An Electric Fusion Welded (EFW) Pipe is a welded pipe formed by rolling plate and welding the seam. EFW is a process in which metal is heated by electrodes (filling metal) and the electric arc is used to make the welding. The EFW pipe is the most popular process for large diameter pipe uses a longitudinal seam weld. Melt Gas Shielded Welding (GMAW) is a type of EFW that is similar to submerged arc welding, but its protection comes from inert gases and works better. (Refer to the Electric Resistance Welded (ERW) Pipe)
Related Definitions in the Project: The Piping and Pipeline Engineering
