ERW steel pipe is a general name for resistance welded steel pipe. High frequency resistance welding (Electric Resistance Welding, ERW for short) is the first letter of the corresponding English word. Resistance welded steel pipes are divided into two types: AC welded steel pipes and DC welded steel pipes. AC welding is divided into low-frequency welding, intermediate-frequency welding, ultra-intermediate-frequency welding and high-frequency welding according to different frequencies. High frequency welding is mainly used for the production of thin-walled steel pipes or ordinary thick-walled steel pipes. High-frequency welding is divided into contact welding and induction welding. DC welding is generally used for small diameter steel pipes. Therefore, in general, the high-frequency welded pipe is included in the ERW welded pipe, which is an ERW welded pipe produced by the high-frequency welding process. ERW straight seam welded pipe is a steel pipe with advanced product performance, leading quality and relatively economical performance in the field of oil and gas storage and transportation, which is used to transport petroleum, natural gas and other vapor liquids objects can meet various requirements of high and low pressure, and currently occupy a pivotal position in the field of transportation pipes in the world.
ERW stands for resistance welding. Resistance welding has the characteristics of high production efficiency, low cost, material saving, and easy automation. Therefore, it is widely used in various industrial sectors such as aviation, aerospace, energy, electronics, automobiles, and light industry.It is one of the important welding processes.
