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Displacing with Vapour of the Next Cargo (Purging) -Liquefied Gas carrier guideline

If the two cargoes are compatible, in terms of both chemical reaction and shippers’ requirements, vapour from the previous cargo may be replaced (purged) directly by vapour from the next cargo, from shipboard storage vessels or from shore.
If purging is carried out in port, local regulations may require the expelled vapours to be led ashore for safe disposal, either to a vent of flare stack or for use in the shore plant. In all cases advance notification should be given to the port authorities and permission obtained before starting the operation. Purging should be carried out in the most suitable way until acceptable conditions for the next cargo are reached.

Related Information:

  1. Procedure for commissioning the cargo system

  2. Cargo emergency shutdown requirement for liquefied gas carrier

  3. Gas analyzing equipment

  4. 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

Procedure for Water washing after Ammonia Cargoes

Preparation for Cargo Transfer

Procedure for discussion prior cargo transfer

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