ERW stands for Electric Resistance Welding.
The welding method for ERW pipe and submerged arc welded pipe is significantly different. ERW uses a pressure welding method without filler metal, resulting in a weld that is not filled with other components. The high-frequency current skin effect and proximity effect are relied upon to instantly heat the plate edge to the welding temperature. The silver extrusion then forms the forging organization of the weld. To produce high-quality steel pipes, weld on-line or off-line heat treatment is necessary. This process refines the weld zone organization, allowing the high-quality ERW welded pipe weld to reach the same toughness level as the base material. This level of quality cannot be achieved through the buried fox welding process.
EFW stands for Electric Fusion Welding.
Submerged arc welding (SAW) is a type of electric fusion welding (EFW). It involves heating the metal through one or several self-consumption electrodes and workpieces, melting the metal and filler material without the need for pressure. The filler metal is supplied entirely from the electrode.
Gas Melt Welding (GMAW) is an electric fusion welding (EFW) process that uses inert gas for protection, resulting in better effects.
Spiral Welding is a type of submerged arc welding that utilizes a spiral weld seam.
Post time: Dec-04-2023