Is the density of the toxic gas hydrogen fluoride less than that of air, and how should it be installed on-site?
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This post was last edited by w986177019 on 2018-7-11 10:14. I don’t know how to compare; refer to 50493-2009
Just compare the molecular weight of the component with that of the average air molecule. What else is there called toxic hydrogen fluoride...? Is that how Chinese is spoken everywhere there?
I made a mistake with just one key; it has been corrected. Toxic gas: lol
It is designed to have a density lower than that of air, and should be installed at a height of 0.3~0.6m; how does this compare to 0.97?
How to determine whether the flammable and toxic gas being tested is lighter or heavier than air? https://bbs.hcbbs.com/thread-773480-1-1.html (Source: Haichuan Chemical Industry Forum)
Relative vapor density is 1.27 – isn’t that greater than that of air?
It’s clearly stated in the screenshot you shared: the threshold is a density of 0.97. Calculating it, HF has a density of less than 0.9, so it is lighter than air
Mm. Let’s discuss it. Let’s learn! ! ! The original self-control standard of 0.7 is no longer valid; it no longer exists under 20507-2014
You’re not familiar with these specifications; the 0.7 you mentioned refers to specific gravity, right? The calculations still show a value less than 0.7, so there’s no contradiction
Using a simple comparison method, if the molecular weight is greater than 29, it is considered heavier than air; if the molecular weight is less than 29, it is considered lighter than air.