AMC ARC OF BOILER AND AUX UNIT VI

Amount

RATES TO BE QUOTED FOR FIRST (1st) YEAR:

PART-A: FIXED LUMPSUM RATES FOR FIRST (1st) YEAR: Lump Sum Rate for fixed Main Scope of work under PART-A (i.e. work of Annual Maintenance Contract for Routine / Preventive / Breakdown maintenance of Boiler & its Auxiliaries (Pressure part, HP Valves, Rotary Machine, RAHs, ESP & Ducting etc. & Common Activities (as per scope of work mentioned at Annexure-IX of e-NIT documents)

PART-B: VARIABLE ITEM RATES FOR FIRST (1st) YEAR: For Scope of work under PART-B (as per Annexure-X of e-NIT documents), (from Sr. No. 2.11 to 7.19 below)

PART-B-I): BOILER PRESSURE PART, BURNER, HP VALVES ETC. (from Sr. No. 2.11 to 2.53 below)

Mobilization & attending the boiler tube leakage / preventive mtc. of pressure parts tubes in Boiler area. It includes cutting, welding, fit-up, grinding and replacement of tube of all sizes and thickness involving upto 10 nos. HP joints. Note:- i) 03 Nos. Metal Built-ups each having half round surface by HP welder upto 100mm length will be considered as one joint and each window type joint will be considered as equivalent to 3 normal joints. ii) Through inspection for identification of failed tubes & inspection of adjoining area in vicinity of failed tube(s) will be in the scope of work of contractor. iii) To identify and attend the tubes found damaged & eroded tubes due to secondary damage. iv) A separate gang includes highly skilled IBR HP welder, grinder man, fitter, inspection team & technician etc. to be deployed by the contractor for attending Boiler tube leakage and inspection. Minor scaffolding (i.e. up to using 5 nos. metallic jalies only for height of 1 mtr. from base will be in scope of contractor & no separate payment will be made).

Carrying out HP joint in addition to 10 nos. joints mentioned in above point in boiler area. It includes cutting, welding, fit-up, grinding and welding of one no. joint of tube of all sizes and any thickness of boiler in area covered under above point.

Metal build up on worn out boiler tubes half round surface by HP welder upto 100 MM length.

Fin welding work on water wall / steam cooled wall tubes etc. by HP welder.

Attending leakage by welding of HP Joints at outside of the boiler including replacement of Boiler tube with thickness less than 5mm up to 1 Mtr. Length & Valves/Bends upto size of 4" Dia. by cutting, welding, grinding and fit-up work for each joint.

Replacement of new HP Valves of thickness more than 5mm using heat treatment process. NOTE: In case HP welder capable of doing the above work does not reach PTPS within 8 Hrs. of verbal/written/SMS instructions by EIC (i.e. AEE/AE Concerned) or higher authority & hence work could not be started or welder engaged is found incompetent then penalty of Rs. 5,000/- per day will be imposed on the contractor which will be in addition to other penalty clauses as applicable. Also, the work will be got carried out through outside agency at the risk & cost of the contractor and hence deducted from his running bill/s. It is pertinent to mention that above value of risk & cost will be over & above the penalty amount.

Repairing of inlet/outlet header of Economiser/LTSH/Steam Cooled Wall/Re-Heater/Super Heaters/Water Wall etc. i) Surface preparation of the eroded / cavity / eated away portion by gauging followed by grinding of above Boiler header so as to fill/repairing the same by welding method as per site requirement. ii) Edge preparation of eroded portion of Boiler header by grinding to make the space for filling the weld material so as to repair as per site requirement. iii) Preheating of the damaged portion is to be carried before doing welding on the eroded potion of the header as per the designated welding & heat treatment procedure as per IBR regulations. iv) Pre-heating of prepared grinded portion of such header to 150 degree before doing the welding on the same. v) Eroded portion of header is to be repaired by applying the 1st root of TIG welding followed by pre heating as explained above. vi) Repairing of damaged & grinded portion of Boiler header and shall be welded with compatible welding electrodes matching with specification of parent material of header followed by pre heating as explained above after every root. vii) On cooling of each root, the DP test is to be carried out for detection of any cracks/holes. viii) Any other work to complete the job as per site requirement will be in the scope of contractor.

Mobilization and De-mobilization Charges along with their all T&P for carrying out the Stress Relieving treatment of repaired headers of Boiler area as per IBR regulation. Any other work to complete the job as per site requirement will be in the scope of contractor.

