On the identification of major hazard sources
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The criteria for identifying major hazard sources are currently Document No. 56 and GB18218-2000; however, these two standards differ from each other. Which one should be used as the basis for identification in practice? It’s really headache-inducing. For example, in the case of ammonia, the critical value specified in GB18218-2000 is 40 tons for production sites and 100 tons for storage sites, considering it a toxic substance. Document No. 56 specifies that for combustible gases with an explosion limit greater than 10%, the threshold is 2 tons at production sites and 20 tons at storage sites. In that case, many enterprises involved in ammonia refrigeration would essentially constitute major hazard sources, which seems a bit unreasonable. According to GB18218-2000, sometimes people suggest that standard No. 56 should be followed instead.
According to Document No. 56, the feasibility of implementation is low; a few attempts were made in the past, but after that Document No. 56 was hardly applied anymore
This issue has been discussed many times on the forum; LZ can search for it by themselves. In short, GB18218 is used for identification. Use Document No. 56 for declaration. Identification and declaration are not the same thing!
The Jiangsu Provincial Work Safety Administration has issued documents requiring identification in accordance with GB18218