6.1.1 Regulation 55(a)(i) of Part E, chapter II-2, 1974 SOLAS Conventionfootnote as amended by the 1978 Protocol implies, inter
alia, that regulations 60 and 62 do
not apply to tankers carrying petroleum products having a flashpoint
exceeding 60°C; in other words, product carriers may carry bitumens,
lubricating oils, heavy fuel oils, high flashpoint jet fuels and some
diesel fuels, gas oils and special boiling point liquids without inert
gas systems having to be fitted, or, if fitted, without tanks containing
such cargoes having to be kept in the inert condition.
6.1.2 If cargoes with a flashpoint exceeding 60°C,
whether heated or otherwise, are carried at temperatures near to or
above their flashpoint (some bitumen cutbacks and fuel oils), a flammable
atmosphere can occur (regulation 62.1 refers).
When cargoes with a flashpoint exceeding 60°C are carried at a
temperature higher than 5°C below their flashpoint they should
be carried in an inerted condition.
6.1.3 When a non-volatile cargo is carried in
a tank that has not been previously gas-freed, then that tank shall
be maintained in an inert condition.