Service Charges towards deputing for carrying out the Stress Relieving treatment of repaired headers of Boiler area as per IBR regulation. It includes proper Post weld heat treatment as per standard procedure of IBR i.e. upto 610 degree Celsius for 05 hours after completion of welding shall be covered suitably by ceramic insulation to maintain controlled cooling upto atmospheric temperature to remove the internal stresses. Any other work to complete the job as per site requirement will be in the scope of contractor.

Stress Relieving treatment of HP Joints of size upto 2.5 inch

Stress Relieving treatment of HP Joints of size 2.5 to 5 inch

Inspection and Thickness measurement of pressure part tubes in erosion prone area by De-metering.

DP Test of Stub Joints

DP Test of DMW Joints of tubes.

Complete servicing of HP valve spare including lapping of seat /disc dismantlement & re-erection / refitting, replacement of spares. (Valves Gate/ Globe / NRV / Steam traps Seats etc. up to 150mm).

Replacements of gasket of man hole of boiler drum including minor repair/grinding, if any

Repair, rectification & re-fixing of cassette baffles/Replacement of cassette baffles on various boiler tubes

Providing / Re-positioning of twisted/dislocated protective shields/Replacement of shielding plates/shrouds plated on various boiler

Casting refractory on Boiler & its auxiliaries.

Providing skin casing with MS plate

Providing buck stay pin / repairing of buck stay.

Erection of Scaffolding & Platform at Platen SH, Re-heater, Final SH, Screen Tube, LTSH etc. in addition to the work covered in part-A. Dismantlement of the same after completion of the mtc. works. (Upto 05 Meter, Erection time will be 10 Hrs. & Dismantlement time will be 5 hrs.) (Upto 10 Meter, Erection time will be 15 Hrs. & Dismantlement time will be 8 hrs.) Note: All type of Scaffolding materials i.e. pipes, clamps, challies etc. is to be arranged by the contractor. Only metallic Challies/Jali/Channel Sheet must be used.

Erection of Scaffolding & Platform at 01 Corner inside at any area of boiler & its auxiliaries except Platen Super Heater & Re-heater in addition to the work covered in part-A. Dismantlement of the same after completion of the mtc. works. (Erection time will be 16 Hrs. & Dismantlement time will be 10 hrs.) Note: All type of Scaffolding materials i.e. pipes, clamps, challies etc. is to be arranged by the contractor. Only metallic Challies/Jali/Channel Sheet must be used.

Pulling of Pressure part Coil/Panels: i) Pulling apart neighboring coils of LTSH/Re-heater/FSH of leaking coils to create the accessibility for attending/welding of the damaged coils. ii) The contractor will also help in attending job by doing grinding & cutting of the damaged coils and cleaning work as required for doing the above job. iii) Restoring the above coils to their original position after completion of work mention as above a). iv) Completion Period: 03 Hrs. for a) & 5 hrs. for iii).

Erection of Scaffolding & Platform between 02 Corners inside at any area of boiler except Platen Super Heater & Re-heater in addition to the work covered in part-A. Dismantlement of the same after completion of the mtc. works. (Erection time will be 20 Hrs. & Dismantlement time will be 12 hrs.) Note: All type of Scaffolding materials i.e. pipes, clamps, challies etc. is to be arranged by the contractor. Only metallic Challies/Jali/Channel Sheet will be used.

Sealing of Bottom Ash Hopper at S-panel area at 8 meter elevation. (Erection time will be 48 Hrs. & Dismantlement time will be 24 hrs.) Note: All type of Scaffolding materials i.e. pipes, clamps, challies etc. is to be arranged by the contractor. Only metallic Challies/Jali/Channel Sheet will be used.

Internal water washing of Re-heater/Goose neck area/Final Super Heater Zone/Screen Tubes etc. for attending the tube leakage in zone of Re-heaters/Platen Super Heater/Final Super Heater/Extended SCW/Extended Water wall/Spacer Tube & Top Radiant/Ceiling roof etc.

Complete Internal water washing of 2nd pass area of boiler including Re-heater/Goose neck area/Final Super Heater Zone/Screen Tubes/Platen Super Heater/both RAHs/Economiser Hoppers/RAH & Ducts hoppers etc.

Complete External water washing of boiler from boiler top to zero meter elevation.

