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Regular inspections of pressure gauges are generally carried out once a year, while mandatory inspections are usually done twice a year

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The calibration cycle for pressure gauges is 6 months, as specified in the regulations: (

1. Regularly check the pressure transfer pipelines, valves, joints, and welds for any leaks. If so, it should be eliminated promptly. 2. Conduct regular inspections at fixed times and locations to check the integrity of the instruments and keep them clean; special attention should be paid to the reading on the pressure gauges. If the indicated value differs significantly from the normal process value, a qualified pressure gauge of the same model and specification can be installed to make a comparison. If the pointer remains stationary at one position, the valve in front of the pressure gauge can be opened to see if there is any change in the pointer. If there is no change, it may be that something is blocked somewhere in the pressure guiding system. In particular, the dampers are prone to getting clogged. If the pointer swings frequently and with a large amplitude, the valve in front of the pressure gauge can be turned down slightly to allow the pointer to swing only a little. 3. The pressure gauge installed at the pump outlet should be protected from damage caused by sudden pressure surges; therefore, when starting the pump, the valve in front of the pressure gauge must be closed first, and it should be opened slowly only after the pump has started running. This requires special attention for pumps that are started frequently. 4. For recording pressure gauges, the recording paper should be replaced regularly and the recording ink should be added. If the pen tip is clogged and water doesn’t flow through it, you can clean the tip with alcohol or use a fine steel needle to clear it. Gauge driven by a clockwork mechanism to move the recording paper needs to be wound regularly, taking care not to wind it too tightly to avoid breaking it. 5. For pressure gauges with live contacts, it is necessary to regularly check whether the signaling device is malfunctioning. Inspection method: Turn the adjustment screw to bring the upper and lower limit setting pointers into contact with the indicator pointer respectively, and observe whether the indicator light turns on and whether the bell sounds. During the inspection, it is necessary to contact the operator in advance to avoid misunderstandings. 6. Pressure measuring instruments equipped with venting, drainage, and dust removal devices should have their vents cleared, fluids drained, and dust removed on a regular basis. 7. All operating pressure gauges must be calibrated regularly, usually every 3 to 6 months.

Original poster, don’t you know the calibration cycle for pressure gauges? In fact, all of our instruments have a calibration cycle. Process instruments are generally inspected once a year, but in many cases it is done as part of major overhauls. Gauge pressure meters also need to be inspected once a year, while those subject to mandatory inspection must be checked every 6 months. Every workshop and every factory must have a dashboard ledger. It must also be calibrated by a qualified institution. I used to be in the mechanical department responsible for measurements, and that pressure gauge annoyed me terribly every year. The on-site pressure gauge is used in the process workshop pipelines, usually by the fitter team. Every time I go to remove the pressure gauge, they ignore me, so I have to do it myself. NND. There are also frequent inspections from higher authorities – quality system certifications, re-inspections, and all the records related to instruments have to be checked!

The quality of pressure gauges is a serious issue these days; it’s necessary to choose products from reputable manufacturers.

Our factory doesn’t replace its equipment unless it’s broken. 1\* As per the regulations, inspections must be carried out. 2\* There are too many pressure gauges; foreign companies require low costs. If I ask for regular inspections, it would cost me my job. Thank you anyway!

The main reason the pointer reaches the maximum value is that the valve is opened and closed for too short a time.

There’s a problem as soon as the liquid sprays out! It’s either a selection issue or a quality issue. Well, we can be sure that the medium is coming out from inside and outside the pipe; the leak must be caused by a broken pipe or a leakage at the weld. The medium has entered the watch case through the connector! There are two reasons for this issue: 1. When you open the valve quickly, the pressure gauge shows a sudden spike in pressure; it is recommended to install a damping screw inside the connection (this is provided by reputable manufacturers, but not by smaller ones), or to open the valve slowly. 2 means you have set the pressure too low.