In this process, is it necessary to install a safety valve on the pressure vessel?
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This post was last edited by Xiaoxiao Chemical Engineer on 2019-3-15 09:07. The editing process is as follows: I would like to ask everyone, the buffer tank B in the first section is a pressure vessel. This is no problem, but does it need to be equipped with a separate safety valve? Please discuss. If you need to add any questions, please ask again to discuss, thank you.
Because the operating pressure of the air compressor is less than the design pressure of buffer tank B, there is no need to add a safety valve.
Buffer tank AB can be regarded as a pressure vessel group. Buffer tank A is equipped with a safety valve, so buffer tank B does not need to be equipped with a safety valve.
Experts say that the air compressor station is too far away from the work section and a safety valve needs to be installed. This is a bit unreasonable, right?
Buffer tank A already has a safety valve, and buffer tank B will not cause pressure due to misoperation due to other reasons, so there is no need to configure a separate safety valve~
The setting of the safety valve must take into account many overpressure conditions. If a fire occurs only around B, the pressure of B may be too high.
The first point of Article 9.1.2 of TSG-21: Pressure vessels within the scope of application of this regulation should be equipped with overpressure relief devices according to design requirements. When the pressure source comes from outside the pressure vessel and is reliably controlled, the overpressure relief device does not need to be installed directly on the pressure vessel. In this picture, the pressure source comes entirely from the air compressor. If the air compressor safety valve setting can meet the discharge requirements of the air compressor, then buffer tanks A and B do not need to be equipped with separate safety valves, and buffer tank A has a safety valve, which is more reliable.
To press. Are filling A and filling B just connected by pipes without valves?
There is a valve, but it is always open.
Even if a normally open valve is mistakenly closed because the pressure source comes from in front of the valve, it will not cause overpressure in the pressure vessel, so this equipment does not need to be equipped with a safety valve.