Flow Coupling 1 : A heavy walled nipple, designed to resist erosion that can result from turbulence created by a restriction in the flow strong. (RP 14B RP 57, Spec 14)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}