Page 43: of Marine News Magazine (April 2015)

42 44

PROPULSION

Design Discussion Norwalk, Connecticut will be respon- President and Principal Naval Ar-

Many of the industry and regulato- sible for the Owner’s design review chitect of the Bristol Harbor Group, ry discussions surrounding the deliv- and construction supervision. Amtech has been immersed in the many com- ery of this new fuel source have been has deep experience in the LNG game, mittee meetings that led to the initial limited to multiple Type C tanks and and its Korean of? ce teams have com- barge design. He told MarineNews deck barge con? gurations. The West- pleted GTT membrane construction in March, “Bristol Harbor Group is pac Midstream LNG barge will, on the at Hyundai Heavy Industries and been honored to be working with Conrad other hand, feature one single mem- involved in full LNG commissioning Shipyard, LLC (Conrad), WesPac brane tank equipped with MARK III at other Korean shipyards. Midstream, Clean Marine Energy,

Flex cargo containment technology From the design side, Greg Beers, GTT North America, Amtech and *Continued on page 57 provided by France-based GTT. This technology has been successful in

LNG cargo ship construction in South

Korea delivering tank space and capac- ity upwards of 180,000 cubic meters.

The GTT Mark III Flex system features a cryogenic liner supported directly by the barge’s inner hull com- posed of a primary and secondary bar- rier. The primary membrane is made of corrugated stainless steel 304 L, 1.2 mm thick. The secondary membrane is made of a composite laminate ma- terial, with a thin sheet of aluminum between two layers of glass cloth and resin, sandwiched between insulation panels. With the tank is designed for a maximum design pressure of approxi- mately 10 PSIG, GTT’s membrane technology is Class certi? ed by all ma- jor regulatory agencies and has been in service since 1967, encompassing over 300 LNG ships to date. The mem- brane technology has and continues to be proven technology for the storage and transport of LNG internationally.

On the Job

Conrad Orange Shipyard will con- struct the 2,200 cubic meter barge under GTT license and with GTT personnel overseeing the membrane construction. But, the project also fea- tures a host of experienced talent, de- signed to ensure a successful outcome.

Bristol Harbor Group, Inc. of Bristol,

Rhode Island will be responsible for the vessel’s design, while Alternative

Marine Technologies (Amtech) of 43 www.marinelink.com MN