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Moss-type LNG

Malaysia’s Petroliam Nasional Bhd (Petronas) has selected ABS to class its two new Moss-type LNG carriers, which are to be built in Korea.

The 150,200m³ capacity ships will be built at Hyundai Heavy Industry’s shipyard in Ulsan, Korea, and will feature modern technology for improved energy efficiency and operational reliability.

ABS Global Gas Solutions vice-president Patrick Janssens said: “This contract is a recognition of ABS’ technical knowledge and leadership in the gas carrier sector.”

“Not only do we have the largest order book for LNG carriers among class societies, all of the current LNG cargo-containment systems (Moss, GTT’s Mark III and No. 96 membrane types, and SPB types) have been installed on ABS-classed ships. And we continue to offer approval in principle to the new containment concepts proposed by industry designers.”

The Moss-type cargo tanks will measure about 42m in diameter and are expected to be used to operate as shuttles to and from floating LNG (FLNG) or other offshore facilities.

Featuring full-length tank covers integrated into the main hulls, the Petronas ships will be powered by new ultra-steam turbine propulsion systems to boost performance, reliability and ease-of-maintenance.

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The ships’ integrated structure will not only improve longitudinal strength and minimise structural discontinuity, but also allow for piping and passageways to be arranged on the tank-cover deck, improving safety and ease of maintenance.

ABS had recently formed a new Global Gas Solutions team, which includes a multi-disciplinary group of technical experts to address gas-related projects, including LNG and LPG transportation, the use of LNG and LPG as fuel and the growing number of FLNG projects.

Image: A Moss-type LNG carrier built by Hyundai Heavy Industries. Photo: courtesy of Hyundai Heavy Industries Co., Ltd.