Performance Analysis of Pointy Angle Geometry Orifice Plate (Short Square Edged Orifice with Back Bevel Angle)

Abstract

An orifice plate meter is a tool used to measure the volumetric flow rate in a pipeline based on the principle of pressure difference, and it is controlled according to the setpoint to optimize the fluid flow process in the pipeline. Measurement of process variables is very important in industry, especially in the oil and gas industry. Orifice meters are flow-rate measuring devices that use the flow-obstacle method; because their geometry is simple, their cost is low, and they are easy to use. In this study, we discuss the flow of fluid through the orifice plate, which has a difference in geometry due to the back bevel angle. The results of the calculation obtained the value of the discharger coefficient (Cd), pressure difference (dp) in the short square-edged orifice with back bevel angle, with an average Cd value of 0.629, and the difference in pressure on the upstream and downstream sides was obtained at 2284 Pa, 1796 Pa, and 1474 Pa. Meanwhile, the maximum permanent safety loss occurs for the orifice type with a pointed angle plate (short square-edged orifice with a back bevel angle), at 74%. As well as a decrease in pressure until it reaches the minimum at the vena contracta.