Where can I find the maximum allowable concentration of CO in mg/m3?

You can check it on the safety culture website.

If it is already known that the CO concentration in a certain area could reach as high as 1000 mg/m3, then of course it is necessary; the two values in the table are only 20 and 30, while this concentration is close to being harmful outright. I think the maximum allowable concentration is on the same order of magnitude as those 20 and 30 values

We all think the same way, but currently the owner is sticking to the maximum allowable concentration shown in the second diagram above. He claims that no maximum allowable concentration can be determined for CO, so there’s no need to install CO detectors. What we need now is a good reason to convince the owner. .

We all think the same way, but currently the owner is sticking to the maximum allowable concentration shown in the second diagram above. He claims that no maximum allowable concentration can be determined for CO, so there’s no need to install CO detectors. What we need now is a good reason to convince the owner. .

It seems that there isn’t much focus in the design documents on industrial hygiene and safety, etc.: lol How is it possible that there are no regulations regarding toxins like CO? ? Follow the clues and find it by yourself. . . . As for alarm settings, the text in red is taken from GBZ1-2002, 6.1.6.1: Detection and alarm points shall be installed at work locations where toxic gases exist, are produced, or are used, in accordance with the requirements of GBZ/T233. Such points should also be established in workplaces where highly toxic or extremely toxic gases may be released, as well as in those where other toxic gases may be released in large quantities or accumulate easily. Besides, with such a high concentration, it’s absolutely necessary to set up an alarm; go ahead and do it right away. . .

Dude, you have such a comprehensive collection. . It’s really unfortunate regarding NX – I could only find GBZ 2.1. The project is located in a coastal area, so it certainly doesn’t fall under the category of high-altitude areas; therefore, there are still no data available regarding the maximum allowable concentration. . The other standards later on are somewhat more detached from the chemical industry. .

There are many types of allowable concentrations for toxic and harmful substances. In low-altitude areas, CO does not have a maximum allowable concentration; instead, there are other allowable concentrations. This is a typical application of medical and physiological knowledge in industry. So there’s no need to worry about it; it can be understood as follows: the maximum allowable concentration is closely related to altitude and exposure time. I have worked on projects in Qinghai, and the local industrial hygiene authorities advised that in high-altitude areas, where the air is thin and breathing is difficult, even small amounts of CO (which have little effect at low altitudes due to the high oxygen concentration) can lead to a significant increase in interaction with hemoglobin. As a result of the reduced blood oxygen concentration, CO poisoning in high-altitude areas causes severe damage to the body very rapidly, far more so than at lower altitudes. Therefore, maximum allowable concentrations were established. At low altitudes, however, because of the high oxygen concentration, a considerable amount of time is required for CO to cause poisoning, and concentration is not the main factor determining the severity of the effects. In other words, the maximum allowable concentration is only meaningful in high-altitude areas, due to the specific binding mechanism between CO and hemoglobin in the blood; it makes no sense to focus on CO concentration limits in low-altitude areas. Is that clear enough? :lol

To reiterate, the allowable concentrations of toxic and harmful substances are unrelated to specific industries; they are related solely to human life. Therefore, most of the regulations are based on research findings from life sciences (medicine, pathophysiology, pharmacology, toxicology, etc.). Thus, there is no need to worry about so-called standards specific to the chemical industry. Occupational disease hospitals serve patients, not industries, and there are no specialized industry-specific hospitals in the chemical industry. Industrial hygiene focuses on humans and the harm that industries cause to them, not on the industries themselves. :lol

Thanks, buddy. We actually think it’s necessary to install sensors, but the property owner believes, based on past experience, that it’s not necessary. Let’s talk more about it and see. Thanks!

May I ask, are your owners aliens? It is possible to reach 1000 ppm, which is 33+ times above the permitted level~~~ And it is still acceptable not to set up any alarms.................