Gas Natural, S.A. LNG Storage Tank

 PROJECT HIGHLIGHTS 

• Two tanks were constructed with precast concrete panels with a carbon steel wall barrier, each 98’ 6” in height, which were prestressed vertically and circumferentially putting the walls in compression and helped significantly reduce stresses during service. 
• After construction, the tanks underwent rigorous hydrostatic and pneumatic testing before they were purged with dry nitrogen, then cooled down with LNG. The tanks achieved a total heat influx limit of an impressive 300,000 BTU per hour thanks to insulation that was installed in the annular spaces between the walls and 4” concrete dome roofs. 
• At the time of completion, the combined 80,000 m³ (503,200 Bbl / 21 MG) capacity was the largest double-wall prestressed concrete LNG tank system in the world. 
• In natural gas storage, capacity is key. This Preload project tested the limits of LNG storage capacity and delivered positive results for Gas Natural, S.A.