Calculate the number of minutes remaining in an oxygen tank based on tank size, pressure and continuous flow rate.The following equation is used to determine the remaining duration of flow:Duration of Flow = Oxygen Tank Conversion Factor * (Remaining Tank Pressure - Safe Residual Pressure) / Continuous Flow RateOxygen Cylinder Conversion Factors D Tank = 0.16 E Tank = 0.28 G Tank = 2.41 H/K Tank = 3.14 M tank = 1.56Safe Residual Pressure = 200psi。