Classification of the fire hazard of calcium cyanamide and interpretation of building codes
Thread Content
The fire hazard of calcium cyanamide is controversial; Category A: it meets the criteria for Category A, Item 4 of stored materials； Category B: Does not fully meet the criteria specified in Article 4 for Category A storage items ； Regarding the interpretation of the regulations: “The classification of Class A storage items is primarily based on Class I flammable solids as defined in China’s ‘Rules for the Transport of Dangerous Goods’…” (Please refer to the regulations themselves.) The question is, what are the criteria for identifying substances that burn when in contact with water and belong to Class I? The Rules for the Transport of Dangerous Goods don’t mention this at all; could it be that the construction regulations are talking nonsense? . If the classification criteria are known and it can be shown that calcium cyanamide does not belong to Class I substances that catch fire upon contact with water, then it can be proven that calcium cyanamide does not belong to Category A. Calcium cyanide is a substance that burns when in contact with water, but it is not known what category it falls into. What are the criteria for classifying substances as Class I substances that burn when in contact with water? The Rules for the Transport of Dangerous Goods make no mention of this at all
Category A, no objections. This is the typical scenario of taking the wrong path and then refusing to back off, leading to self-destruction. Do you have direct data to prove it does not fall under Category A, Article 4? Standards form a series; building codes require the support of other standards. Since we don’t have data on various materials available, we can refer to any standards related to chemicals and hazardous substances ； Specifications for both expired and No expired items can be referred to. The simplest way is to check the old version of 13690, and then compare it with the new version of the hazardous chemicals catalog and list of dangerous goods; perhaps that will help you understand.
I still don’t quite understand. Can you be more direct?
Agreed, typical Category A, Item 4
Not many people study calcium cyanamide.
Are there any users who have studied the downstream product, guanidine salts?
May I ask the original poster, under which fire classification was calcium cyanamide designed for? . . .