General Best Practices for reducing cargo Vapours
Cargo vapour should not be returned to the cargo tank post discharge operations
Liquid cargo should not be returned to the ships cargo tank post discharge in accordance with the MARPOL Annex II chapter 8, regulation 18.
Cleaning between compatible products should be avoided where ever possible.
Fixed tank cleaning machines should be outfitted to all chemical tanker new buildings, which should not let inert gas escape.
Closed sampling and gauging should be used and surveyors should utilise the equipment as fitted.
Where existing chemical tankers are outfitted with portable tank cleaning machines the vessel should employ such measures that will best reduce cargo vapour emissions such as the use of proper temporary seals around the portable machines,
The cargo system should, where possible, not be opened during tank cleaning operations.
During, board to board transfers which take place at a terminal, then where possible the ship generated vapours should be returned to the terminal vapour destruction unit.
Operators should endeavour to stow products which emit the most vapours in the least number of cargo tanks, in order to reduce cargo vapour emission.
Solvent cleaning should be minimised where ever possible.
Additives should not be added to the product via open tanks
Padding with nitrogen will act as a barrier in reducing cargo vapour emissions.
Agenda for the CTC #32Page 35 of 39
To be held in Panama City on the 09 April 2008 Issue No. 1
Our Ref.: AGO-22713/1000003Approved by: H.N. Snaith