Welding is a fabrication or fusion process that joins metal products by using a high temperature to melt parts combined with the use of a filler metal to make the joint. Welding is distinct from lower temperature metal-joining techniques such as brazing and soldering, which do not melt the base metal. Welded joints are permanent and non-demountable unless flange connections are employed.
Welding steel fittings are used typically for larger bore steel pipe, which are welded to the fitting. This process is known as butt welding. Welding fittings, such as elbows, reducers and tees etc., have chamfered (bevelled) ends, and pipes with compatible (matching) bevelled ends must be employed. Welding fittings also include various types of flanges, which, once fitted to the tube ends, can be jointed together using bolts and gaskets materials to ensure a demountable, high pressure joint.
Welding fittings are typically produced from carbon steel or stainless steel.
