French technology group GTT has introduced a new cubic-shaped LNG fuel tank design for commercial vessels, with particular focus on container ships, after receiving Approval in Principle (AiP) from classification society Bureau Veritas (BV).

The GTT CUBIQ design is said to eliminate the upper and lower chamfers traditionally used in LNG fuel tanks. GTT asserts that this cubic geometry offers simplified construction and enhanced volumetric efficiency compared to existing technologies.

The design is claimed to provide significant operational benefits for shipowners and shipyards:

1. Simplified and faster construction: GTT notes that the standardised cubic geometry, featuring fewer corner areas, can reduce construction schedules by several weeks while easing installation processes.

2. Optimised cargo capacity and profitability: GTT says the design optimizes cargo capacity by freeing up space, thereby maximising the number of containers that can be carried on vessels. With capacity of up to 14,000 cbm, the system is positioned for long-distance container routes.

The fuel tank features pressure build-up capability of up to 1 bar gauge (meaning 1 bar above atmospheric pressure), which GTT says has been approved by classification societies and ensures compliance with forthcoming cold ironing regulations.

"GTT CUBIQ illustrates GTT's ability to turn technical innovation into strategic value for the maritime industry," said Philippe Berterottière, chairman and CEO of GTT. "By combining efficiency, simplicity and cost-effectiveness, this concept reinforces our role as a long-term partner for ship-owners and shipyards, supporting them in building more competitive and future-proof vessels."

Matthieu de Tugny, executive vice president for industrials and commodities at Bureau Veritas, commented: "By approving this innovative LNG fuel tank concept, Bureau Veritas is supporting a simpler and more cost-effective approach to fuel storage for the shipping industry. This AiP reflects our commitment to enabling innovation while ensuring the highest levels of safety and compliance."

GTT specialises in cryogenic membrane containment systems for transporting and storing liquefied gases. The company has been involved in designing technologies for LNG carriers, floating terminals, onshore storage tanks and multi-gas carriers over six decades.