Liquefied Natural Gas Rollover – Definition and Pronunciation
What is Rollover?
Rollover is the results from a rapid release of LNG vapour from a tank, caused by stratification.
Examples of Rollover
In 1993, a rollover occurred in a 21 000 tonne storage tank at the Partington LNG peak-shaving plant in the UK, resulting in the relief valves lifting and a considerable quantity of vapour being discharged to atmosphere.
From “Prevention rollover in LNG Tanks”.
For LNG ships, while the circumstances leading to rollover are quite unusual, rollover has occurred, leading to the release of this information paper.
From “Maritime Standards Explained. A Focus on EN ISO 20519, ISO/TS 18683, and Supporting Guidelines”.
If the bunker barge/vessel LNG fuel cargo tank already contains older (aged) LNG there is the possibility for stratification. Probability for “rollover” with peak excessive BOG generation.
From “Balancing Cleaner Fuel and Environmental Impact in LNG Emissions”.
Pronunciation of Rollover
