Product description
We are concentric reducer supplier, manufactures, and exporters, a type of pipe reducer that fastens pipe sections on the same axis and is conical in shape. The usual forming process is reduction pressing, expansion pressing or reduction and expansion pressing. Stamping forming can also be used for some specifications of different diameter tubes. These pipe fittings have varying ends and can join unequal diameter pipes on different pipe sections falling on the same axis.
http://www.sstubecn.com/butt-weld-fittings/concentric-reducer.html