— Class-A Petroleum: Liquids which have flash point below 23oC.
— Class-B Petroleum: Liquids which have flash point of 23 oC and above but below 65 oC.
— Class-C Petroleum: Liquids which have flash point of 65 oC and above but below 93 oC.
— Excluded Petroleum: Liquids which have flash point of 93 oC and above.
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