How to calibrate the safety valve of a steam boiler?
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How to calibrate the safety valve of a steam boiler?
Take it off and take it to the inspection facility for testing; for systems that operate over long periods of time, it is common to use two or more safety valves, which need to be removed one by one for inspection
Are there any regulatory requirements that mandate online inspection? Is it still possible to conduct offline testing during the shutdown period?
Our boiler is an emergency boiler, which remains in a cold standby state at normal times. It can be taken apart for inspection, but some people believe that offline inspection is inaccurate – is there any theoretical basis for this?
By checking the contents of the \"GB50273-2009 Code for Construction and Acceptance of Boiler Installation Projects\", no special emphasis is placed on this
Spend some money for an online verification service – it’s convenient. Otherwise, you have to wait until the machine is shut down, disassemble it yourself, reassemble it, and handle the transportation back and forth, which is really troublesome.
How can the impact on water level and pressure be ensured during online calibration? What should be done if it doesn’t seal properly after being reset?
Under normal and stable operating conditions, during online calibration, the safety valves are not opened fully; instead, only an additional pressure is applied to cause the safety valves to move slightly. In our case, there has been no situation in which the safety valves opened completely, leading to abnormal boiler pressure. If it does not close properly, it indicates a fault with the safety valve, and the machine needs to be stopped for replacement.