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1. What are the calibration standards for gas flow meters?
The calibration standards for gas flow meters mainly include four categories: national metrological calibration regulations, national standards, industry standards, and international standards. The specific standard numbers and names are as follows:
1. National metrological calibration regulations - JJG 2064-2017 "Gas Flow Meter Measuring Instruments" - JJG 633-2005 "Gas Volumetric Flow Meter" - JJG 619-2005 "p.V.T.t Gas Flow Standard Device" - JJG 165-2005 "Bell type Gas Spring Collapse Flow Standard Device Calibration Regulations" - JJG 736-2012 "Gas Laminar Flow Sensor" 2 National Standard (GB/T) - GB/T 28848-2012 "Intelligent Gas Flow Meter" - GB/T 32201-2015 "Gas Flow Meter" - GB/T 34041.2-2017 "Measurement of Fluid Flow in Closed Pipelines - Gas Ultrasonic Flow Meter Part 2: Industrial Measurement Gas Ultrasonic Flow Meter" - GB/T 18604-2023 "Measurement of Natural Gas Flow with Gas Ultrasonic Flow Meter" - GB/T 21391-2022 "Measurement of Natural Gas Flow with High bypass Gas Turbine Flow Meter" 3 Industry standards (such as SY/T for petroleum and natural gas) - SY/T 6660-2021 "Measurement of natural gas flow using rotary volumetric gas flow meters" - SY/T 6999-2014 "General requirements for online calibration of flow meters using mobile gas flow standard devices" 4 International and other standards - ISO 9300:2020 "Measurement of Gas Flow with Critical Flow Venturi Nozzles" - UNI EN 1359:2001 "Gas Flow Meter Membrane Gas Flow Meter" - API MPMS 4.8 "Calibration Specification for Volume Tube Flow" - ANSI/ASHRAE 41.7-2025 "Standard Method for Gas Flow Measurement" These standards cover the calibration methods, technical requirements, accuracy
2. 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 the State Administration for Market Regulation and the 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 9249-2023 2015 Standard Name: What is the Failure of the 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 Electrotechnica