Abstract: A tool for supporting and centering a flat circular orifice plate flow meter between two pipe flanges that have circumferentially spaced apart circular flange bolt holes that lie on a bolt circle and receive circular flange bolts for interconnecting the flanges, comprising a flat plate having a first edge which includes at least two points that lie on a line of curvature having a radius equal to the radius of the circular orifice plate, and at least one set of at least two tool holes sized to receive two of the bolts that interconnect the flanges.

Abstract: A process flow device that includes a self-averaging orifice plate type of primary flow element for measuring, by a differential pressure process, the volumetric rate of fluid flow at a point in a fluid carrying conduit where the velocity profile of the fluid is asymmetric with respect to the longitudinal axis of the conduit. The improved flow element comprises a planar flow-impeding plate disposed transversely across the interior of the conduit and perpendicular to the longitudinal axis thereof. The plate includes at least three circular apertures eccentrically disposed with respect to the longitudinal axis of the conduit to create static pressure averaging on the downstream side of the plate. Upstream and downstream static pressure sensing ports are respectively provided on opposite sides of the flow impeding plate.

Abstract: A tool for supporting and centering a flat circular orifice plate flow meter between two pipe flanges that have circumferentially spaced apart circular flange bolt holes that lie on a bolt circle and receive circular flange bolts for interconnecting the flanges, comprising a flat plate having a first edge which includes at least two points that lie on a line of curvature having a radius equal to the radius of the circular orifice plate, and at least one set of at least two tool holes sized to receive two of the bolts that interconnect the flanges.

Abstract: A pressure sensor of a process device, is characterized by applying a plurality of pressures to the process sensor. Outputs of the plurality of pressures are received. A compensation relationship is determined based upon the pressure sensor output. The characterization data is collected in a distribution which is non-uniform across the pressure range.

Abstract: A process flow device that includes a self-averaging orifice plate type of primary flow element for measuring, by a differential pressure process, the volumetric rate of fluid flow at a point in a fluid carrying conduit where the velocity profile of the fluid is asymmetric with respect to the longitudinal axis of the conduit. The improved flow element comprises a planar flow-impeding plate disposed transversely across the interior of the conduit and perpendicular to the longitudinal axis thereof. The plate includes at least three circular apertures eccentrically disposed with respect to the longitudinal axis of the conduit to create static pressure averaging on the downstream side of the plate. Upstream and downstream static pressure sensing ports are respectively provided on opposite sides of the flow impeding plate.