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Cargo transfer between vessels (STS Operation) - liquefied gas carrier operation
If cargo is to be transferred from one ship to another, or to a barge, the precautions above should be observed. In addition, the relevant precautions in the ICS/OCIFM publication “Ship to Ship Transfer Guide (Liquefied Gases)” should be closely observed.
Before starting transfer operations the two masters involves should agree on every aspect of the transfer procedure and appoint a person in overall charge. Transfer operations between gas carriers should be carried out in accordance with the requirements of the receiving vessel.
In all cases, however, each master remains fully responsible for the safety of his own ship, its crew and cargo, and must not permit safety to be prejudiced by the actions of the other master concerned.
Transfer operations should only be carried out in favourable weather conditions and should not begin until the master or responsible officer of each vessel is satisfied that the situation is safe. A safety checklist should be used prior to commencing operations and, in the event of subsequent stoppages, a further check should be made before resuming operations.
During operations the maximum transfer rate must be consistent with the receiving vessel’s reliquefaction capacity. Alternatively, a vapour return hose connection should be made to the discharging vessel.
In the case of ship to barge transfers the following additional precaution should be taken:
(1) Before transfer begins the person in overall charge should be satisfied that the barge personnel are fully conversant with the nature of the hazards presented by the cargo being transferred and with the necessary safety precautions;
(2) Moorings should be of such a nature that the barge can be quickly released in an emergency;
(3) The rate of transfer should be controlled according to the nature and size of the barge;
(4) Operations should be stopped immediately if the barge fails to comply with the safety requirements in any respect;
(5) The barge should be requested to move from alongside as soon as possible after completion of loading or discharge.
Preparatory operations for drydocking
- Liquefied gases - How to remove all cargo liquid from tanks
- Connection and disconnection of cargo hoses and hard arms
- Discussion prior to cargo transfer in liquefied gas carrier
- Safety checklist for gas carrier
Type of gas carriers - variation in the design, construction and operation
Cargo Information - physical and chemical properties necessary for the safe containment of the cargo
Reactivity of liquefied gas 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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