Enhanced Integrity LNG Storage Tanks

In recent years close attention has been given to increasing the integrity of LNG storage tanks. The M.W. Kellogg Company is a participant in four major LNG projects that incorporate enhanced integrity LNG storage tanks. Enhanced integrity tanks provide more secure containment than the conventional, above-ground, double-wall steel tank. These projects, the Belgium and Hsing-Ta, Taiwan receiving terminals and the Das Island, and Burrup Penninsula, Australia liquefaction plants each utilize a different approach to the design of enhanced integrity storage.This paper discusses the pertinent features of the primary and secondary containment systems for these designs and compares them with a conventional above-ground, double wall system. Relative costs and design/construction schedules compared to the conventional, above-ground, double-wall steel tank are also reviewed.