The medium is an extremely hazardous pressure vessel. Can the bursting disc be used alone?
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GB150.1-2011 B.5.3 clearly requires that bursting discs cannot be used alone in situations where the toxicity of the discharge medium is extremely, highly hazardous or explosive, such as liquefied petroleum gas, etc., and can be used in combination with safety valves in these situations. However, in GB 567.2-2012 4.2.1 b), for occasions where the design does not allow trace leakage of the medium in the container, a bursting disc should be used alone as an overpressure relief device. Then the question comes: For media with extremely toxic and highly hazardous levels, trace leakage is definitely not allowed. So based on the above two standards, can bursting discs be used alone? :dizzy::dizzy::dizzy:
1. The scope of application of the two standards is inconsistent； 2. GB 567.2-2012: According to Announcement No. 7 of 2017 and the conclusion on the integration and streamlining of mandatory standards, starting from March 23, 2017, the standard was converted into a recommended standard and is no longer mandatory. Personally, I think it’s GB150.
Thanks for the reply. I also think it’s 150:), but since there are different and even contradictory double standards, when this issue is discussed, there will still be two voices, and it is difficult for each to convince the other.
The first is that these two standards are not contradictory at all. GB567 stipulates that in working conditions where trace leakage is not allowed in the design, the bursting disc safety device should be selected separately. This standard means that the safety valve safety device cannot be selected separately in this working condition. The safety valve has poor sealing and may leak. ； The provisions of GB150 are relatively specific. Once the toxicity level is extremely hazardous, highly hazardous or explosive and liquefied petroleum gas, etc., a series device of bursting disc and safety valve should be used. The bursting disc is in the front and the safety valve is in the back. If the bursting disc is in the front first, it ensures that the medium does not leak. ； Even if overpressure causes the bursting disc to burst, and there is a safety valve blocking it behind, a large amount of medium will not leak into the air and cause harm to the surrounding environment.
Thanks for the reply. Micro-leakage is not allowed for media with extremely hazardous or highly hazardous toxicity. This is in line with the conditions for the use of bursting discs alone in GB567. However, GB150 clearly stipulates that media with extremely hazardous or highly hazardous toxicity are not allowed to use bursting discs alone. It seems that the provisions of these two standards on the separate use of bursting discs are completely inconsistent.
GB567 is the safety standard for bursting discs, which only involves bursting discs. GB150 is the standard for pressure vessels. The emergency relief devices involved include safety valves, bursting discs, safety valves + bursting discs, etc.
I feel like what you said makes sense, but I always feel that there is an authoritative conclusion missing. :lol