svsteelpipe
https://www.svsteelpipe.com/products/butt-weld-pipe-fitting/
Stainless steel butt weld elbow is to connect pipes and fittings ends by butt welding process. Also known by weld tee fittings (buttweld fittings). SS butt weld fittings comprises of long radius elbow, concentric reducer, eccentric reducers and Tees etc. Butt weld stainless steel and carbon steel fittings are an important part of industrial piping system to change direction, branch off or to mechanically join equipment to the system.