BI Annual Maintenance Contract of Boiler pressure parts

Amount

BOILER PRESSURE PART

Attending the leakage of water wall tube in the boiler from down comer ring header to 52M/L, including burner zone and platen water wall (as per procedure). a)Attending tube leakages up to first 10 joints (Irrespective of weld joint in one job)

b) Attending tube leakages of each weld joints beyond 10 joints.

Attending tube leakage from economizer and convective super heater as per procedure a) Attending tube leakage up to first 10 joints (irrespective of weld joints in one frequency)

b) Attending tube leakage of each weld joint beyond 10 joints.

Attending leakage of following parts (i) Platen super heater, (ii) Ceiling super heater tubes situated on the furnace top before paten super heater as per procedure annexed. A) Attending Tube leakages up to first 10 joints.

B) Attending tube leakages of each weld joint beyond 10 joints.

Attending tube leakages of following parts-i)Cold Reheat, ii)Hot Reheat, iii)Arch tubes, iv)Screen tubes, v)Extended water wall tubes, vi)Hanger tubes, vii)Exit S/H tubes, viii)Ceiling S/H tubes, ix)Headers Nipple tubes. a) Attending tube leakages up to 10 joints.

b) Attending tube leakage of each weld joint beyond 10 joints.

Attending tube leakages in SCW and extended super heater as per procedure annexed. a) Attending tube leakages up to first 10 joints.

b) Attending tube leakages of each weld joint beyond 10 joints.

Attending Pin hole crack of boiler tubes, headers stubs etc. in entire first pass, second pass, furnace zone, pent house etc.

Attending the leakage of hand hole plates of different pressure part header by removing hand hole plates with hand hole cutting equipment, re-welding of the same after complete preparations and stress relieving of the same after welding if required.

Attending the leakage of header stubs up to Ist ten stubs joints in one frequency of different pressure parts headers of boiler.

Removal of damaged clamps/binders/scallop bars etc. and replacement/refitting of the same with new/repaired one in different zones of the pressure parts- a) 'U' Clamps

b) Scallop Bars

c) Binders, Support band, lugs

d) Flexible Connectors (male/female)

Fabrication of Hot bends of various degrees and radius of curvature from straight pressure parts tubes by filling sand and heating gas to required temperature of following materials - a) Carbon Steel.

b) Alloy Steel.

Replacement of eroded/damaged tubes/bends of pressure parts in different zones of boiler during preventive maintenance as per procedure mentioned in annexure of the following - a)Carbon Steel/Low alloy (T-11) joint.

b)High alloy (T-22) joint.

c)Stainless Steel joint.

Cutting and removal of skin casing/high crown plate by grinder and welding the same with suitable electrode by high pressure welding method, after completion of repair jobs of pressure parts if any - a) Thickness - upto 15 mm

b) Thickness - above 15 mm

Erection of scaffolding and plateform in S-Panel and bottom ash hopper

Fins welding of water wall & steam cooled wall (Single side of fin welding length).

Complete washing of Boiler - a) Complete washing of False Ceiling.

b)Complete washing of Pent House.

c)Complete washing of Dog House.

d)Complete washing of Cat House.

Complete washing of Re-heater gallery.

Complete washing of all plateform (from 8m/l to 52m/l).

Washing Over SA duct from APH outlet to wind box (L&R).

Washing of wind box (L&R).

Washing of area between front side of Boiler & RC Bunker

Rectification/replacement of ash protectors/ shielding/cassette baffles found damaged/eroded /distorted or providing new protectors in the following pressure parts Zone of Boiler a)Tubular protectors/shielding of SH tubes,RH tubes,Water Wall tubes,LTSH Coils, Economizer coils and other area of boiler. For installation of protectors necessary scaffolding has to be made by the agency.

Box type protectors/cassette baffles of LTSH Coils, Economizer coils etc. For installation/rectification of protectors necessary scaffolding has to be made by the agency.

Inspection of Pressure Parts Tubes and Build-up of eroded portion caused by ash/steam erosion using suitable welding electrode matching with parent metal composition by Arc/Argon welding of 250mm length, 35mm width.

Erection of scaffolding and making approaches for checking of pressure parts tubes for rectification of defect, If any, in the following areas/zones and dismantling after completion of work a)Super Heater/RH /W.W. Screen tube/SH screen tube/Low temperature super heater/ Economizer etc in single layer/elevation.

b)Super Heater/RH/W.W. Screen tube/SH screen tube/Low temperature super heater/ Economizer etc in multi layer/elevation.

Mobilization of team, Installation & Fixing of sky climber in boiler furnace after making proper plateform on bottom ash hopper. Dismantling and removal of sky climber/ash hopper plateform after completion of job.

Shifting of sky climber in boiler furnace at different location and inspection of various pressure part zones.

