Hardfacing, dismantling and re-erection of pipes, bends, elbows, T-pieces/transition pieces of above classifiers, replacement/reversing of orifices in PF lines and tilting of straight PF lines for wornout pipes, replacemenmt of wornout straight pieces in PF lines by removing matching flanges and welding to the new pieces of PF lines of Units-5&6 during the annual overhaul period for the year 2017-18.