annual rate contract for maintenance of boiler pressure parts of stage-i and stage-ii btps under-2 economiser tube jointtube od 51 mm, thickness 4.8 mm, material: sa 210 gr.c orequivalent 3 insert at furnace wall, goose necks-pannel & roof tube ( 1 insert = 02 nos. joint ) tube od:63.5 mm to 69.9 mm, thickness from 5.1 to 6.3 mm, material:sa 210 gr. a or equivalent 4 joint at saturated screenroof & side wall, screen tube, primarysuperheater tube, secondary superheater tube. ( od: 63.5 mm, thickness: 5 mm upto 6.9 mm, material:sa213t11 or equivalnt ) 5 joint at reheater tube / insert at furnace wall, goose neck, s-panel &roof tube. 6 second pass scaffolding 7 economiser coil liftingrepairing, fitting & jointing with proper alignment for unit 1 & 2 ( ifrequired for preventive checking beyond leakage area ) 8 primary & secondary superheater coilpulling, inspection and proper alignment of coil & panelwith clit and support welding of unit 1 & 2 ( if checkingrequired for preventive inspection ) 9 maintenance of boiler pressure part stage-ii 10 lp water cleaningeconomizer zone, psh & prh 11 joint for lnsertion of water wall tube, cage rear wall below main cavity & baffle wall tube below maincavity, size: 63.5x5.4, mat: bs3059 / 45s2 or 5a210gr.c. 12 insertion joint for division wall tubesize: 82.5x7, mat: bs3059 / 45s2; or sa210gr.c 13 joint for lnsertion of furnace roof, cage rear wall & baffle wall tube above main cavity, size:63.5x4.8, mat: bs3059 / 620s2 or sa213t11 14 joint for insertion of economiser tubesize: 38.1x3.6, mat: bs3o59 / 45s2 or sa210gr.c 15 insertion joint of psh bottom & middlesize:57.1x6, mat: bs3059 / 620s2 or sa213t11 16 joint for insertion of psh top bank tubetube, size: 63.5x3.6, mat: bs3059 / 33s2 orsa210gr.c 17 insertion joint of prh bottom & middlesize: 57x3.2, mat: bs3059 / 620s2 or sa213t11 18 joint for lnsertion of prh top bank tubesize: 57x3.2, mat: bs3059 / 620s2 or sa213t11 19 joint for lnsertion of plsh and fshinlet tube, size: 44.5x7, mat: sa213t22 20 joint for lnsertion of fsh & frh tubesize: 50.8x3.6, mat: sa213t91 21 economiser / psh / prh coil lifting, inspection repairing and fitting with proper alignment ( if requiredfor preventive inspection beyond the leakage area ) 22 platen sh, fsh, frh coil pullinginspection and proper alignment of coil and panel with clit andsupport welding 23 second pass scaffolding per 6 meter 24 common work for stage-i&ii 25 stress relieving 26 radiography 27 removal and refitting of refractory 28 replacement of high pressure valve size upto 2 29 replacement of high pressure line ( 1 / 2 to 4 ) ( unit of 01 number includes two joints ) 30 deinsulation & insulation with claddingof wall, casing and pipe and other area of boiler 31 hp valve welding from 50 nb upto 100 nbpipe 32 hp valve gland packing replacementupto 6 33 hp valve servicingincluding gland packing & bonnet seal replacement upto 4 34 d-metering of boiler tubeat any area of boiler for thickness measurement ( minimum survey150 nos. / day ) 35 minimum mobilization chargeif total executed job value less than rs.15000.00 36 vertical scaffoldingfor approaching roof tube / reheater / secondary sh ( per 6 metervertical ) for stage i & for approaching furnace / roof tube / pendent reheater / platen / fsh & division wall ( per 6 metervertical ) for stage ii 37 horizontal scaffolding for approaching platen sh / scw / roof tubes / furnace ( per 6meter horizontal ) for stage i & for approaching rh / platen sh / final sh / divisional wall / scw / roof tubes / furnace ( per 6 meter horizontal ) for stage ii 38 guard tube and guard plateremoval, fabrication and fitting 39 build up in eroded tubesas per requirement 40 repairing of skin casing 41 fabrication of bends of any degree of any boiler tube 42 fitting and welding of tube attachment wherever require 43 membrane strip fitting & welding 44 fabrication and erection of steel itemsby ms plate / ms angle / ms channel / i beam etc. 45 boiler metal temp tc & mounting replace 46 thermowell replacement in hp line