Keltech did a preliminary examination of the tanks to see physical
signs of condensation, frost, corrosion, algae as well as check paints
& coatings. Tests were also conducted to check the existing levels of
perlite.
Our experienced engineers were able to discuss with clients and
explain in detail the technical aspects and engineering requirements
of this specialist operation. Adequate rehearsals apart from safety
drills were held for all the operations.
Keltech had the equipment and the experience to inject fresh perlite
into the tank to fill up the voids to eliminate these cold spots.
Liquified gas storage tanks have to be topped up live using special
injection pots, and the transfer of perlite was effected utilizing
pressurized Nitrogen. This ensured that there is no addition of oxygen
to the atmosphere inside the intermediate space which normally has a
high content of flammable gases.
This operation was carried out under strictly controlled procedures
which have been developed and successfully followed on a variety of
LNG tanks following a precise and well tested procedure using
specially designed equipment and processes to ensure ZERO EMISSIONS.
By proper positioning of the top-up nozzles, it was possible to inject
the perlite under pressure, controlling the direction of the jet to
ensure that the space between each nozzle was refilled and the perlite
reinstated to the original and required level.
