ISO 5167: Fluid Flow Measurement Standard for Differential Pressure Devices

ISO 5167 is a standard developed by the International Organization for Standardization (ISO) that provides guidelines for the measurement of fluid flow in closed conduits using differential pressure devices, such as orifice plates, venturi tubes, and flow nozzles. The standard specifies the requirements for the design, installation, operation, and maintenance of these devices, as well as the calculation of flow rate based on the measured differential pressure. It is widely used in industries such as oil and gas, chemical processing, and water treatment to ensure accurate and reliable measurement of fluid flow.