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Energía Costa Azul first LNG cargo, April 2008
Energía Costa Azul first LNG cargo, April 2008
Energía Costa Azul first LNG cargo, April 2008
Energía Costa Azul raises the roof on second
storage tank
On Friday, July 28, 2006, workers raised the roof atop
the second of the project’s two LNG storage tanks.
Roof-raising process
The process involved lifting the pre-assembled, 529-ton,
260-foot-diameter roof structure 128 feet on a cushion
of air at the rate of about one-half foot per minute. Giant
fans within the tank helped get the job done by raising
the pressure within the tank to about 0.18 pounds per square
inch.
Once the roof was at the top of the structure, it was welded
into place. When finished, each of the tanks will stand
175 feet tall and measure 260 feet in diameter. When filled
with liquid, each outer tank will hold more than 50 million
gallons.
The natural gas stored as LNG within the two tanks, about
6.7 billion cubic feet, could supply Mexico for one and
one-half days and California for more than a day. The roof
for the first tank was put in place in late June.
Safety standards
The full-containment gas storage tanks have been built
to meet the LNG industry’s most stringent safety
standards. The tanks’ walls are covered by 20 inches
of steel-reinforced concrete and thick blankets of insulation.
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