removal of old rubber lining of digestion vessel 02 in pa plant , fact- cd . , removal of old rubber lining of digestion vessel 02 in pa plant , fact- cd . , removal of old rubber lining of digestion vessel 02 in pa plant:- work involves: arrangements of scaffolding shall be done inside and outside the vessel . old rubber lining shall be removed from complete side wall / shell area , bottom plate , roof , nozzles , manholese , dummies etc inside and outside of the digestion vessel 02 . removal of silica / deposited matter / remains of brick lining etc on shell and side walls and bottom plate is also under the scope of this contract . rubber lining shall be chipped in such a way that the plates are not damaged by the chipping equipments . arrangements shall be made to cover up the launder if required using suitable sheet to facilitate the work . preparation of entire surface after rubber removal inside and outside shall be done by chipping , through cleaning by using wire brush , grinding and buffing . approx diameter of tank is 5 . 1 m and height 5 . 7 m , aprroximate area of rubber lining to be removed is 260 sq . m .