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. 改译：从其它容器、罐车和槽车输送液体完全可以通过气体对供给容器加压来辅助或实现， 但在输送末期由于气体窜入，接收罐可能会发生流量波动 。基于接受罐中的已有压力和顶部自由空间，此额外的气体量有可能足以使接收罐过压。控制方案是：在输送期间向接收罐充注时，要留有少量顶部空间以吸收压力波动。 在清管期间，如果清管装置后使用一个 气体驱逐器 ，就会遇到类似的情况。 [ ]查看更多
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