翻译活动讨论（1）？ liquid transfer from other vessels, tank trucks, and tank cars may be aided or accomplished entirely by pressurization of the supply vessel with a gas, but the receiving tank may counter a flow surge at the end of the transfer due to vapor breakthrough. depending on the pre-existing pressure and free head space in the receiving tank, the additional gas volume may be sufficient to overpressure the tank. the controlling case is a transfer that fills the receiving tank so that little head space remains to absorb the pressure surge . a similar situation can be encountered during line pigging if a vapor chaser is used after the pigging device. ．．．．， 但接收罐在传输结束时由于蒸汽的突然冲击可能会有反向的涌动。 基于接受罐中的已有压力和自由水头空间， 突然进来 的气体体 积 ．．．．．， 控制物件是一个供接受罐的输送器，所以没剩余压头空间来吸收压力波动 。 如果管道猪是用蒸汽驱动的话，类似的情况能在管道清洁中遇到。 查看更多
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