Gas alarm settings
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I would like to ask everyone: if it is possible for toxic gases and flammable gases to coexist in a pipeline or equipment, can we choose just one type of alarm device? This would allow us to save a significant amount of money. Is this approach permissible according to the principles in place?
Toxic gases and flammable gases can actually be the same type of gas; for example, CO falls into this category. I haven’t seen any specific regulations on this, but I think it should be measured according to the standard related to the lower hazard threshold.
Refer to GB50493-2009 \"Code for Design of Detection and Alarm Systems for Flammable and Toxic Gases in Petrochemical Industries\"
But in some open areas, it’s very difficult to conduct tests and calculations for this concentration. Is there any way around this?
The open area is equipped with sensors that have multiple measurement points, arranged in a distributed manner. If it still can’t be detected in this way, it means the ventilation is good and no testing is necessary: lol
With good ventilation, the risk level is relatively lower, and there are also fewer safety hazards; you can take a look at how to choose the installation location for the alarm
Although toxic gases share similarities with flammable gases, in principle one should not choose only one type
Some have a header with two types of probes
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