overhauling of boiler 2nd pass ( phase-i ) during upcoming overhauling of unit#5 , btps under jurisdiction of banda dept . , btps , wbpdcl , scaffolding of 2nd passeconomizer zone , psh & prh zone and cleaning of same by lp water jet , inspection of economiser hopper run welding , all bracing pipe inspection , changing as per requirement , guard angle fitting up to aph inlet damper , removal and fitting of guard tube guard plate , d-metering of pressure parts , deposition of weld metal on tubes/ stubs/ header etc . , economiser coil lifting inspection and fitting with proper alignment ( including connection joint and rt ) , psh coil lifting inspection and fitting with proper alignment ( including 4 nos . connection joint/coil and rt ) , insertion joint of psh bottom bank tubesize: 63 . 5x6 . 3 , mat: bs3059/45s2 or sa210gr . c , insertion joint of psh middle bank tubesize: 63 . 5x8 . 8 , mat: bs3059/45s2 or sa210gr . c , insertion joint of psh top bank tubesize: 57 . 1x6 , mat: bs3059/620s2 or sa213t11 , insertion joint of cage rear wallbelow main cavity & baffle wall tube below main cavity , size:63 . 5x5 . 4 , mat: bs3059/45s2 or sa210gr . c , replacement of stub of different header , insertation joint of economiser tube38 . 1 x 3 . 6 mm , material bs 3059/45s2 , welding of membrane strip , inspection and correction of buck stay and steelwork ( including t and channel connecting joint with tube ) , fabrication of different sizes of bends u-loops etc . , skin casing welding by ms electrode , stress reliving of weld joints , refractory works , insulation work with sheet cladding ( de-insulation & re-insulation ) , radiography of weld joint , replacement of prh bottom bank coil rt and hydro test included , arrangement of 1 no . crane/hydra 10 ton , gst