work contract for aoh of boilers non-pressure parts ( excluding raph ) of unit # 4 at 2x660mw, sstpp, mppgcl, dongalia ( t-2023_mppgc_286862 ) 1 section-a ( general overhauling work of duct, gates & dampers ( pa, sa & fg ducts ) 2 cleaning of ash from ducts 3 repairing of ducts by patching / welding 4 repairing of ducts by application of ms plate / angle / channel 5 replacement of bracing pipes / protective angles inside the ducts 6 servicing of dampers 7 servicing of guillotine gates ( including esp ) 8 servicing ofgear box of fd fan discharge gates 9 repairing / replacement of protection cover of nmej / mej 10 cleaning and inspection of mill hot / cold pa gates 11 cleaning, inspection & seal replacement of mill ha / ca gates 12 servicing of id fan suction / discharge gates ( 1 set= 2 nos ) 13 repairing of expansion joint small sized upto 3000mm 14 repairing of expansion joint above 3000mm 15 hydrojet cleaning of id fan outlet gates ( size of discharge gates 6912x3456 mm2 , 1set = 2 nos ) 16 section-b ( general overhauling work of fans ( id, fd, pa fan ) 17 complete servicing of induced draft fan 18 complete servicing of forced draft fan 19 complete servicing of primary air fan 20 servicing of lube oil and control oil system of id / fd / pa fan 21 alignment of id fans with motor 22 alignment of fd fans with motor 23 alignment of pa fans with motor 24 cleaning of complete fan including blades and silencers of pa, fd fans and inspection of main bearing assembly. 25 alignment of rotating oil seal of id, fd and pa fans 26 removal of top half of fancasing and diffuser, cleaning of complete fan including blades and silencers of pa fans and inspection of mba. 27 section-c ( general overhauling work of coal circuit ) 28 replacement of complete coal burner assembly 29 replacement / servicing of oil gun / air tip 30 alignment of burner tip with tilt mechanism inline with other burners from inside & outside the furnace 31 replacement and refixing of burner panel and additional air portpanels air seal plate with fastener 32 section-d ( complete overhauling work of coal mills ( make l&t mhi , modell no. mvm32f ) and rcf ( make stock redler model eg3651 ) 33 complete overhauling of coal mill ( including replacement of grinding parts ) and raw coal feeder 34 alignment of mill motor with gear box. 35 repairing / replacement / servicing of mpo, mdv, outlet orifice ( mill top ) , mpo plate, servicing of classifier vanes etc. 36 servicing, rectification of bunker outlet / feeder inlet / outletgate , mdv and kgv of coal pipe. 37 complete servicing of raw coal feeder including replacement of head pulley, tail pulley and coc system 38 replacement / repairing of rcf chute ( below rcf ) including feeder outlet gate with its alignment 39 replacement / repairing of center feed pipe and sleeve coupling 40 servicing of lube oil system and hydraulic oil system 41 removal, dismentling, servicing, alignment and reinstallation of roller journal assembly 42 painting of coal mill 43 repairing and resetting of bottom insulationcover plate 44 repairing / replacement of mill body side liner by providing patching of size 300x300 mm 45 repairing / replacement of air inlet ring segment ( air port ) assembly 46 replacement / repairing of upperskirt, lower skirt ( hub skirt ) & scrapper assembly 47 replacement / repairing of scrapper assembly 48 section-e ( inspection / repair / replacement andservicingof p.f. discharge pipe ) 49 replacementof p.f. bends 50 reversal of coal pipe bends after due repairing 51 changing of coal-pipe victualic coupling gasket 52 servicing ofcoal pipe hangers including repairing 53 servicing / repairing of sleeve coupling of coalpipes 54 replacementof straight coal pipe 55 rotation ofof straight coal pipe by 180 degree 56 repairing of p.f. bend & straight pipe by patch welding 57 removal / inspection of orifice in pf pipe lines 58 ( section-f ) general overhauling work of coal mill seal air fans 59 servicing / replacement of set of fan bearings and coupling 60 servicing / replacement of fan discharge valve / damper 61 replacement / repairing of expansion joints 62 cleaning / replacement ofdynavane / fabricfilter 63 complete alignment ofmotor &fan along with coupling 64 ( section -g ) general overhauling work of ac / dc scanner cooling fans 65 servicing , balancing and painting of ac and dc scanner air fans