What is the clamping force of the tank truck sealing cap?
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I would like to know: for the sealing caps of oil tank trucks, what minimum vapor pressure inside the tank can be ensured once they are tightened?
This issue is quite complex; it mainly depends on the layout of the materials and pipelines. Generally, the loading pressure for gasoline and diesel is less than 1 MPa, usually around 0.7 MPa; therefore, the backpressure should not exceed this value. The pressure varies depending on the backflow pipeline resistance and the discharge method (air discharge or connection to an oil and vapor recovery unit). According to professionals in oil and gas recovery, the pressure in the return pipeline should be 0.1 kilogram higher than their automatic startup pressure. It’s best to take specific measurements.
The question raised by the original poster seems to be related to the design pressure of the tank truck. According to some information, it is 20 kPa; I haven’t paid close attention to the details, so this is just for reference.