The tank insulation is basically consists of PUF panels, which are fixed
by studs at the center on the tank. Between panels so-called cushion
joints are provided. This soft cushion absorbs relative movements
between tank and insulation and eliminate thermal stresses in the
insulation.
Being different from membrane system the insulation need not bear liquid
pressure and material can be chosen so as to achieve the best insulating
efficiency.
The best chosen ideal insulation material plus the efficient insulating
tank supports enables very low boil off insulation system. |