procurement of fibre blanket and lrb mattress for upcoming u4 overhauling at sgtpp , procurement of fibre blanket & lrb mattress for upcoming u4 overhauling at sgtpp , lrb mattress density:100 kg / cu.mtr. confirming to is:8183, size-1220x1640x50mm, one side gi hex.wire netting of 24 swgx3 / 4†mesh for fd fan ( model-ap1 20 / 12 ) suction s ilencer / acoustic baffles of bktps u#1, 2&3. , mattress, lrb, 1220x1640x50mm, w / gi net for boiler & duct is:8183, density- 160 kg / m3, one side gi hex wire netting of 24 swg x 3 / 4 inch mesh , ceramic fibre blanket from long spun fibres.these can withstand continuous exposure up to 1260c, the size of material shall be 7300 mm x610 mm x25 mm, min density 128kg / m3 without binder, confirming to is code 15402