Verification Regulations for Vortex Flowmeters

『Verification Regulations for Vortex Flowmeters』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

1. National Standard Specification for Vortex Flow Meter

The national standard specification for vortex flow meter mainly includes the following items

1. GB/T 25922-2023 standard name: "Measurement of fluid flow in closed pipelines using vortex flow meters installed in circular cross-section pipelines filled with fluid." Issued by: State Administration for Market Regulation, National Slag and Rock Standardization Management Committee. Centralized unit: China Machinery Industry Federation. Implementation date: March 1, 2024. Remarks: This standard is equivalent to the international standard ISO 12764:2017 and is applicable to the measurement of fluid flow in closed pipelines.

2. JB/T 9249-2015 standard name: Machinery Industry. Recommended standard supervisory department: Ministry of Industry and Information Technology/National Energy Administration Implementation date: March 1, 2016 Remarks: This standard completely replaces JB/T 9249-1999, Belonging to industry recommended standards

3. JJF (Anhui) 179-2024 standard name: "Online Calibration Specification for Gas Vortex Flow Meter" Scope of application: Applicable to gas vortex flow meters with a diameter greater than DN50mm, used for measuring specific conditions of steam or other gas media, and able to directly display standard flow rate or mass flow rate. Remarks: Not applicable to vortex flow meters without temperature and pressure compensation. Other relevant standards include the International Electrotechnical Commissions IEC 60534 series, Chinas mandatory national standard GB/T 32201-201

5, and the National Metrological Verification Regulation JJG 198.

2. What is the difference between the calibration and verification of vortex flowmeters? The main differences between the verification and calibration of vortex flowmeters are reflected in nine aspects: purpose, object, nature, basis, method, cycle, content, conclusion, and legal effect. Specifically, the purpose is different. Verification: Mandatory comprehensive evaluation of vortex flowmeters belongs to the category of unified measurement values, which is a top-down process of value transmission aimed at ensuring that the measuring device meets legal requirements. Calibration: Evaluate the indication error against the measurement standard to ensure the accuracy of the measurement value. It belongs to the bottom-up value traceability operation, focusing on meeting the internal use needs of the organization. Different verification objects: Only for mandatory verification measuring devices specified in Chinas metrology law (such as vortex flowmeters in trade settlement, safety protection, medical and health, environmental monitoring and other fields). Calibration: For measuring devices that are not subject to mandatory calibration, that is, devices that are voluntarily sent for inspection by organizations. Different types of testing: mandatory, belonging to the scope of legal metrology management, and is a law enforcement act. Calibration: It is not mandatory and is a voluntary traceability behavior of the organization, determined by the user independently. According to different verifications: It must be based on the National Verification Regulations, which are formulated by the national metrological administrative department and have uniformity and enforceability. Calibration: Based on the organizations own "Calibration Specification" or in accordance with the requirements of the "Verifi

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