Operation of Sky Climber up to 24 hrs.

Operation of Sky Climber outside of boiler for checking its healthiness.

Servicing of control panel box of sky climber (motorized rope climbing machine).

Servicing of gear box, break assembly, internal drums and rollers of sky climber motor assembly.

Work of Loading/unloading/stacking & up keeping of site stor/transportation of material/spares from Sore Division to site store of BMD-I/BMD-III, Obra.

Removal of accumulated soot from heating surface by way of wall blowers No. 01 to 56 for unit no 9th 10th & 11th, 3×200MW, BTPS, Obra. (During 8:00 hrs. Time-9:30 hr to 17:30 hr)

Removal of accumulated soot from heating surface by way of wall blowers No. 01 to 56 for unit no. 12th & 13th, 2×200MW, BTPS, Obra. (During 8:00 hrs. Time-9:30 hr to 17:30 hr)

Servicing of RWSE water wall deslagger

Replacement of Flange Gasket of head valve assembly of Wall Blower &Orifice of soot blowing system

Servicing of gear boxes of Rotary/Traverse motion of wall blowers.

Replacement of damaged Swivel Tube of Wall Blowers

Complete servicing/Provisioning of head valve of wall blower.

Rectification of LTSH lower bank coils by replacing U bends, 90̊ bends and straight tubes (Rectification will involve at least 16 nos. joints which may be more depending on condition of coil)

Rectification of economizer coils by replacing U-bends, Straight tubes, their alignment & clamping (Rectification will involve 16 nos. joints which may be more depending on condition of coil).

Rectification of Re-heater coils by replacing bends, Straight tubes, their alignment & clamping (Rectification will involve 16 nos. joints which may be more depending on condition of coil. And fabrication of bend is also included in scope of work, if bends are not available).

Work of breakdown maintenance of main boiler, round the clock boiler checking and gun cleaning in units-9 10 11 12 and 13 of 5x200 MW units” Servicing of oil gun guide assy at AB, CD & EF elevation by replacement of damaged parts by new one.

Repairing of eroded adjustable coal nozzle tip when the same is lying outside

Repairing of eroded coal nozzle when the same is lying outside

Replacement of coal burner assy. by new/repaired one.

Replacement of oil gun assy at AB, CD & EF elevation by new/ repaired one.

Repairing of guide assembly at elevation AB, CD & EF.

Repairing/replacement of scanner guide assly.

Repair/replacement of scanner and opening the bolts of flange & taking it out.

Repair/Refitting of scanner guide assembly.

Replacement of air nozzle by new/repaired one.

Repairing of buldge/burnt air nozzles.

Repairing & replacement of defective/burnt air nozzle.

Servicing of secondary air damper in wind box.

Repairing of secondary air damper in wind box.

Repairing of Manhole of boiler.

Replacement of packing of manholes.

Repairing of Boiler Peep Holes.

Replacement of packing of Boiler peep holes.

Providing pin of spring/hanger supports of feed line,steam lines.

Furnace Ceiling repairing by cutting & welding in Pent House.

Welding of Hot & cold primary & secondary air ducts.

Alignment and fixing of supports of hot air ducts.

Laying of HP steam/water pipelines of dia 15 mm to 100 mm.

Two coat hard facing (One horizontal & one vertical at the distance of ½” on any equipment).

Cleaning & disposal of fly ash and foreign material Wind box (Right)

Cleaning & disposal of fly ash and foreign material Wind box (Left)

Cleaning & disposal of fly ash and foreign material Cat house (Front & rear)

Removal fly ash from economizer chamber at 35 M/L.

Removing fly ash from the gallery between Re-heater & arch tubes.

Removing fly ash form the gallery between exit super heater & hanger tubes of convective super heater.

Removing fly ash from second pass.

Removing fly ash from the gallery between platen super heater and cold reheat headers in pent house

Removing fly ash from the galleries in left & right of the pent house, between water tubes & skin cashing.

Removing fly ash from the gallery between cold reheat and hot reheat header in pent house.

Cleaning of riser tube economizer water wall & connecting tubes of super heaters by means of wire brush and old clothes.

Alignment and providing proper supports to rods of buck stay furnace economizer & super heater zone from 16 M/L to 48 M/L in boiler.

Rectification of guide pipe & plates of hydraulic seals at all the four sides above bottom ash hopper.

Rectification of hinge supports of wind box of boiler at 19 M/L (L&R).

Rectification of Tie Rods in Pent House of 48 M/L side at boiler.

Servicing & repairing of hanger supports of Main steam, cold reheat,hot reheat, feed line and down corners of boiler form 13 M/L to 54 M/L.

Making coal compartment assly by making coal nozzles with seal plate & adjustable seal nozzle SS tips.

