ERW Pipe Meaning:
ERW is the abbreviation of Electric Resistance Welding. The ERW pipe often referred to in the steel pipe industry refers to electric resistance welded pipe. The ERW welded pipe production line can produce high-frequency resistance longitudinal welded pipes, square pipes, rectangular pipes, steel sheet piles and other products.
Electric resistance welded steel pipes are divided into two types: AC welded steel pipe and DC welded steel pipe. AC welding is divided into low frequency welding, intermediate frequency welding, super intermediate frequency welding and high frequency welding according to the different frequency. 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. Generally speaking, the high frequency welded pipe is included in the ERW welded pipe, which is a kind of ERW welded pipe produced by the high frequency welding process. ERW longitudinal welded pipe is a steel pipe with advanced performance, leading quality and relatively economical product in the field of oil and gas storage and transportation.
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 aviation, aerospace, energy, electronics, automobiles, light industry and other industrial sectors as one of the important welding processes. It is commonly used to transport oil, natural gas and other vapor and liquid objects, and can meet various requirements of high and low pressure. It currently plays a pivotal role in the field of transportation pipes in the world.
Tips: ASTM A53 Grade B is the grade in ERW high frequency welded pipe ( a53b erw), divided into A and B grades. ASTM is only a set of specifications. ASTM steel pipe A53 A corresponds to the Chinese standard GB8163 raw material is 10# steel, and A53 B corresponds to the Chinese standard GB8163 raw material 20#.
For example: ASTM (standard) A53 (grade) gr (abbreviation of grade) b (grade B)