biennial rate contract for procurement of pourable insulation, castable refractories why theate grade a, fire crete p and plastic / castable refractory / high temperature cement ( htc ) for unit no. 1 to 4 of sstpp, mppgcl, dongalia. biennial rate contract for procurement of pourable insulation, castable refractories why theate grade a, fire crete p and plastic / castable refractory / high temperature cement ( htc ) for unit no. 1 to 4 of sstpp, mppgcl, dongalia. , pourable insulation:- specification: servicetemp- 6500c, permanent linear change at 6500c=+ / -2.0%, compressive strength – in kg / cm2 [ at 1100c -22 min., at 5000c-14 min. ] bulk density at 1100c ( kg / m3 ) =660 max. bulk density at 5000c ( kg / m3 ) =640 max. thermal conductivity ( k ) [ at mean temp:2500 c in kcal / m hr 0c= 0.16 ( max. ) 5000c in kcal / m hr 0c ] chemical composition : fe 203 ( ferite oxide ) : 5.0 ( max ) , castable refractories why theate grade ‘a’ , castable refractories fire crete ‘p’ , plastic refratory ( 90.0% alumina ) with liquid binder: [ service temperature -16500c max. refractoriness-17850c, bulk density ( sample dried at 1100c for 24 hrs. ) cold crushing strength [ at 1100c / 24hrs. -650.0 kg / cm2, at 13000c / 5 hrs.-875.0 kg / cm2 ] permanent linear change [ at 1300 0c / 5 hrs. 0.60% max. ] chemical analysis [ ai203 ( nominal ) -90.0% fe203 ( max ) -0.3% ] abrasion loss pre-fired [ at 1100c / 24hrs. -5.0 cc, at 13000c / 5hrs. -3.5 cc ] , binder requirement -9.5 to 10.0% of wt, thermal conductivity [ at 10000c-2.0 to 2.2 kcal / m / hr / 0c ] , method of application- ramming / hand , plastic refractory ( as per sl.no 5 of tender schedule ) type90% al2o3 plastic refractory nature of bond : chemical installaionramming general properaties % raw material basetabular alumina max service temperature1650 °c maximum grain size5mm gemical analysis, % specification al2o3 90.00 min sio2 - fe2o3 0.5 max physical propertiesspecification dry density, g / cc after drying at 110°c / 24 hrs 2.7 min ccs, kg / cm² after drying at 110°c / 24 hrs 650 min after heating at 800°c / 3hrs - after heating at 1100°c / 3hrs - after heating at 1300°c / 3hrs 875 min thermal propertiesspecification refractoriness, °c+1785 plc. % after heating at 800°c / 3hrs - after heating 1100°c / 3hrs - after heating 1300°c / 3hrs + 0.60 max abrasion loss, cc ( max ) - , castable refractory ( whytheat c patch ) , heat treatment cement ( htc cement ) is-7509 values type-950 typical value hysil h-1000 ( as per sl.no 7 of tender schedule )