GTT inside

GTT Inside, the GTT newsletter

GTT Inside #20 - March 2021


Message from David Colson, Commercial VP of GTT

David Colson, Commercial VP of GTTI am very pleased to be able to present the first edition of GTT Inside of 2021.
First of all, I would like to send the best wishes from all at GTT for the health and well-being of all our friends and business partners. We sincerely hope that the difficulties of 2020 can soon be put behind us and that we can resume some normalcy in the near future.

In this issue, we will be concentrating on some new membrane system developments as well as our continued efforts to improve operational reliability and safety of our systems. You will find out more about the latest version of the NO96 system; the SUPER+ and its improved boil-off performance of 0,085% of cargo tank volume per day. On the subject of LNG fuel tanks for commercial vessels, we introduce our latest evolutions of the Mark III system, involving both an Ammonia-ready notation as well as an increased operating pressure on 1barg. Both improve flexibility of the system for carrying future fuels as well as enabling increased gas holding time in operations.

Finally, we will introduce improvements on the inspection and the fixation of the Whessoe float-level gauge.


First Approval in principle (AIP) from class for NH3 ready and 1 barg design

The maritime sector faces new challenges with the evolution of environmental regulations towards carbon neutrality and the corresponding nascent supply chains. Ship-owners require more than ever a maximum flexibility over the lifespan of their next new-buildings.

GTT recently announced two innovations which will help ship-owners to future-proof their assets and investments. These innovations received the first Approvals in Principle (AiP) from Bureau Veritas, a world leader in testing, inspection and certification.



NO96 Super+

GTT membrane technologies continue to evolve based on significant feedback from operational experience, in order to meet the requirements of ship-owners and shipyards, while also complying with regulatory changes affecting the industry.

GTT has introduced several new technologies in order to minimise the evaporation of the cargo during operations. As highlighted on the below graph, since 2010, the guaranteed Boil-Off-Rate (BOR) achievable with GTT technologies has been significantly reduced from 0.15%V/day down to 0.07%V/day.



Increased safety of tank operations: adaptation of the float-gauge door

Pump towers are complex and key structures as far as operations of LNG cargo tanks are concerned. The main function of the pump tower is to load/unload the tanks. The tower is designed with a primary structure supporting the main pump wells and is reinforced by struts linking the primary structures together. The pump tower structure is so designed to withstand various combined loads such as thermal contraction, hydrodynamic forces, inertia, vibration, etc. Pump tower design also implements various fittings and instruments which are linked to the main primary structure. This equipment is essential for the good operations of the tank.