Overhauling Of Boiler Pressure Parts Of 250 Mw Thermal Power Plant Of Unit8-1. Supply &Fitting of scaffolding at Furnace zone, PLSH By Couplok scaffolding. 2. Scaffolding of FSH, RH, LTSH & Economizer. 3. Cleaning of furnace (Boiler first pass), PLSH, FSH RH zone by HP water jet. 4. Cleaning of LTSH, Economiser, Pent house including roof, roof top, inside pent house accumulated ash, Dog House, Dead chamber, all Boiler area Buck stay including duct area inside & outside. 5. Boiler External cleaning from pent house elevation to zero meters by air & fire water. (Upto Coal Feeder Building including fans duct,ccp APH) 6. Arrangement & Assistance for Furnace Gas tightness test. 7. Hanger & Supports checking of critical pipings including air and flue gas duct area up to ID Fan (excluding ESP) & Boiler Buck stay checking. 8. DE metering of pressure parts ,Area to be covered: Furnace tubes at soot blower, burner mouth area gooseneck area, LTSH, Economiser, Steam cool wall, manhole areas, FSH, RH,Screen tubes etc. 9. a) Removal, fabrication & fitting of guard tube for Screen tube,scw, LTSH, Economiser, furnace wall. b) Removal, fabrication & fitting Cassette baffle for, LTSH, Economiser 10 Lifting & refitting of LTSH coil including terminal joints, and hanger tube joint. 11. DP test of stub joints 12 Insert in furnace wall tube.(including radiography) 13 Insert in LTSH ,Economiser,SCW tube. (including radiography) 14 Insert in FSH, PLSH, RH tube(including radiography) 15 Insert in screen tube (including radiography) 16 Deposition of weld metal on Boiler tubes, stubs, doors, headers etc. 17 Radiography of erection welding joints (single shot) 18 Skin casing welding. 19 Servicing for safety valves & Trevi test and actual popping of Drum-3, SH-2,RH-5 safety valves 20 Safety valve seat cutting 21 Servicing of soot blower safety valve. 22 Lifting & refitting of ECO coil including terminal joints 23 Stress relieving for pressure parts welding joint. 24 Roof loose tube proper clamping. 25 Fabrication of different size cold bends. 26 Economiser header stub joint replacement. 27 LTSH inlet header stub joint replacement. 28 Overhauling of Boiler Drum and drum internals. 29 Fins welding 30 Pressure parts area Miscellaneous job. 31 LTSH coil replacement. 32 Boiler Inspector Sundry expenses (other than fees) 33 MAGNETIC PARTICLE TEST (MPT) 34 Servicing of Man holes of boiler 35 Servicing of Peep holes of boiler 36 Hiring of reciprocating pump for departmental & inspector hydro test at 250kg/cm2 (B) INSPECTION & REPAIR OF PENT HOUSE, DEAD CHAMBER & DOG HOUSE: Inspection & Repair of pent house, dead chamber & house. LS 1 (C1) HIGH PRESSURE VALVE SERVICING: Overhauling of HP valve size above 25 mm & up to (class 2500 & 3000) Nos 20 Overhauling of HP valve size above 50 mm & up to mm (class 2500 & 3000) Nos 15 Overhauling of HP valve size above 100 mm & up to mm (class 2500 & 3000) Nos 2 Overhauling of HP valve size above 200 mm (class 3000) Nos 2 Overhauling of pneumatic operated Spray control Nos 19 Overhauling of Manual Operated spray control valve Nos 22 (C2) HP VALVE ACTUATOR CLEANING,GREASING & TIT-BIT MAINTENANCE: Servicing of Valve Actuator, size up to 50mm No 6 Servicing of Valve Actuator, size above 50mm &upto mm No 8 Servicing of Valve Actuator, size above 200mm &upto mm No 4 (D)REFRACTORY: Removal re-application of refractory MT 20 (F) BURNER SYSTEM (COAL & OIL BURNERS, WIND BOX, SADC, BURNER TILT WORK,BURNER ISOLATING GATE) 1 Coal Burner Servicing/Replacement Nos 24 2 Oil Burner servicing/ replacement Nos 16 2 SADC, Burner tilt Servicing & Wind box repairing. LS 1 3 Burner Isolating gate servicing NO 24
