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| 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 OF TERTIARY/FINAL SUPERHEATERS |
| 32 | ALIGNMENT OF COILS OF SECONDARY SUPERHEATERS |
| 33 | ALIGNMENT OF COILS OF SECONDRY/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 | PAD WELDING OF BOILER TUBES AT VARIOUS LOCATIONS (SIZE 50mmX50mm) |
| 40 | CHECKING AND RECTIFICATION OF SUPPORTS/HANGERS OF CRITICAL PIPE LINES |
| 41 | CHECKING AND RECTIFICATION OF EXPANSION INDICATOR IN BOILER AREA |
| 42 | (Section-D) APPLICATION/REPAIR OF REFRACTORY (WHYTHEAT C/WHYTHEAT C PATCH) / BSF BLANKET AT VARIOUS LOCATIONS OF BOILER |
| 43 | BOTTOM ASH HOPPER GR-C |
| 44 | PENT HOUSE, DOORS & WINDOWS ETC. (ADDITIONAL AIR PORT/WATERWALL TUBES) GR.-C/HTC |
| 45 | MAN HOLES, PEEP HOLES, ROOF SEAL BOXES GR-C |
| 46 | HYDRAULIC TEST OF BOILER PRESSURE PART & PREPARATION FOR BOILER LIGHT UP |
| 47 | (SECTION-E) |
| 48 | COMPLETE SERVICING/OVERHAULING OF HP VALVES (MIV/MOV) |
| 49 | >25 mm & up to 50 mm |
| 50 | >50mm & up to 100 mm |
| 51 | >100 mm & up to200 mm |
| 52 | Above 200 mm |
| 53 | COMPLETE SERVICING OF CONTROL VALVES (EXCLUDING ACTUATOR). |
| 54 | >25 mm & up to 50 mm |
| 55 | >50mm & up to 100 mm |
| 56 | >100 mm & upto200 mm |
| 57 | Above 200 mm |
| 58 | REPLACEMENT OF VALVES (WELDED TYPE) |
| 59 | Up to 25 mm |
| 60 | >25 mm & up to 50 mm |
| 61 | >50mm & up to 100 mm |
| 62 | (SECTION-F) 6.1. COMPLETE SERVICING OF SPRING-LOADED SAFETY VALVES |
| 63 | WATER SEPARATOR SV |
| 64 | MAIN STEAM LINES SV |
| 65 | CRH LINES SV |
| 66 | HRH LINES SV |
| 67 | ELECTROMATIC RELIEF VALVE AND PILOT VALVE |
| 68 | (SECTION G) |
| 69 | PREPARATION OF HP TUBE BENDS |
| 70 | REPAIR OF PENT HOUSE/SKIN CASING OF BOILER |
| 71 | REPAIRING OF DEAD CHAMBER |
| 72 | (SECTION H) APPLICATION OF THERMAL INSULATION |
| 73 | COMPLETE BOILER FROM BOTTOM ASH HOPPER TO PENT HOUSE |
| 74 | STEAM AND WATER PIPING |
| 75 | ESP |
| 76 | AIR HEATER & HOPPER |
| 77 | FUEL OIL AND ITS STEAM PIPING INCLUDING HEATERS FILTERS ETC. |
| 78 | (SECTION -I) |
| 79 | SERVICING OF MAIN STEAM STOP VALVE |
| 80 | SECTION-J |
| 81 | COMPLETE OVERHAULING & RESETTING OF WATER WALL SOOT BLOWER: - |
| 82 | COMPLETE OVERHAULING & RESETTING OF LONG RETRACTABLE SOOT BLOWER: - |
| 83 | (SECTION -K) INSTALLATION AND MAINTENANCE OF CCTV CAMERA TO DIFFERENT LOCATIONS OF BOILER |
| 84 | work of installation and implementation of CCTV surveillance system during AOH |
