Although the Cellulosic curve has been in use for many years, it soon became apparent that the burning rates for certain materials e.g. petrol gas, chemicals, etc, were well in excess of the rate at which, for instance, timber would burn. As such, there was a need for an alternative approach for the purpose of carrying out tests on structures and materials used within the petrochemical industry, and thus the Hydrocarbon curve was developed.
The Hydrocarbon curve is applicable where small petroleum fires might occur, i.e. car fuel tanks, petrol or oil tankers, certain chemical tankers, etc. In fact, although the Hydrocarbon curve is based on a standardized type of fire, there are numerous types of fire associated with petrochemical fuels.
The temperature development of the Hydrocarbon (HC) fire curve is described by the following equation: T = 20+1080*(1-0,325*e-0,167*t-0,675*e-2,5*t).