Fairbanks Natural Gas LNG Storage Tank

Preload Cryogenics, LLC completed the design and construction of a 20,000-m³ (5.25 million gallons) full containment LNG storage tank consisting of a precast, prestressed concrete secondary containment wall (35.2 meters in diameter by 27.1 meters tall), a 9% nickel primary containment wall (33.3 meters in diameter by 23.5 meters tall), 9% Ni primary and secondary floor plates, and an ASTM A5l 6 carbon steel dome with an aluminum suspended ceiling.

PROJECT HIGHLIGHTS

• On-site work included excavation and replacement of approximately 30,000 yd³ of unsuitable subgrade to reach stable till, the installation of an active (and passive) subgrade cooling systems to maintain the in-situ permafrost conditions and construction of an at-grade concrete base slab (with foundation heating elements).
• Precasting of the secondary wall panels was performed off-site concurrently with subgrade improvement operations and foundation construction work. The wall panels were transported to the site, erected and braced over nine (9) days.
• Fabrication of the carbon steel dome and the suspended ceiling was accomplished simultaneously with the outer wall construction and erected before winter conditions (in October) to "dry-in" the inner tank work.