The FGSS comprises an LNG fuel tank, gas supply unit, control systems and other relevant equipment. The FGSS to which the AIP was granted this time was developed mainly to be installed on coastal ferries and small to mid-sized cargo ships, based on not only experience and knowledge obtained through shipbuilding of LNG carriers for many years but also technologies and know-how accumulated by development of FGSS products for large ships. The small size vacuum-insulated type tanks to be applied for the system have a double shell structure that ensures high heat insulation and also allows the external cylinder of the tank to be at normal temperature, which consequently simplifies the support structure of the tank and reduces the workload for the installation work. Further, the Tank Connection Space(3) is also designed to save space while giving consideration to realize easy operation and less maintenance.
Mitsubishi Shipbuilding delivered its FGSS in 2019 to be installed on
Mitsubishi Shipbuilding will keep expanding its product lineup to meet the increasing demand for LNG fuel and will continue not only providing FGSS as a manufacturer, but also offering superior engineering services for gas handling-related equipment in order to support the design and construction of LNG-fueled ships regardless of the size and vessel type, contribute to the further development of ocean transport, and reduce the environmental load.
(1) Approval in Principle (AIP) indicates that a certification body has reviewed the basic design, and confirmed that it meets the technical requirements and standards for safety. The inspection of this system was conducted based on the IGF Code(4) with which compliance is required when using LNG fuel, and BV's ship classification regulations.
(2) A marine four-stroke dual fuel engine is an engine fitted mainly in small and mid-sized ships, and is able to use both conventional heavy oil and natural gas as fuel.
(3) Tank Connection Space is a space surrounding all tank connections and tank valves. It is required under the IGF Code for tanks with such connections in enclosed spaces.
(4) The International Code of Safety for Ships Using Gases or
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