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Korea: DSME installs high manganese steel LNG bunker fuel tank on ULCC

20 Jun 2022

Daewoo Shipbuilding & Marine Engineering (DSME) on Thursday (16 June), in a world’s first application, installed a high manganese steel liquefied natural gas (LNG) bunker fuel tank to an ultra-large crude oil carrier.

DSME and POSCO have jointly developed the tank manufacturing technology for 10 years, from pretreatment to welding to use high manganese steel to build an LNG fuel tank.

“And finally, after mass production and processability verification, it was mounted on a real ship this time, and we saw the fruits of 10 years of joint effort,” said DSME. 

“As a result, the two companies have established Korea’s own unique LNG fuel tank ecosystem centred on high manganese steel, thereby securing national competitiveness in fire management (materials, parts, and equipment).”

Until now, materials such as Invar (nickel alloy steel), aluminium, and stainless steel have been used for cargo holds and fuel tanks that can withstand the cryogenic temperature of -163°C. 

However, they had disadvantages such as high price, difficult work process, and low strength. 

“The onboard high manganese steel LNG fuel tank overcomes these shortcomings. The newly applied high manganese steel has a lower price than existing materials, and has high strength and wear resistance as well as performance at cryogenic temperatures,” said the firm. 

Daewoo Shipbuilding & Marine Engineering President Park Doo-sun, who attended the ceremony to install the bunker tank on the carrier, said: “Our company, which boasts the world’s most competitive edge as a renowned LNG carrier, has set another milestone. As it is a technology, we will lead to strengthening the competitiveness of the entire Korean shipbuilding industry.”

Choi Jong-gyo, Executive Vice President of POSCO Research Institute, said, “The successful mass-production of high-manganese steel, a unique Korean material, to global LNG-powered ships is overwhelming. I believe that it will play a big role in the future eco-friendly ship market.”

Related: MSC approves POSCO steel product for LNG fuel and storage tanks


Photo credit: Daewoo Shipbuilding & Marine Engineering
Published: 20 June, 2022

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