Phenol in solid form is originally of Category C, but it turns into a liquid when the temperature rises; after that, it is fed into the reactor for a high-temperature reaction
Thread Content
Phenol in solid form originally belongs to Category C, but it turns into a liquid when the temperature rises; after being fed into a reactor for high-temperature reaction, should its fire hazard then be classified as Category A?
At normal temperatures, it is classified as a Class C substance due to its high flash point as a combustible solid; at higher temperatures, it first transforms into mist droplets, and its fire hazard becomes that of a Class B substance. At even higher temperatures, it vaporizes and turns into a gas, with an explosion limit of less than 10%, which classifies it as a Class A substance. Is this analysis correct?
Phenol has a flash point of 85°C; according to petrochemical regulations, operating temperatures above 85°C are considered to be those of Category A liquids
Well, when it is vaporized and turns into a liquid, Category C becomes Category B; the key point is that at higher temperatures it vaporizes again. Since its lower explosion limit is less than 10%, it must be classified as Category A, right?
Class A gases refer to those that are gases at room temperature, and do not mean gases that become gaseous when heated