液化天然气密封系统的设计者GTT公司的Mark III Flex系统已经获得了必维国际检验集团原则上批准(AiP)，该系统是专为北极地区作业而设计和修改的。

这种膜式货物密封系统(CCS)是GTT Mark III Flex技术的改进。

Mark III技术是一种低温衬管，用于在常压情况下运输时、陆上和海上储存期间的低温条件下容纳液化气。

Mark III Flex货物密封系统提供的隔热解决方案可将每日保证蒸发气率降低到油箱容积的0.085%。

自2011年推出以来，Flex系统已经在66艘LNG运输船和1艘FSRU上服役。

改进后的系统在俄罗斯的Krilov技术工厂进行了广泛的测试，以证明Mark III Flex适用于在冰雪覆盖水域航行。在此之前，对首批15艘Yamal液化天然气运输船所使用的GTT NO96进行了类似测试，所有测试均由必维国际检验集团进行分类。

在俄罗斯研究所应GTT的要求进行了振动和加速度测试后，必维批准了该系统在北极地区的应用。振动/加速度计算是为了模拟船舶破冰作业时的系统行为。

裘寅 编译自 世界天气

原文如下：

Bureau Veritas approves GTT tech for Arctic LNG carriers

GTT, the LNG containment system designer has received approval in principle (AiP) from Bureau Veritas for its Mark III Flex system specifically designed and modified for Arctic operations.

This membrane cargo containment system (CCS) is an evolution of the GTT Mark III Flex technology.

Mark III technology is a cryogenic liner used to contain liquefied gas at low temperatures during shipping, onshore and offshore storage, at atmospheric pressure.

The insulation solution provided by the Mark III Flex Cargo Containment System reduces the daily guaranteed Boil-Off gas rate to 0.085 percent of tank volume.

The Flex system is already in service with 66 LNG carriers and 1 FSRU since its introduction in 2011.

The evolved system was tested extensively in a Krilov technology facility in Russia to demonstrate the suitability of Mark III Flex for use in navigation in ice infested waters. This follows similar testing for GTT’s NO96 used for the first 15 Yamal LNG carriers – all classed by Bureau Veritas.

BV approved the system for the Arctic application following the results of the vibration and acceleration tests performed by the Russian institute on the request of GTT. The vibration/acceleration calculations are made to simulate the behavior of the system when the ship is involved in ice breaking operations.