notice inviting e-tender for lining up the contract for repair of c1 trays in all the three units of urea plant at rcf thal at rcf thal , c-1 trays job of urea plant ( as per scope a ) , removal & re-fixing of 4 no . bubble cap trays including minor repairs , levelling , adjusting , alignment of trays , minor rectification in tray support ring , distributor , leak test etc . ( in rs . lump sum per column ) , removal & refitting of each bubble cap tray including minor repairs , leveling , adjusting , alignment of trays ( applicable in case only one or two trays are removed & boxed up ( in rs . per tray ) , repair to tray support ring involving heating , cutting , welding etc . ( in rs . per tsr ) , replacement of tray clamp bolt as per requirement . ( bolt will be suppiled by rcf ) ( in rs . each ) , distributor inspection , removal , rectification & refitting including leak tests . ( in rs . lump sum per column ) , lumpsum charges per column for weld of segment tray insitu , mobilisation charges . ( in rs . per trip )