Extremely and highly hazardous media
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With the implementation of HG/T20660-2017, the number of extremely and highly hazardous media has increased. The original benzene, sulfuric acid, hydrochloric acid, hydrogen sulfide, etc. were all moderately hazardous media, but now they are all extremely and highly hazardous media. When classifying pressure vessels, the medium category should be based on HG/T20660-2017 or HG 20660-2000. (The reference in TSG 21-2016 is HG 20660-2000)
HG/T20660-2017 implemented? Is there an electronic version?
New Standard, where to buy.
It seems to be implemented soon, but I haven’t seen it online.
After taking a look, I was curious why fluorine and hydrogen fluoride are only highly hazardous rather than extremely hazardous. .
This post was last edited by chachacn on 2017-10-11 17:03 for personal understanding. . If the version number is clarified in the specification, it means the specified version, not the latest version. It is the same as ASME. So it’s still the 2000 version
I personally understand that using the latest standard is the most stringent of the two for safety reasons.