Composite concrete cryogenic tanks

Composite cryogenic tank 
 Photo: Ben C. Gerwick / COWI.
A cryogenic tank being contructed. The smaller image at the top of this page is an aerial view of same.
Large LNG storage tanks are needed for both LNG export and import facilities in many locations in the world.

More and more installations require full-containment tanks that include a primary containment tank and a concrete secondary containment tank that includes a full-vapor barrier.

For full-containment tanks, most LNG tank providers are providing tanks that include either a nine per cent Ni steel shell primary tank with a concrete secondary tank, or a concrete secondary tank with a membrane containment/insulation system within the concrete secondary tank.

Cost and availability of steel

It is frequently the case that both the costs and schedules of current concept LNG storage tanks are significantly influenced by the cost and schedule for availability of the large quantities of nine per cent Ni steel used in these tanks.

This project is focused on the development of a full-containment LNG storage tank system that uses a composite concrete primary containment tank and a sliding base secondary concrete containment tank.

Two phases

The initial phase of this effort, Phase 1A, verified the potential for cost and schedule savings based on the review of an actual preliminary design of a concept that uses substantially less nine per cent Ni steel than current concepts.

Phase 1B involved a review of the Phase 1A baseline C3T concept in the context of a literature review, a more detailed preliminary design effort, and the development of a comprehensive basis of design.

LAST UPDATED: 18.09.2017