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New requirements to Inert Gas Systems

DNV GL technical update In 2004 in-tank explosions resulted in the total loss of two chemical tankers. The requirements for inerting of cargo tanks did not apply to these vessels. In recent years there have been a significant number of similar explosions and fires on board tankers. The majority of these explosions appear to take place in connection with tank washing and gas-freeing operations.As a consequence of the accidents in 2004, the inert gas requirements for oil and chemical tankers have now been amended.DNV GL has issued Technical Newsletter to inform about these new requirements■ The amendments apply to oil and chemical tankers constructed on or after 1st January 2016.■ The amendments do not have retro-active effect for existing tankers constructed before 1st January 2016.■ The amendments have been included in SOLAS Ch.II-2, the IBC code and the FSS code Ch.15.The amendments will have the following effect:1. General for all tankersThe deadweight limit for inert gas requirements has been lowered from 20 000 tonnes deadweight to 8000 tonnes deadweight. Therefore, all oil and chemical tankers of 8000 dwt and above must be provided with a fixed inert gas system. The requirements also apply to gas carriers carrying flammable oils as ...

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