procurement of aluminium corrugated and gi sheet for upcomming o h of unit-1, stage- 1 ( 2x300 mw ) procurement of aluminium corrugated and gi sheet for upcomming o / h of unit-1, stage- 1 ( 2x300 mw ) , procurement of aluminium corrugated and gi sheet for upcomming o / h of unit-1, stage- 1 ( 2*300 mw ) . , alumunium corrugated sheet for insulation aluminium corrugated sheet for insulation , size: 3000mm longx875mm widthx0.759mm thick, i.e gauge 22 ( make tata / jindal / sail / rinl. ) , sheet, gi, thickness 28 gauge for boiler sgtpp width-1220mm ( make tata / jindal / sail / rinl and is 277. )