The Safety of Gas Carriers with particular reference to the ICS Tanker Safety Guide (Liquefied Gas). Movement Control and PT (eBook)

Published Date

January 1975

The Safety of Gas Carriers with particular reference to the ICS Tanker Safety Guide (Liquefied Gas). Movement Control and PT (eBook)

(Excludes any applicable taxes)

This paper discusses the dangers of assuming the 'in-built' safety of LNG carriers is all that is required, outlining the shipowner's views on safety. (20pp)

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The marine transport of liquefied gases in bulk began in the decade immediately prior to World War II with the construction of a small number of purpose-built vessels, and some tanker conversions, to carry LPG cargoes. In the 1960s with the development of low temperature steels, cargoes could be carried at temperatures corresponding to atmospheric pressure in insulated tanks. This development ran parallel to the introduction to marine transportation of liquefied gases, mainly by-products of the petrochemical industry which included anhydrous ammonia, butadiene etc. This demanded that the ships become more flexible in the range of cargoes carried.

Generally the current practice is for smaller ships to have pressurised semi-refrigerated capability with the larger ships taking the advantage of lower cargo tank weight and cost by using the fully refrigerated philosophy. This made good economic sense as lower pressures meant low steel weights and, consequently, lower initial costs. Ethylene and liquefied natural gas (LNG) were introduced to the types of cargoes carried in the early 1960s and brought with them the need to transport at cargo temperatures of –104°C and –160°C respectively.

To the average seafarer the transport of liquefied gas is outside his experience and is an unnatural cargo. The thought and care that has gone into the development of LPG/LNG ships has meant that safety has been largely 'in-built'.

This paper will discuss the dangers of assuming this to be all that is required and outline the shipowners' views on safety. It is clear that on a numerical basis the fleet of vessels below 5 000 cu m is by far the predominant class (76.4%). The rapid growth both in numbers and size indicates a need for increasing attention to safety.

Paper Delivered by:
JMS Smith (ICS, London)
RC Mathew (ISF, London)
JAF Crook (Swan Hunter, Hebburn)

Prepared for:
Gastech Paris 1975

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: The Safety of Gas Carriers with particular reference to the ICS Tanker Safety Guide (Liquefied Gas). Movement Control and PT (eBook)
Product Code: 4433g042
Published Date: January 1975

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