tender for work contract for aoh of boilers- pressure parts of unit 3 at 2x660 mw, sstpp, mppgcl, dongalia.--1 section-a 2 preparation of quick erect scaffolding system ( cup-lock system ) in boiler furnace: 3 internal cleaning of boiler ii nd pass 4 cleaning of ash from economizer hopper, dead chamber, cat house dog house 5 preparation of scaffolding in boiler horizontal pass ( screen tubes, re-heater hanger, super heater hanger tubes ) 6 preparation of scaffolding above economizer hopper for inspection of economiser lower bank coils. 7 preparation of scaffolding at ww ring header for inspection of ring header & refixing / replacement of orifices. 8 inspection of complete boiler pressure parts ( i st & ii nd pass ) 9 inspection / repair of all peep holes in boiler 10 cleaning and repair of all wind boxes 11 servicing of secondary / additional air port dampers 12 preparation of scaffolding in bottom ash hopper and front / rear s- panel backside, covering the s- panel completely with sheets for simultaneous checking, repairing work in bottom ash area and furnace togather: 13 dye penetrationn test ( dpt ) 14 transportation of ash, scraps, debris and other waste material ( incl. loading. / unloading ) 15 thorough cleaning of boiler from inside by using hydro-jet cleaning method. 16 complete external cleaning of the boiler from top to bottom 17 section-b 18 rectification, replacement and refixing of protection sleeve ( shielding ) in various areas of boiler tubes. 19 preparation of boiler tube surface for tube thickness survey 20 ( section-c ) welding of hp joints and alighmentof boiler tubes / coils / banks 21 water wall tubes ( primary and secondary pass ) / rifle tubes, screen tubes, hanger tubes etc. 22 primary super heater tubes 23 secondary super heater tubes 24 tertiary super heater tubes 25 primary superheater support / hanger tubes 26 primary reheater support / hanger tubes 27 primary and secondary reheater tubes 28 roof tubes 29 economizer support tubes 30 economizer coils in reheater and superheater pass 31 alignment of coils oftertiary / final superheaters 32 alignment of coils ofsecondary superheaters 33 alignment of coils ofsecondry / final reheaters 34 alignment of coil of economizer 35 alignment of coil of primary superheater 36 alignment of primary reheater coil 37 welding of fins 38 re-enforcement of welded joints 39 checking and rectification of supports / hangers of critical pipe lines 40 checking and rectification of expansion indicator in boiler area 41 ( section-d ) application / repair of refractory ( whytheat c / whytheat c patch ) / bsf blanket at various locations of boiler 42 bottom ash hopper gr-c 43 pent house, doors & windows etc. ( additional air port / waterwall tubes ) gr.-c / htc 44 man holes, peep holes, roof seal boxes gr-c 45 hydraulic test of boiler pressure part & preparation for boiler light up 46 ( section-e ) 47 complete servicing / overhauling of hp valves ( miv / mov ) 48 >25 mm & upto 50 mm 49 >50mm & upto 100 mm 50 >100 mm & upto200 mm 51 above 200 mm 52 complete servicing of control valves ( excluding actuator ) . 53 >25 mm & upto 50 mm 54 >50mm & upto 100 mm 55 >100 mm & upto200 mm 56 above 200 mm