procurement of pourable insulation, castable refractories why theate grade a and fire crete p grade c and plastic refractory for boiler pressure parts at 2x600mw at unit no. 1 and 2 of sstpp, mppgcl, dongalia , pourable insulation :- specification: service temp.- 650°c, permanent linear change at 650 °c= +/- 2.0% , compressive strength- in kg/cm2 [ at 110 °c- 22 min., at 500 °c- 14 min.], bulk densityat 110 °c (kg/m3)= 660 max.,bulk densityat 500 °c (kg/m3)= 640 max., thermal conductivity (k) [ at mean temp.-: 250 °c in kcal/m hr°c= 0.16 (max.), 500 °c in kcal/m hr°c], chemical composition : fe2o3 (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 - 1650 °c max., refractoriness- 1785 °c, bulk density (sample dried at 110 °c for 24 hrs.), cold crushing strength [at 110 °c/24 hrs. - 650.0 kg/cm2, at 1300°c/5 hrs.-875.0 kg/cm2], permanent linear change [ at 1300 °c/5 hrs.-0.60 % max.], chemical analysis [al2o3 (nominal)- 90.0%, fe2o3(max)- 0.3%], abrasion loss pre-fired [ at 110 °c/24 hrs.- 5.0 cc, at 1300 °c/5 hrs.- 3.5 cc], binder requirement - 9.5 to 10.0% of wt, thermal conductivity[ at 1000 °c - 2.0 to 2.2 kcal/m/hr/°c], method of application- ramming/hand