GST® membrane LNG storage tanks

The storage of liquefied natural gas makes it possible to ensure an uninterrupted supply and to respond to peaks in energy consumption.

 GTT has developed GST^® technology, based on Mark III technology, which has proven its reliability and robustness over 60 years of existence. It is a safe and adaptable solution, whatever the tank capacity. It complies fully with international standards and meets the highest safety standards.

Tried and tested for over 30 years, more than 25 onshore tanks are currently in operation.

Separation of the main functions

The GST^® concept is based on a clear separation of the 3 main functions required from a land storage tank; tightness, thermal insulation and structural resistance.

Prefabricated modular elements

The GST^® technology consists of a combination of a limited number of modular basic shaped components that can be manufactured by normal industrial processes.
The elements composing the membrane sheet layer as well as the insulating panels (typically 1m x 3m) are prefabricated and fitted together on site.

GST^® technology

Primary Barrier

Insulating panel

The thickness of the panels can be adjusted to provide a large range of boil-off rates according to the operator’s requirements (typically 0.05% per day).
The outer concrete container provides the structural resistance to internal and external loads. A moisture barrier, applied on its inner side, prevents moisture from entering the tank.

Thermal Protection System (TPS) 

bottom up to 5m: a composite laminated material.
This consists of a thin sheet of aluminium between two layers of glass cloth and resin. In the event of a failure of the primary membrane, it prevents the build-up of stress concentrations on the concrete corner and ensures the liquid tightness of the concrete wall, as required by European standards.