There are several differences between ERW steel pipe and seamless steel pipe. ERW pipe is the abbreviation of electric resistance welding, which is used for the transportation of liquids such as fuel, gas, natural gas, and plays a vital role in transportation pipelines around the world regardless of pressure requirements, while seamless pipe is a steel pipe with a circular shape and no seams around it and a hollow cross-section, which is used to transport liquids and can also be used to manufacture structural parts and equipment parts due to its extremely high bending and torsional strength and impossible brightness. In short, the uses of ERW pipe and smooth steel pipe are quite diverse.