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1. Institutions capable of conducting flow velocity testing
Institutions with flow velocity testing qualifications mainly include national metrology institutes, metrology testing research institutes under provincial market supervision bureaus, and third-party testing laboratories certified by CNAS. The China Institute of Metrology and various provincial and municipal metrology and testing technology research institutes are equipped with ultrasonic flowmeter calibration devices, standard volume method water flow standard devices, etc. They can carry out on-site or laboratory testing in accordance with JJG 1033-2023 "Electromagnetic flowmeter calibration regulations" and other regulations. Some universities, such as the Fluid Mechanics Laboratory of Tianjin University and the Institute of Thermal Energy Engineering of Zhejiang University, also undertake testing services for industrial pipeline flow velocity distribution externally. Third party organizations with CMA qualifications, such as SGS, CTI, and Guangdian Metrology, provide calibration of DN15-DN3000 caliber flow meters, PIV measurement of pipeline flow velocity fields, and systematic error assessment in the petrochemical, water, and power industries. The testing report can be used for acceptance, measurement traceability, and energy efficiency audit. Attention: Before testing, it is necessary to clarify the type of dielectric material (water, steam, gas, etc.), operating parameters (temperature, pressure, Reynolds number), and installation conditions. Different principle instruments (electromagnetic, vortex, ultrasonic, Coriolis) correspond to different testing methods and uncertainty requirements.
2. Experimental report on flowmeter calibration
3. Does it have any impact if the vortex flowmeter is applied for mandatory testing but not sent for testing according to regulations, and instead tested at a non designated institution?
If the vortex flowmeter is applied for mandatory testing but not sent for testing according to regulations, it will bring various adverse effects.
1. Legal Risks of Violating Metrology Regulations 1 Mandatory calibration of measuring instruments should be carried out by legal metrological calibration institutions or authorized institutions. Sending instruments for self calibration to non designated institutions is a violation and may face warnings and fines from regulatory authorities. It may also affect the recognition of enterprise metrological qualifications. When it comes to mandatory calibration scenarios such as trade settlement and security protection, flow meter data that has not been calibrated according to regulations has no legal effect, which may lead to transaction disputes, inability to protect rights, or security risks caused by inaccurate data.
2. Loss of dust effectiveness in measurement data 1 Testing reports issued by non designated institutions are not recognized by regulatory authorities, and flow meter measurement data cannot be used as legal measurement vouchers. There may be loopholes in the internal measurement management system of the enterprise. When used for production process monitoring or energy measurement, flow meter data that has not been legally verified may have no guarantee of accuracy, which may lead to production parameter loss of control, energy statistics distortion, and affect enterprise operation decisions.
III. Difficulties in Subsequent Verification and Mana
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