Electric Resistance Welded Pipe & Tube, abbreviated as ERW pipe, is a type of steel pipe formed by rolling a steel strip or plate into a tube blank using high-frequency electric current heating (resistance heating effect) and then welding the edges of the tube using extrusion rollers under pressure. This process is a form of pressure welding and is widely used in oil and gas transportation, building structures, and automotive manufacturing.The core feature of ERW pipeis a str...