Vapour Pressure is a key physical parameter used in gasoline specifications. Vapour pressure determines the ease with which the fuel is vapourised within a combustion engine as well as the amount of vapour created during filling operations. Gasoline regulations often specify a higher vapour pressure during the summer to reduce vapour emissions at gasoline retail stations.
The Variable Cost of production is calculated here as the net cost of all materials (feedstocks less co-products) plus utility costs associated with the plant operation, and are presented per ton of main product. Sales realisation of the main product are not included in the variable cost calculation.
Variable Cost Margin
The Variable Cost Margin is the margin achieved over net raw material and utility costs from sales realising the netback value at the plant gate. Petrochemical producer cannot run plants at a negative variable cost margin for any significant length of time, unless cash is available from other sources to fund feedstock and utility costs.