ISO 5167-5 is a part of the ISO 5167 series of standards that pertains to the measurement of flow rate using various types of flowmeters. Specifically, ISO 5167-5 focuses on the calibration of nozzles and orifice plates for flow measurement purposes.
This standard specifies the procedures and requirements for the calibration of nozzles and orifice plates installed in a conduit with full-flow conditions. The calibration process involves determining the discharge coefficient, which is a crucial parameter for accurately calculating the flow rate based on pressure measurements.
ISO 5167-5 provides guidance on conducting calibration experiments for different types of nozzles and orifice plates, including their design, dimensions, and installation. The standard emphasizes the need for calibration to reduce uncertainties and improve the accuracy of flow measurements.
By following the guidelines outlined in ISO 5167-5, manufacturers, engineers, and operators can ensure the reliable performance of nozzles and orifice plates in various industrial applications, such as in oil and gas, chemical processing, and water management systems. The standard plays a vital role in promoting uniformity and consistency in flow measurement practices, ultimately enhancing the efficiency and safety of fluid handling processes.
iso_5167_5_2003_cone-metersCone meters
Cone meters are a type of flow measurement device used to determine the flow rate of fluids passing through a conduit. They are part of the ISO 5167 series of standards, specifically covered in ISO 5167-6. Cone meters are considered primary devices, meaning they directly measure the flow rate without the need for additional instruments.
The design of a cone meter involves a cone-shaped restriction positioned concentrically within the center of the pipe, with the narrow end of the cone facing upstream. This design creates a pressure difference between the upstream and downstream sides of the cone, which is used to calculate the flow rate.
ISO 5167-6 specifies the geometry and installation requirements for cone meters. It provides guidelines for the accurate use of cone meters in various applications and helps ensure consistent and reliable flow measurements. The standard also addresses the calibration process, emphasizing the need to calibrate cone meters to reduce uncertainties and improve measurement accuracy.
Cone meters are widely used in industries such as oil and gas, chemical processing, and water management. They offer advantages like minimal pressure loss, low maintenance, and suitability for a wide range of flow rates and fluid types. By adhering to the guidelines set forth in ISO 5167-6, operators can achieve accurate and repeatable flow measurements with cone meters, contributing to improved process efficiency and cost-effectiveness.
Cone Meter and ISO 5167-5
ISO 5167 specifies the design and usage of cone meters inserted in a conduit to measure the flow rate of fluids. It’s essential to calibrate cone meters to reduce uncertainty in specific applications, as uncalibrated meters may have higher uncertainties.
This ISO standard provides background information for calculating flow rates and works together with ISO 5167-1 requirements. It’s applicable only to cone meters where the flow remains subsonic and the fluid is single-phase. Uncalibrated cone meters have limits in pipe size, roughness, beta (β), and Reynolds number. It’s not suitable for measuring pulsating flow or for pipe sizes below 50 mm or above 500 mm, with Reynolds numbers below 8 × 10^4 or greater than 1.2 × 10^7.
A cone meter is a primary device consisting of a cone-shaped restriction placed concentrically in the center of the pipe with the cone’s nose upstream. The design includes upstream pressure tappings in the wall and a downstream pressure tapping in the cone’s back face, connected to a differential pressure transmitter.
While alternative designs of cone meters exist, they require calibration as there’s insufficient data to fully characterize them. Calibration follows Clause 7 of the standard to ensure accurate measurements.
Read Also:
- ISO 5167-1 Download PDF – Measurement of fluid flow by means of pressure differential devices Part 1
- ISO 5167-2 Download PDF – Orifice plates
- ISO 5167-3 PDF Download – Nozzles and Venturi nozzles
- ISO 5167-4 PDF Download – Venturi tubes
- ISO 5167-6 PDF Download – Wedge meters
FAQs:
A cone meter is a flow measurement device consisting of a cone-shaped restriction placed concentrically within a pipe. The fluid flows through the cone, creating a pressure difference between the upstream and downstream sides, which is used to calculate the flow rate.
Cone meters offer several advantages, including low pressure loss, minimal maintenance requirements, and suitability for a wide range of flow rates and fluid types. They are also considered primary devices, providing direct flow rate measurements without the need for additional instruments.
The accuracy of cone meters can vary based on factors such as pipe size, roughness, and Reynolds number. To ensure high accuracy, it is essential to calibrate cone meters in accordance with ISO 5167-6 guidelines.
No, cone meters are not suitable for measuring pulsating flow. ISO 5167-6 specifies that cone meters are only applicable for flow that remains subsonic throughout the measuring section and is considered single-phase.
ISO 5167-6 restricts the use of cone meters to pipes sized between 50 mm and 500 mm and for Reynolds numbers between 8 × 10^4 and 1.2 × 10^7. Outside of these limits, other flow measurement methods may be more appropriate.
ISO 5167-5 specifies the geometry and method of use (installation and operating conditions) of cone meters when they are inserted in a conduit running full to determine the flow rate of the fluid flowing in the conduit.
Yes, ISO 5167-5 sets limitations on the application of cone meters. Cone meters are applicable only to flow that remains subsonic throughout the measuring section and where the fluid can be considered as single-phase. They are not suitable for measuring pulsating flow and have specific restrictions on pipe sizes and Reynolds numbers for accurate measurement.