Checking of Burner Tilt Mechanism and rectification thereof at one corner. i) Disconnections of all reach rods from burner tilt mechanism as per requirement. ii) Dismantling of burner tilt mechanism including removal of drive shaft after disconnecting from burner tilt power cylinder. iii) Removal of burner tilt power cylinder from its position if required by C&I mtc. and refitting of same & replacement of burner tilt shear pin/ other pins, if found damaged. iv) Lubrication of pins, shafts, studs of reach rod etc. as per requirement. v) Repair/ replacement of reach rod turn buckle, pivot pins, pins of tilting mechanism as per requirement. vi) Assembly & refitting of burner tilt mechanism. Connections of all reach rods to burner tilt mechanism and zero setting of all nozzle tips. vii) Tilting trail of burner tilt. Ensure free operation of burner tilt upto +/- 30 degree connecting with power cylinder and trail operation power cylinder.

Rectification of jammed secondary air damper from inside wind box. i) Cleaning and removing of all the ash accumulated in SADC partition plate in all the four corners and cleaning shafts and bush with diesel/ restoline etc. as per requirement. ii) Repair/ replacement of damper flaps, bush, glands, links and partition plate of damper compartment as per requirement. iii) Making damper operation free & smooth. iv) Providing damper movement indicators over the shaft as per requirement. v) Repairing secondary air damper lever & its connection with damper power cylinder if required. vi) Removal of bush of drive end & non drive end along with bush housing in case of jamming of SADC, if required & refitting of same after repairing or replacement by new. vii) Repairing and replacement of stopper. NOTE: Scaffolding if required for above work will be paid extra as per unit rate.

Rectification of jammed secondary air damper from outside wind box.

Repairing/Servicing/Replacement of scanner guide assembly including its removal from panel, repair/replacement of worn-out parts if required and checking its movement with tilting mechanism.

Repairing/Servicing/Replacement of Igniter guide assembly including its removal from panel, repair/replacement of worn-out parts if required and checking its movement with tilting mechanism.

Opening/closing of oil gun/coal nozzle/air side chamber/Burner plate for inspection

Removal, refitting & servicing of burner isolating gate with replacement of gaskets etc. at furnace end. In case work is not started within reasonable time after verbal/ written/ SMS instructions by EIC (i.e. AEE/AE concerned) or higher authority or manpower engaged is found incompetent then penalty of Rs. 5,000/- per day will be imposed on the contractor which will be in addition to other penalty clauses as applicable. Also work will be got carried out through outside agency within the notice period of 12 hours at the risk and cost of other agency of the contractor and hence deducted from his running bills. It is pertinent to mention that above value of risk will be over and above the penalty amount. NOTE: All the associated works such as removal/ locking of fuel inlet elbow, removal of Victaulic coupling etc. Required for completion of above job is included in scope of work.

Repairing of boiler seal trough dipping plate which includes lifting/lowering/bolting etc as per requirement.

Repair/replacement of tie rod of any hanger in boiler area.

Replacement of SS wire mesh in seal trough area

Complete servicing of wall soot blower. i) Opening of top cover of wall blower. ii) Decoupling of gear box. iii) Replacement of damaged parts/spare like changing glands / gaskets, parts etc. if any. iv) Servicing / repairing / assembling after checking / inspection / replacement of damaged parts to make free movement of wall blower shaft and gear. v) Re-assembling of gear box. vi) Fitting of top cover. vii) Top up of oil in to gear box. Trail run of soot wall blower. viii) Any other job required to complete the above activity is included in the scope of work.

Servicing/Replacement/Rectification of LDO Pump/Cartridge/Mechanical seal

Servicing of Boiler safety valve including replacement of disc, spindle & other spare parts as per requirement

Lifting and lowering & re-fixing of economizer module / LTSH module for maintenance purpose (excluding any HP joints).

PART-B-II) Boiler Rotary Parts i.e. Fans, APHs, ESP & Ducting etc. (from Sr. No. 3.11 to 7.19 below)

1) ID / FD / PA /Seal Air / Scanner Air Fans & Seal air blowers (from Sr. No. 3.11 to 3.24 below)

De-coupling of ID / FD / PA Fan with its motor & Coupling of the same after alignment/maintenance works.

Replacement of blade pitch control system (i.e. Hydraulic Cylinder) of FD Fan

Opening of top casing of FD Fans including Removal/Replacement of Fabric Expansion joint of casing for inspection or other related works & Re-fixing of the same after completion of the work.

Attending oil leakage of bearing housing of FD Fans from oil connecting lines.

