bids are invited for custom bid for services - 1 erection of scaffolding to access pipeline and valve support structures quantity 1 lumpsum means 250 sqm , custom bid for services - 2a rust removal from structures using buffing wheel cleaning with cloth including supply of buffing wheels quantity 1 lumpsum means 35 sqm , custom bid for services - 2b strengthening pipeline and valve support structures quantity 1 lumpsum means 2 mt , custom bid for services - 3 cutting and removal of old wire mesh supply cutting fixing and tack welding of new cs wire mesh quantity 1 lumpsum means 40 sqm , custom bid for services - 4 removal of old insulation along with cladding supply and refitting of insulation along with mineral wool wire mesh fixing screws and cladding sheets quantity 1 lumpsum means 50 sqm , custom bid for services - 5 supply of standard fire brick as per is 8 standard insulating brick including binding mortar and installing the brick as mentioned in the scope inside the lower boiler drum quantity 1 lumpsum means 12 sqm total quantity :