reconditioning of primary air coal bend (type i) 10 nos. reconditioning of primary air coal bend (type i) 10 nos. , reconditioning of primary air coal bend (type-i) : removing the eroded ceramic tiles completely and cleaning of the coal bend inner side, cutting of the pipe passing through the primary air coal bend which is carrying the fuel oil gun assembly, providing new pipe (material: carbon steel) fit up, welding of new pipe along with the flange and renewal of one part of metre bend with new ms plate after bending and welding in eroded area if required, fixing the ceramic tiles of 20mm thick with 10mm thick mortar (al2o3- 85% min, hardness- 8 to 9 mho scale, bulk density- 3.2 to 3.3 gm/cu.cm, water absorption-less than 1%) inside the coal bend and also around the pipe carrying the fuel oil guns assembly including cost of pipe and transportation.