Liquefied Gas Carrier

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How to cool down cargo system in a liquefied gas carrier

Cargo systems are designed to withstand a certain service temperature; if this is below ambient temperature the system has to be cooled down to the temperature of the cargo before cargo transfer. For LNG and ethylene the stress and thermal shock caused by an over-rapid cooldown of the system could cause brittle fracture. Cooldown operations should be carried out carefully in accordance with instructions.





Below is our guideline for safe cargo operation on board gas carriers

Procedure for commissioning the cargo system

Preparation for Cargo Transfer

Procedure for discussion prior cargo transfer

Procedure for safe Cargo handling in Liquefied Gas Carriers

Procedure for loading Liquefied Gas Cargoes

Procedure for Cargo Conditioning in Liquefied Gas Carriers

Cargo Transfer between Vessels (STS Operation)

Procedure for segregation of Liquefied Gas Cargoes

Procedure for Stripping Liquefied Gas Cargoes

Procedure for Changing Liquefied Gas Cargoes

Displacing Atmosphere with Inert Gas (Inerting)

Displacing with Vapour of the Next Cargo (Purging)

Procedure for Water washing after Ammonia Cargoes





Related Information:

  1. Liquefied gas Cargo safe handling & responsibility on board


  2. Cargo emergency shutdown requirement for liquefied gas carrier

  3. Gas analyzing equipment


  4. Custody Transfer Measurement (CTM) System




External links :


  1. International maritime organization







Related Information:

  1. LNG tank leaks and immediate action by gas carriers


  2. Leaks from a Loading Arm due to Tidal or Current Effects

  3. Minor or major leaks from LNG tanks


  4. Risk of Overfilling of Cargo Tank during Loading


LNG spill risk during marine transportation and hazards associated

How to tackle fire on board LNG ship

Fire fighting plan for LNG cargo





Cargo conditioning, reliquefaction and boil-off control requirement for a liquefied gas carrier

Cargo Containment Systems in Liquefied Gas Carriers

cargo emergency shutdown requirement

damage stability guideline for liquefied gas carriers

Various Cargo handling equipments onboard

Cargo hoses connection guideline

Documents accompanying a liquid gas cargo

How LNG transferred from shore to ships cargo tanks ?

Cargo operation guideline onboard a liquefied gas carrier

Cargo piping Systems in Liquefied Gas Carriers

cargo planning requirement

cargo and pumproom safety precautions

cargo stripping guideline

Emergency response for cargo system leaks

Emergency response for cargo tank rupture

Risk of overfilling of cargo tank during loading onboard a liquefied gas carrier

Preparation for cargo transfer

cargo transfer between vessels- safety guideline





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