The Calculation on the Oil and Gas Concentration for Rail Tanker

It is necessary to carry out ventilation to rail tanker before its cleaning. The ventilation processes are studied both for the case of without-remnant of oil and with-remnant of oil in this paper. The formulas, which describe the variation of concentration of oil and gas with time, are inferred. These formulas play an important role in determination of time needed to carry out ventilation before the cleaning of rail tanker.