LNG Water Vapour Explosion - Estimate of Yields and Pressures (eBook)

Published Date

January 1978

LNG Water Vapour Explosion - Estimate of Yields and Pressures (eBook)

(Excludes any applicable taxes)

This paper reassesses the possibility of LNG/water vapour explosions and provides new estimates of maximum explosion pressures and yields based on non-marine industry research. (18pp)

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Vapour explosions are entirely physical events in which the contact of one liquid with another colder liquid leads to the extremely rapid vaporisation of the colder liquid, with the consequent generation of explosive pressures and the violent dispersal of at least one of the liquids. The possibility of vapour explosions between LNG and water was first recognised after the US Bureau of Mines1 reported the occurrence of three accidental vapour explosions during experiments to investigate the combustion hazards associated with the transport of LNG by sea and inland waterway.

Several research programmes were initiated to investigate the vapour explosion hazard presented by the contact of LNG and other liquefied hydrocarbons with water. These studies produced much experimental data and promoted the so-called superheat limit theory which could be used to interpret the experimental data with a high degree of success. The theory is important since it allows the prediction of both the conditions for the occurrence of vapour explosions and the associated pressures and yields. Vapour explosions also occur for a wide range of systems other than LNG and water. For example, they regularly occur in the foundry industry, especially during aluminium casting if molten metal falls into water. In addition, vapour explosions have been reported in the nuclear industry, in these instances the uranium/ aluminium fuel in early experimental reactors became molten during accident conditions and contacted the water coolant. A useful summary of these incidents and others in the chemical process and paper industries is provided.

Our wide experience of the studies suggests to us that the superheat limit theory is only applicable to a limited range of circumstances and that the explosion pressures and yields may exceed the predictions of the superheat limit theory. Therefore, in this paper. we reassess the possibility of LNG/water vapour explosions and provide new estimates of maximum explosion pressures and yields.

Paper Delivered by:
GJ Vaughan
F Briscoe (United Kingdom Atomic Energy Authority)

Prepared for:
Gastech Monaco 1978

For over 45 years, the Gastech Exhibition & Conference has been at the forefront of the international gas and LNG market. This world-renowned event is regarded as the most significant meeting place for gas and LNG professionals, where the global industry gathers to do business.

Gastech hosts major IOCs, NOC’s, global utility companies, EPC contractors, shipbuilders, pipeline companies, manufacturers, distributors, technology and service providers, all who play an active role in the global energy value chain.

Title: LNG Water Vapour Explosion - Estimate of Yields and Pressures (eBook)
Product Code: 4433g052
Published Date: January 1978

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