a circular pipe having a hollow section and no seams around it.  The seamless steel pipe is made of carbon steel, alloy steel, stainless steel ingot or solid tube blank, and then is made by hot rolling, cold rolling or cold drawing.  Seamless pipes are considered superior to welded pipes as they are built using monolithic steel billets, with intrinsic mechanical strength, without seam welds.