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LNG Cargo Discharging procedure

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  • LNG Cargo Discharging procedure

    I will be joining LNG ship as an officer in few days. someone please tell the Onboard Procedures for discharging LNG cargo? Thanks in Advance.

  • #2
    Hi bikram : Liquid is pumped ashore by use of two submerged pumps installed at the bottom of each tank. In the process, the cargo tank pressure shows a decreasing tendency as the LNG level drops in the tank, resulting from the discharge of LNG. Conversely, shore tank pressure shows an increasing tendency with the receipt of LNG.

    By use of the pressure difference between shore and vessel cargo tanks, LNG gas in the shore tank is sent to the vessel cargo tank. However, when LNG is discharged at a higher rate, the vessel cargo tank shows a declining tendency and, therefore, LNG gas is forced into the vessel cargo tank with a shore blower, to maintain the vessel tank pressure. As another way, part of the LNG to be discharged is vaporized with a vaporizer of the vessel and the BOG is delivered to cargo tanks.

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    • #3
      You have to take more tests regarding that for joining ..MAinly they will take all medical tests and drug reports for verification and ask you to sail in local first..

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      • #4
        Originally posted by deepak View Post
        Hi bikram : Liquid is pumped ashore by use of two submerged pumps installed at the bottom of each tank. In the process, the cargo tank pressure shows a decreasing tendency as the LNG level drops in the tank, resulting from the discharge of LNG. Conversely, shore tank pressure shows an increasing tendency with the receipt of LNG.

        By use of the pressure difference between shore and vessel cargo tanks, LNG gas in the shore tank is sent to the vessel cargo tank. However, when LNG is discharged at a higher rate, the vessel cargo tank shows a declining tendency and, therefore, LNG gas is forced into the vessel cargo tank with a shore blower, to maintain the vessel tank pressure. As another way, part of the LNG to be discharged is vaporized with a vaporizer of the vessel and the BOG is delivered to cargo tanks.
        As he told it can be done by using the pressure difference between shore and vessel cargo tanks..

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