About safety valve calibration management
Thread Content
1. Why are spring direct load safety valves installed on pressure vessels with toxic, harmful, flammable, and explosive media not allowed to undergo online verification? 2. Why are lever safety valves and dead weight safety valves generally not suitable for calibration in the calibration laboratory?
1. In order to prevent safety accidents. 2. In order to prevent the calibration value from deviating due to position changes during transportation.
* * Are there any relevant management regulations?
1. Why are spring direct load safety valves installed on pressure vessels with toxic, harmful, flammable, and explosive media not allowed to undergo online verification? answer: Online verification means that toxic, harmful, flammable, and explosive gases or liquids are released on site. Can you see what the release pressure is? Can you still be there? 2. Why are lever safety valves and dead weight safety valves generally not suitable for calibration in the calibration laboratory? answer: The lever safety valve can be calibrated in the calibration room, and the counterweight can be added after arriving at the site. Considering the transportation process and installation process of static weight safety valves, it is not easy to verify in the calibration room.
“answer: Online verification means that toxic, harmful, flammable, and explosive gases or liquids are released on site. Can you see what the release pressure is? Can you still be there? ” I beg to differ. Online calibration does not use medium gas, but nitrogen!
1. Why are spring direct load safety valves installed on pressure vessels with toxic, harmful, flammable, and explosive media not allowed to undergo online verification? Isn’t this asking for trouble? It’s either poisoning or explosion. 2. Why are lever safety valves and dead weight safety valves generally not suitable for calibration in the calibration room? How to ensure accuracy after transportation or experimentation
I completely agree with the point of view of my friend on Floor 2#, and there are also relevant regulations for this to be checked.； Right now: Article 7 of Annex 3-4 of TSG R7001-2004 "Periodic Inspection Rules for Pressure Vessels".