Design and Actual Service of Cargo Handling Equipment on an LNG Carrier(eBook)

Published Date

January 1985

Design and Actual Service of Cargo Handling Equipment on an LNG Carrier(eBook)

(Excludes any applicable taxes)

This paper provides details of the cargo handling equipment on 3 LNG carriers, including an analysis of their performance (17pp)

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Mitsubishi Heavy Industries Ltd. completed delivery of Echigo Maru, Banshu Maru and Dewa Maru, 125 000 m3 MRV type LNG carriers for the Indonesian Expansion Projects in August 1983, October 1983 and July 1984 respectively, and these carriers are now in satisfactory service.

In designing the cargo handling equipment of these three LNG carriers, we conducted a great deal of research and development and scrupulous examination in advance, and verification such as technical investigation onboard LNG carriers in actual service, which eventually proved the adequacy of our designs. These carriers are enjoying a good reputation among the owners and users for their excellent performance after being commissioned into actual service. We have collected comprehensive actual data since their deliveryto allow improvement for future LNG carriers, through the co-operation of their owners, by means of onboard investigations by our engineers, automatic measurements by tools that we fitted provisionally as well as measured data supplied by the ship's crew. In this paper we make a comprehensive study of relevant theory and the actual performance on the basis of these data and describe high accuracy estimating methods and effective operational procedures of cargo handling equipment, namely:
(1) Calculation procedure of the actual BOR (Boil Off Rate) and a quality control method of tank insulation at low temperature by testing at normal temperature.
(2) Economical LNG spraying procedure in a ballast voyage and a BOR controlling method by adjustment of the tank pressure in a laden voyage as well as in a ballast voyage.
(3) Changes in the LNG composition and in the BOR during transportation.
(4) Estimation of phenomena in various gas operations such as lank cooling down and inert gas purging, etc. and related operational know-how.

Paper Delivered by:
N. Itoyama
S. Fukushima
S. Hata
Y. Kobayashi
K. Kawabata
(all from Mitsubishi Heavy Industries Ltd, Japan)

Prepared for:
Gastech Nice 1985

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: Design and Actual Service of Cargo Handling Equipment on an LNG Carrier(eBook)
Product Code: 4433g009
Published Date: January 1985

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