Replacement of worn out and damaged railing of boiler from zero meter to 54 M/L by old & used economizer tubes.

Repairing/replacement of corner attachment of water wall and super heater.

Alignment of buck stay beam (Horizontal & Vertical) from 8 M/L to 48 M/L.

Strengthening & alignment of scanner angles of furnace.

Cleaning & disposal of fly ash and foreign material From Dog House

Cleaning & disposal of fly ash and foreign material Above furnace top and inside Pent House.

Cleaning & disposal of fly ash and foreign material Below drum inside the Pent House.

Servicing/Overhauling of fill pump.

Servicing/Overhauling of Washing Pump

Shifting washing pump from 10th Unit Boiler 16 mtr, corner no.1 to 12th Unit Boiler 16 mtr, corner no.1 & then after completion of work again shifting to 10th Unit.

Fitting of chucker plates/plates/new/old grills with supporting ‘I’ beams/Channels /angles up to 150 mm by replacements.

Replacements of ‘I’ beams/Channels 200/250 mm size of the required length up to 5m long of platform by cutting and welding.

Replacements of ‘I’ Beams of size 300 mm and above of required length up to 5m long of platform by cutting and welding.

Fabrication and Repairing of ladders.

Cleaning of Filter of Scanner Fan

Replacement of scanner Fan Impeller

Round the clock Checking of Boiler, Oil Gun Cleaning/ replacement, Cleaning of coal dust from furnace zone for Unit 9, 10 &11.

Round the clock Checking of Boiler, Oil Gun Cleaning/ replacement, Cleaning of coal dust from furnace zone for Unit 12&13

Annual breakdown /running maintenance of H.P./ L.P. valve of Boiler sde of 5X200MW, BTPS, Obra Servicing of Feed line / Steam line gate valves / control valves viz.V2-116/V2-117/V2-85/V2-86/FCV-1&7/ V2- 48/56 (L/R) / E2 etc.

Servicing of E-2 NRV (Nb-300mm, Np-250 Kg/cm2).

Servicing of Low Load line gate valves / Control Valve(FCV-2).

Servicing of pneumatically operated S/H spray valve (E-19). Valve size Nb150mm, NP-250Kg/cm2.

Servicing of pneumatically operated R/H spray (R-17) valve.

Servicing of pneumatically operated S/H / R/H spray control /isolating valves.

Servicing of bypass valve of main steam line valve.

Servicing of boiler drum safety valves at 52meter elevation.

Servicing of electromagnetic relief valve (implus safety valve).

Servicing of safety valves installed on hot reheat, cold reheat line and main steam line on right hand side of boiler at 52meter elevation.

Servicing of safety valve on soot blower line at 52mtr elevation.

Servicing of following sizes Valves- a)15 mm to 25 mm Valves.

b)40 mm to 50 mm Valves.

c)65 mm Valves.

d)100 mm Valves.

e)150 mm to 200 mm Valves.

Servicing of high-pressure valve & NRV’s at different elevation from ‘0’meter level to 54meter level nominal bore may vary from Ø10mm to Ø100mm.

Servicing of L.P. Valves of Air Line,/Oil Line / Water Line

Replacement/Servicing of the following Actuators- a)V2-116/ 117/ V2-85 / 86/ V2-48/56 (L/R)/ E-2 Valves.

b) B-55/ S-16 and soot blower isolating Valve size 65 mm.

Replacement of following sizes Valves - a)15 mm to 25 mm Valves.

b)40 mm to 50 mm Valves.

c)65 mm to 70 mm Valves.

d)100 mm Valves.

e)150 mm to 200 mm Valves.

f)R-17 Valves.

Changing flange gasket of valve at different elevation of boiler.

Replacement of gland packing with new one.

Replacement of various safety valves of such as Boiler Drum/Main Steam/CRH/HRH line etc.

Replacement of high Pressure valves (motor operated / hand operated/ Pneumatic operated) of critical piping of Boiler of size: Nb-40mm to 65mm.

Replacement of Bends/Straights of High Pr. Drain Line/Air Vent Line/Air Line (Up to one meter length) - a)Size Ø 16 mm X 1.5 mm to Ø 44.5 mm X 4.5mm.

b)Size Ø 45 mm X 4.5 mm to Ø 80 mm X 7.1 mm.

Welding of Main Steam Line Joint By TIG Welding.

Repairing of Main Steam Line Joint.

Welding of Cold Reheat / Hot Reheat Line.

Attending minor leakage from Pipe & Bends.

Replacement of 300 mm Valves of Feed Line /Main Steam Line.

Replacement/Repairing of shade at the different area of Boiler side.

Replacement of gasket of manhole of boiler drum.

KIRAN CONSTRUCTION COMPANY (BID ID -5046560)

M/S K K POWER CONSTRUCTION (BID ID -5050332)