Doubts about the installation of toxic gas detection in warehouses
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I have a question: If a warehouse stores toxic liquids (epichlorohydrin) in barrels, how should toxic gas detectors be installed? According to GB 50493, if one probe is used for every 1 meter of radius, the entire warehouse would be covered with probes, which is not practical. What are your thoughts? Have you encountered similar projects where this approach was used?
It’s useless no matter how much you think about it or talk about it. For something like this, you need a qualified design institute to carry out the design for you. The design institute said to install as many as needed. You don’t have the qualifications; even if you install a hundred, it won’t work.
Starting from the source of leakage, the areas where leakage is likely to occur. For example, valve assemblies, flanges, etc.
There are standards for this. Check the gas alarm design specifications. There is a requirement for spacing
GB 50493-2009 4.2.2 When combustible gas emission sources are located in enclosed or semi-open workshops with poor local ventilation, a detector can be installed every 15 meters; moreover, the distance between such a detector and any emission source within its coverage area should not exceed 7.5 meters. The distance between toxic gas detectors and emission sources should not exceed 1 meter. It is important to note that the distance between toxic gas detectors and emission sources must not be more than 1 meter
Poor standards! Ugh, who would give me a book like that? I’d use it to wipe my butt if I had to; I’m not afraid of hard paper or dirty writing
There’s a source of release – a pile of barrels, covering an area of 2×5=10 square meters with a height of 2 meters. Who can tell me which point should be used as the reference point for measuring that 1-meter distance specified in the standards? Who can tell me how many toxic gas detectors are needed to be installed around this pile of barrels?
\ud83d\udc37 – That guy is great, but the person in charge of checking just follows the instructions without caring about you
Note that the specification requires it not to exceed one meter; however, it is acceptable if it exceeds one meter, subject to the drawings provided by the design institute. If the area is small, fewer detectors should be installed; if the area is large, more detectors are needed. It’s sufficient to follow common sense. For example, if you have designated a storage area, install detectors around it. There’s no need to install detectors in the middle, where buckets are kept. The operating procedures state that during regular inspections one should not cross the warning lines in the storage area; if crossing those lines is necessary, then a portable detector must be used.
The toxic flammable gas detector has a detection range of two meters, which means it can detect gases within that two-meter distance; check how many leakage points you have. It’s best to set a few of these so the design institute can decide.