How to prevent LNG tankers from being misused?
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Is there any way to prevent overflow during LNG loading?
Just install a level switch on the tank truck.
It is recommended to use a quantitative loading system, as required by the regulations as well; this can effectively prevent overloading of tank trucks
Reply to 3# chenglaiyin: I’m afraid my knowledge is limited; I don’t quite understand the question posed by the original poster – overflow during LNG loading? Is it liquefied (cryogenic) natural gas or compressed natural gas? Both of these LNG loading methods should be done in a closed system (gas-liquid two-phase); what does overflow even mean? The answers given by the two fellow travelers upstairs are applicable to substances that are in a liquid state at normal temperature and pressure; it’s not clear whether they apply to LNG as well.
Reply to 4#: It is difficult to measure LNG in the transfer arm due to the presence of a gas return pipe, and quantitative control presents issues. There is a level gauge on the tank truck, but no signal output.
LNG tankers are equipped with level gauges, and like tankers for liquid ammonia and liquefied gas, they have a certain filling coefficient. During loading, the driver watches from nearby, as he is the one who knows best how much has been loaded. There’s no need to worry about this.
Each tank truck is equipped with a tank truck usage permit, and an IC card specifying the allowable filling weight. Filling begins by swiping the card at the batch controller until the specified amount is reached; once that is achieved, the controller automatically closes the valve. That’s it
Reply to 5# wwscq: That brother gave a good answer; customers certainly wouldn’t want to do that.
LNG loading is similar to LPG loading; there is no issue of overflow during loading, only the problem of overfilling. In normal operations, it is determined by the driver and the escort keeping an eye on the liquid level in the tank truck at all times.
Each tank truck is equipped with a tank truck usage certificate, and the IC card specifies the filling weight; filling begins by swiping the card at the batch controller until the specified amount is reached, after which the controller automatically closes the valve. Is what was mentioned on floor 7 referring to an intelligent volume-control loading system? ? Which manufacturer is producing it? Could you reveal that?
The loading batch controller used in our company is from Shanghai Gaochuang; they are responsible for its installation, commissioning, and training