Carbon steel EFW pipe, also known as carbon steel Electric Fusion Welding pipe, refers to the carbon steel pipe products manufactured by electric fusion welding (EFW) process.Electric fusion welding refers to a kind of electron beam welding, which uses the directional impact kinetic energy of the high-speed electron beam to convert into heating of the workpiece, so that the workpiece leaves the melt and forms a weld. It is mainly used for welding dissimilar steel plates or me...