All issues
Volume 33 (1995)
- Issue 6 Pages 286-
- Issue 5 Pages 230-
- Issue 4 Pages 174-
- Issue 3 Pages 116-
- Issue 2 Pages 50-
- Issue 1 Pages 4-
Predecessor
Volume 33, Issue 6
Displaying 1-9 of 9 articles from this issue
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Hideo KOBAYASI1995 Volume 33 Issue 6 Pages 286-287
Published: November 25, 1995
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSDownload PDF (193K) -
Yukio IWATA, Youichi FUCHIMOTO, Kuniyoshi OKAMOTO, Nobuhiro MABUCHI1995 Volume 33 Issue 6 Pages 288-295
Published: November 25, 1995
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSThe second berth for LNG tankers has been constructed at Senboku LNG terminal II of Osaka Gas Co., Ltd. to meet its increasing demands of LNG reception. In the course of design and construction, much efforts have been made to reduce skill requirement, to save cost, and to realize safety.
Actually in our practice, an automatic unloading arms operation system was developed for skill free and safety operation. In the construction of marine pipe racks and working platform, prefab method was introduced transporting pre-assembled elements from the manufacturer's factory by sea for cost saving. In the land area, LNG unloading pipe line was laid in culvert for farther safety. This report presents the overview of the engineering records of the second berth.View full abstractDownload PDF (6131K) -
LNG in-pit Storage Tank ConstructionHiroyoshi OKAMOTO, Kozo TAMURA1995 Volume 33 Issue 6 Pages 296-305
Published: November 25, 1995
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSHiroshima Gas Co., Ltd. made a decision to introduce LNG as raw material for city gas and has already started construction of the LNG receiving terminal in Hatsukaichi city, Hiroshima Pref. The costruction of this LNG terminal is now smoothly under way with the cooperation and guidance provided by the Ministry of International Trade and Industry, Japan Gas Association, etc.
The LNG storage tank of this terminal is the first In-pit type storage tank in Japan, which is a type of “aboveground LNG storage tank” installed in a reinforced-concrete pit built in the ground. This tank has exellent combined characteristics of the aboveground storage tank and the inground storage tank as described below:
·The maximum liquid level is below the ground surface.
·Appropriate space which exists between the pit and the tank enables control of the cold heat transferred from the storage tank.
·The storage tank is in good harmony with its surroundings.
This paper describes the overview of this LNG terminal and construction of the 85, 000kl LNG In-pit Storage Tank.View full abstractDownload PDF (1028K) -
Atsushi Takagi, Shinichi Takagi1995 Volume 33 Issue 6 Pages 306-313
Published: November 25, 1995
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSTokyo Gas manufactures city gas derived mainly from LNG (Liquefied Natural Gas) and supplies it to the customers in the urban range of Tokyo metropolitan area of Japan
The first LNG inground storage tank (10, 000kl in capacity) was installed at the Negishi Terminal in 1970. Up to September 1995, Tokyo gas has constructed twenty-eight LNG tanks of the fifty-five LNG inground storage tanks in operation throughout Japan. Presently, Tokyo Gas has three LNG tanks under construction at the Negishi and Ohgishima Terminal. Many advances have been made in improving safty, reliability, and cost reduction. This has resulted from intensive R&D efforts and careful analysis of field data.
Here is described the construction of the world largest LNG inground storage tank (200, 000kl in capacity) and the latest technology employed in this project. Many latest technology has been experimented and devdloped through the construction of new inground storage tank. The tank of subject is now under construction in the Tokyo Gas's Negishi Terminal.View full abstractDownload PDF (7557K) -
Tomomi GOTO, Masayuki OCHI1995 Volume 33 Issue 6 Pages 314-321
Published: November 25, 1995
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSImproved construction techniques are necessary to reduce the cost and construction time, and to improve the working environment when constructing larger in-ground storage tanks.
This report covers the welding system we have been investigating to automate welding and inspection works for the tank membrane, which take some 50% of the overall membrane construction period. The system uses a vision sensor and welding head which can function in all welding positions. In the near future, a working process which enable to operate with very few workers will be established.View full abstractDownload PDF (4361K) -
Shoichiro KAIHARA, Kazuhisa IMAMURA1995 Volume 33 Issue 6 Pages 322-331
Published: November 25, 1995
Released on J-STAGE: August 05, 2010
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Kazuo KOYAMA, Nobuhiko TSUI, Masahiro ARAKAWA, Kazushige YAMAMOTO, Tos ...1995 Volume 33 Issue 6 Pages 332-339
Published: November 25, 1995
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSIn order to steadily supply gas at a fair price over an extended period of time, it is necessary for gas companies to assemble optimal production and supply facilities which are able to handle an increase in demand with an adequate level of reliability. To address the need, Tokyo Gas Co., Ltd. and Mitsubishi Heavy Industries, Ltd. have jointly developed a system capable of quantitative evaluation of reliability based on the “Fault Tree Analysis Method (FTA)”, and have assembled it into a system using an engineering work station. The features of the system are the function for the constructing fault trees automatically based on input diagrams which are similar to P & ID, one line diagram, and so forth, the function for drawing input diagrams graphically and the functin for the calculating reliability indices. This paper gives a summary of the approach used in the constructing fault trees, the method for calculating the reliability indices and an example of the reliability analysis of the LNG terminal.View full abstractDownload PDF (781K) -
Masakazu UMEMURA, Takashi FUJII, Mikio KIYOTA1995 Volume 33 Issue 6 Pages 340-348
Published: November 25, 1995
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSProviding economical gas and improving reliability are never-ending themes for gas companies. In order to offer customers consistently stable supply gas, it is necessary to improve the reliability of terminals. Yet, if the facilities and equipment of LNG terminals were made redundant and the reliability of each device were to undergo continual improvement, the cost of producing gas would become exorbitant.
LNG terminals are gas production plants where LNG delivered by special tankers is stored at extremely low temperatures (-160°C). Here, vaporizer turn the LNG into a gas that is supplied as town gas or as fuel for generating power, which means that the reliability of LNG terminals greatly affects the stable supply of power as well as that of town gas.
In order to ensure the stable supply of both town gas and power, Osaka Gas has made every effort to implement policies aimed at improving the reliability of LNG terminals. To achieve this goal economically, requires quantitative evaluations of the reliability of LNG terminals and associated equipment.
This paper will explain the reliability index adopted to quantitatively express degree of reliability, outline the method of evaluating reliability to calculate that index, and offer examples of managing LNG terminals based on the reliability index.View full abstractDownload PDF (896K) -
1995 Volume 33 Issue 6 Pages 349-361
Published: November 25, 1995
Released on J-STAGE: August 05, 2010
JOURNAL FREE ACCESSDownload PDF (1626K)
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