Welding Overlay. Overlay welding is a welding process in which a material with specific properties is covered on the welding surface of a workpiece. Material and weight savings may be gained when a clad high strength quenched and tempered steel is used in a.
Weld Overlay Clad Pipe. A weld overlay is performed to protect the base material from wear or corrosive environments. This process is mainly used for hard facing corrosion protection intermediate layers and repairing worn surfaces and is often used by the oil and gas industry to ensure the safe long-term operation of pipelines valves flanges and other containment vehicles.
Automated weld overlay can be used for towers separators coker drums reactors tanks digesters boilers nozzles heat exchangers and more.
The actual weld overlay process used depends on many factors including access welding position the alloy applied and economics. The purpose is to restore the hardness of the outer surface of the workpiece or increase the external size of the workpiece. In some alloy combinations dilution of the weld overlay material by the steel requires that more than one weld pass is required. Weld Overlay WOL also known as cladding hardfacing weld cladding or weld overlay cladding is a process where one or more metals are joined together via welding to the surface of a base metal as a layer.