Also known as reducing elbows. A type of chemical pipeline fitting used for connecting pipes of two different diameters. It is further divided into concentric reducing elbows and eccentric reducing elbows. See pipeline fittings.

eccentric reducer (odd-sized pipe)

Eccentric Reducer (Reduced Diameter Fitting)

Pipe sizes include stainless steel reducers, alloy steel, carbon steel reducers with different diameters, and reducers in 20# steel grades like Q234Q345.