Do pressure vessels have to use type A pressure gauges?
Thread Content
The current management of equipment is relatively confusing. Some pressure vessels use Class A pressure gauges that are calibrated once every six months, and some use Class B pressure gauges that are calibrated for a long time. I have consulted with other equipment managers and they said that pressure vessels must use Class A pressure gauges. However, after checking the Solid Capacity Regulations 2021, they only require safety accessory pressure gauges and do not specify whether they are required. Does anyone know the regulations in this regard? Or does each company set its own regulations according to its own requirements? :)
There are requirements for pressure instruments in the compulsory calibration catalog. Article 5 of the description is "Measurement of pressure in sealed pressurized vessels." Generally, pressure vessels meet this requirement, and pressure gauges that require compulsory inspection must use Category A. I have never considered this issue before, but for safety reasons, pressure gauges on special equipment should be subject to mandatory inspection. For the pressure gauges we sent for inspection, the testing unit issued a six-month calibration cycle. The above content was also obtained after I inquired.
Pressure gauges used for safety are measuring instruments with mandatory verification and are managed by Level A. However, there are many pressure vessels. Only pressure vessels that are included in the management of special equipment are pressure vessels of special equipment. They must be tested regularly. The pressure gauges on them should be pressure gauges managed by Level A. The rest may not be included. Personal understanding.
I also checked the compulsory calibration catalog. I feel that this thing depends on personal understanding and there is no mandatory requirement. Class B pressure gauges are also compulsory calibration pressure gauges, but the cycles are different. I feel that for safety reasons, I should try to use Class A with a half-year cycle. Thank you for your reply.
Nowadays, pressure vessels are basically included in the special equipment management. Thanks for the reply, we have arranged to send the pressure gauge attached to the pressure vessel for inspection.
Personally, I think that pressure gauge calibration should be carried out in accordance with the compulsory inspection catalog of the General Administration. What the above people said is not entirely correct. Even pressurized containers, if they are not used for safety protection (should be related to interlocks or alarms in the DCS), are classified as display and should not be included in the strong inspection catalog. Second, even for pressure gauges that belong to the compulsory inspection catalog, the General Administration has stipulated that the compulsory inspection method is "periodic inspection", which does not necessarily have to be half a year, one year or according to the equipment maintenance cycle.
Changtong Putuo follows suit* For a moment, I used to only know that the evaporator takes one year and the boiler takes half a year.