Distinguishing between mandatory and voluntary inspection for instruments in chemical plants
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Gentlemen! I’m not clear about one thing: there are numerous instruments in chemical plants. How can we determine which of them need to be sent to the metrology bureau for calibration, and which ones do not? . I’ve been working for many years now, but I’m still confused. When the leader asked why no distinction was made and how the choice was made, they were unable to answer and tried to shirk responsibility by saying that it had been decided that way by the previous person in charge. Could everyone please provide specific examples from other factories to illustrate this? **The specifications are written too vaguely, for example regarding the measurement of toxic and harmful substances. Almost all products in our factory are toxic and harmful; it’s not possible to test them all, as there are just too many. Kind sir, if you have any good suggestions, could you please send them via email to: 89223462@qq.com
The items we send for testing here include pressure gauges, bimetallic thermometers, thermal resistors, thermocouples, and flow meters for measurement purposes.
In accordance with Article 9 of the Metrology Law, it depends on the usage situation.
Follow the **guidelines; if it’s not clear, refer to the explanatory notes in the guidelines.
Mandatory verification for use in trade settlement, security protection, environmental monitoring, and energy management, with a statutory inspection cycle； Equipment that is not subject to mandatory inspection and for which no calibration tasks are carried out by this unit still needs to be sent for inspection, although the interval can be determined by the user.
And the most important point is, how do you find a reasonable balance between technical limitations, usage requirements, and local inspection standards. There are no textbooks or anyone to help you; you have to rely on yourself.
Gauges on pressure pipelines, flammable gas detectors, toxic gas detectors, and precision instruments in laboratories require mandatory inspection; flow meters, on the other hand, need to be inspected only if necessary or as dictated by production requirements.