For the loading and unloading of liquids such as toluene in tank cars, these tank cars and storage tanks should be equipped with vapor equilibrium pipes; will this mean that exhaust gases won’t be released from the storage tanks?
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For the loading and unloading of liquids such as toluene in tank cars, these tank cars and storage tanks should be equipped with vapor equilibrium pipes; will this mean that exhaust gases won’t be released from the storage tanks? What should be done when a tank truck has less and less material left and ends up filled with gas? How can that gas be removed?
Both tank trucks and storage tanks should be equipped with vapor balance pipes, which serve to maintain equal air pressure inside and outside the tank truck or storage tank, preventing the formation of vacuum or overpressure and thus ensuring safe loading and unloading. However, the vapor equilibrium tube cannot completely prevent the leakage of exhaust gases; therefore, protective walls and ventilation systems are installed around the storage tank to allow the exhaust gases to be discharged promptly and treated. When the tank truck is filled with liquid, some gas may remain inside, and this needs to be dealt with through ventilation and venting. The specific procedure is as follows: First, open the vent valve on the vapor equilibrium tube to release the residual gas ； Then open the vents and exhaust ports inside the storage tank to release the gas. Safety must be considered during the emission process to prevent accidents caused by sparks or static electricity. .
Tank trucks inevitably contain a certain amount of gas, which is either released naturally over time or collected collectively using specialized equipment.