ISO 5167-2 is a part of the ISO 5167 series of international standards that provides guidelines and specifications for the measurement of fluid flow using orifice plates, nozzles, and venturi tubes. Specifically, ISO 5167-2 focuses on the use of orifice plates for flow measurement in closed conduits with a circular cross-section.
ISO 5167-2 Download PDF
Key points about ISO 5167-2:
- Orifice plates: ISO 5167-2 primarily deals with the use of orifice plates as primary devices for flow measurement. Orifice plates are widely used in various industries for their simplicity and cost-effectiveness.
- Measurement accuracy: The standard defines the requirements for the design, installation, and use of orifice plates to ensure accurate and reliable flow measurements.
- Pipe sizes: ISO 5167-2 is applicable to different pipe sizes, allowing for consistent flow measurement across a wide range of pipe dimensions.
- Flow conditions: The standard addresses various flow conditions, including single-phase flow, non-circular conduits, and compressible fluids, providing equations and guidelines for accurate flow calculations.
- Installation requirements: ISO 5167-2 specifies the installation requirements for orifice plates, including the recommended upstream and downstream straight pipe lengths to ensure measurement accuracy.
- Complementary standards: ISO 5167-2 is part of a series of standards that work together to provide comprehensive guidelines for fluid flow measurement using different primary devices, such as ISO 5167-1, which covers nozzles and venturi tubes.
Overall, ISO 5167-2 is a valuable resource for engineers, technicians, and professionals involved in flow measurement applications, ensuring standardized and reliable practices for the use of orifice plates in various industrial processes.
iso_5167_2_2003_orifice-platesOrifice plates
Measurement of fluid flow by means of pressure differential devices like orifice plates inserted in circular-cross section conduits running full.
ISO 5167-2 specifies how to use orifice plates in a conduit running full to measure fluid flowrate. It provides background information for flowrate calculations and is used with ISO 5167-1 requirements. This standard applies to orifice plates used with flange, corner, or D and D/2 pressure tappings, but not other tappings like “vena contracta” or pipe tappings. It is suitable for subsonic flow and single-phase fluids, excluding pulsating flow. Orifice plates outside pipe sizes of 50 mm to 1,000 mm and pipe Reynolds numbers below 5,000 are not covered.
Read Also:
- ISO 5167-1 Download PDF – Measurement of fluid flow by means of pressure differential devices Part 1
- ISO 5167-3 PDF Download – Nozzles and Venturi nozzles
- ISO 5167-4 PDF Download – Venturi tubes
- ISO 5167-5 PDF Download – Cone meters
- ISO 5167-6 PDF Download – Wedge meters
FAQs:
ISO 5167-2 specifies the geometry and installation conditions for orifice plates in a conduit to determine fluid flowrate. It provides background information for flowrate calculations and should be used in conjunction with ISO 5167-1.
ISO 5167-2 is applicable to orifice plates used with flange pressure tappings, corner pressure tappings, or D and D/2 pressure tappings. However, it does not cover other pressure tappings like “vena contracta” or pipe tappings.
This standard applies only to subsonic flow throughout the measuring section and when the fluid is in a single-phase state. It is not suitable for measuring pulsating flow.
ISO 5167-2 is not applicable to orifice plates used in pipe sizes less than 50 mm or greater than 1,000 mm, and it is not suitable for pipe Reynolds numbers below 5,000.
ISO 5167-2 provides guidelines for the proper geometry and installation of orifice plates, which helps ensure accurate flowrate calculations when used in a conduit running full. By following these specifications, measurement uncertainties can be minimized.