Flowell Straightening Vanes are designed to be installed in piping upstream of an orifice plate. When used with recommended minimum pipe lengths, they reduce flow disturbances caused by upstream piping configurations or valves. Flowell manufactures both line mounted and flanged models in carbon steel and 304 and 316 stainless steel. Every vane is built to the requirements of API 14.3 and ISO 5167. The flanged model is secured between upstream pipe flanges. Line models are installed inside of piping and secured with set screws which are threaded through the exterior wall of the piping.