Minimising the risk of boil-over

It is extremely important that the driver always makes sure that the tank is free of water or aqueous products before loading bitumen.

When water comes into contact with hot bitumen, a powerful reaction occurs. This is because when water is heated to the temperature of the bitumen, it vaporises and expands. The risk of these kinds of accidents, known as boil-over, is particularly high if hot bitumen is loaded into a tanker that previously transported emulsion or another product with a high water content.

Other risk factors are if the tank has not been used for a long time, as condensation can easily form, or if it has been left standing open. In just a few seconds, 10 litres of water can expand to form 20,000 litres of steam. When the pressurised steam passes through the liquid bitumen, a hot foam is formed that is forced out through the manhole or, if the tank is closed, causes an explosion.

In other words, it is extremely important that the driver always makes sure that the tank is free of water or aqueous products before loading.


To raise the safety awareness regarding boil-over, Eurobitume has produced a practical manual in four steps. You can find it here.

Sustainable Development

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Nynas is investing SEK 190 million to secure the supply of bitumen for the Nordic infrastructure. At the same time, carbon dioxide emissions can be reduced by 34%.

Interview

The road to new mobility

An international benchmark study highlights the road industry’s role in the transformation of road infrastructure and the development of new mobility.

Noted

Stop and full speed ahead

On 27 November 2020, after 46 days and 8,000 activities with no accidents and not one single person being infected with COVID-19, a turnaround was completed at the Nynas refinery in Harburg.

Projects

Porsgrunn, Norway

The global Norwegian industrial group Yara International is the first in the world to use a totally electric container ship in commercial operation. To make the transition from land to sea transport, a new quay facility is being built.

Noted

All the key players are working together to achieve the best possible result.

Katri Eskola, Specialist Road Maintenance Finnish Transport Infrastructure Agency

Talking point: The COVID-19 pandemic


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