procurement of square tiles and round tiles for ahp of unit no 1 to 4 4x210 mw at sgtps mppgcl birsinghpur , square tiles as per drawing and following specification- i ) size - 12”x12”x1” ii ) material-blue fused alumina ( al2o3 content 82% ) iii ) type- porous tiles champers cut iv ) tolerance: - + / - 5mm v ) bulk density-2.3 gm / cc max. vi ) porosity -30% to 40% vii ) max. used temp - 9000c viii ) m.. r.o. – dry 150 kg / cm2 ix ) m.. r.o.-wet 120kg / cm2 make – grindwell norton / carborundum / equivalent , round tiles for ahp as per drawing and following specification- i ) size- 12” dia, thickness-1” ii ) material - blue fused alumina ( al2o3 content 82% ) iii ) type - porous tiles champers cut iv ) tolerance:- + / - 5mm v ) bulk density-2.3 gm / cc max. vi ) porosity- 30% to 40% vii ) max. used temp -9000c viii ) m..r.o. – dry 150 kg / cm2 ix ) m..r.o. – wet 120kg / cm2 make – grindwell norton / carborundum / equivalent