Reducing flange

A reducing flange combines a larger nominal flanged connection with a smaller pipe-side opening in one component. “Reducing” describes the size relationship and does not by itself define the pipe-end construction; reducing flanges may be based on different flange styles. The identity is distinct from a conical butt-weld reducer and from a threaded reducing fitting. Procurement must specify the base flange style, both connection sizes, bore, facing and flow-transition requirements. Reduction direction and concentric geometry are not inferred from the title.