Calibration issues for pressure gauges and temperature measuring instruments
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In accordance with the rules for regular inspection of pressure vessels and pressure pipelines, both pressure gauges and temperature measuring instruments need to be calibrated regularly. Which specific pressure gauges and temperature measuring instruments are required to be calibrated on a regular basis? Are there any specific specification guidelines?
All of our pressure gauges are calibrated every six months, while temperature measuring instruments are calibrated once a year
In that case, doesn’t that mean the pressure gauges at both the inlet and outlet of the pump need to be calibrated as well?
But that’s just how the regulations stipulate it; it doesn’t clearly specify the scope for which mandatory inspection is required If it is included in the \"List of Working Measuring Instruments Subject to Mandatory Verification under the People’s Republic of China\", then it needs to be calibrated; otherwise, no calibration is required. In that case, there are regulations regarding pressure gauges, but no such regulations exist for temperature measuring instruments! !
All measuring instruments need to be inspected or calibrated. For those that are subject to mandatory inspection, they must be inspected by a metrological testing institution qualified to carry out such inspections, in accordance with the relevant inspection procedures; other instruments can be inspected or calibrated by themselves or by entrusting an external agency to do so, following the appropriate inspection or calibration standards； Such as JJG 52-2013 \"General Regulations for the Calibration of Pressure Gauges\", JJG617-1996 \"Digital Temperature Indication and Regulation Instruments\", etc....
Can it be understood that the requirements for the calibration of pressure gauges and temperature measuring instruments specified in the rules for regular inspection of pressure vessels and pressure pipelines apply to those pressure gauges and temperature measuring instruments that are subject to mandatory calibration?
Pressure vessels are under the supervision of special equipment inspection and testing agencies, while measuring instruments such as pressure gauges are under the oversight of metrology verification agencies; these are two distinct organizations. Measuring instruments subject to mandatory verification are specified in the Measurement Law; they are those used in the areas of safety protection, medical and health care, environmental monitoring, and trade settlement, and are included in the **List of Instruments Subject to Mandatory Verification.