Replacement / Servicing of Main bearing assembly. (It excludes the works already covered under all above points i.e. 3.13 & 3.14 but It includes the complete dismantlement of Main bearing assembly from the FD Fan Housing, Shifting of the same to DG set house of Unit-5&6 for their through inspection / servicing / replacement of the damaged spares and fitting back to their original position into the FD fan.)

Replacement of Servo motor assembly / Blade bearing assembly of FD Fans. (It excludes the works already covered under all above points i.e. 3.13, 3.14 & 3.15 but It includes the dismantlement of Servo motor assembly / Blade bearing assembly from the FD Fan Housing, Shifting of the same to DG set house of Unit-5&6 for their through inspection, if required and replacement / fitting back to their original position into the FD fan with new one or repaired assembly.)

Replacement of FD Fan Complete Blade set of Blade Bearing Assembly. (It excludes the works already covered under all above points i.e. 3.13 & 3.16 but It includes the followings: i) Removal of the damaged blades, by opening the Allen bolts along with all the parts i.e. sealing rings, o-ring baskets, bush etc. ii) Internal cleaning of all parts. iii) Installation / replacement / fitting back the new blades along with all requisite accessories i.e. sealing rings, o-ring baskets, bush etc. to their original position with new one or refurbished. iv) Physical inspection of blades & its movement. v) Tightening of foundation bolts etc. of the fan. vi) Checking of connections of servo motors and locking the nuts by its tightening. vii) Repairing of casing as per site requirement. viii) Checking of clearance of fan blades with casing and grinding the same, if required as per site requirement. ix) Checking the alignment of fan rotor with motor and re-alignment of fan & motor, if required. x) Balancing of fan, if required as per site requirement with the help of service engineer which will be arranged by HPGCL at its own cost. xi) Fixing of coupling guard between fan and intermediate shaft. xii) Engagement of actuator with hydraulic impeller blade adjustment system. xiii) Setting of opening & closing of blade pitch from 0 to 100%. xiv) Trail run of PA fan for smooth operation and assisting in checking of vibration of the fan. xv) Any other work to compete the job shall be included in the scope of work of contractor.)

Removal of impeller of scanner air fan from motor shaft and its refitting.

Replacement of the scanner air fans/air blowers of ID Fans with new one/repaired

Attending cooler tube leakage of lube oil system of FD fans.

Repair/replacement of Expansion Bellow of FD/PA/ID Fan at Suction/Discharge side.

Replacement of fan side connecting coupling of any fan

Replacement of motor side connecting coupling of any fan

Replacement/Erection/Repairing of MS angle / Duct Support Pipe at inside the ducting.

PART-B-II-3): AIR PREHEATERS (from Sr. No. 4.11 to 4.17 below)

Repairing of steam/air lance of soot blower by welding

Replacement/Inspection of Gears/Input shaft/Output shaft/Gear box etc. including its servicing, if required of RAH Gear Box assembly. (It includes draining of lube oil, opening of Gear box covers, dismantlement of gears/shaft/oil seals/clutch assemblies/couplings, cleaning etc. & boxup of the same with new one/repaired after completion of work including filling of Lube oil etc. and running testing of the same.)

Water washing of APHs through washing system or Fire Fighting line.

Inspection, Re-setting/Replacement & alignment of Radial Seals of RAH-A&B (Hot End).

Inspection, Re-setting/ Replacement & alignment of Radial Seals of RAH-A&B (Cold End).

Inspection, Re-setting/ Replacement & alignment of Axial Seals of RAH-A&B (Hot & Cold End).

Inspection, Re-setting/ Replacement & alignment of Bypass Seals of RAH-A&B (Hot & Cold End).

PART-B-II-4): ELECTROSTATIC PRECIPITATOR (from Sr. No. 5.11 to 5.31 below)

Inspection/Checking of ESP field

Removal of snapped emitting electrodes.

Erection of new emitting electrodes

Repairing/replacement of shock bar, Repairing of guide bar

Replacement of shaft insulator

Replacement of plain fixed/free bearing

Replacement of split bush bearing

Re-positioning/removal/replacement of deflection plate.

Repairing of worn/damaged manhole to make it leak proof.

Attending leakages of ash by welding from inside of hopper including cleaning of surface of hopper for pointing out leakage, formation of temporary platforms if required etc.

Fabrication, repair & fitment of Flap assembly of Mechanical Ash Level Indicators of ESP hoppers.

Replacement of support insulator.

Straightening of bend / destroyed collecting electrodes.

Repairing/replacement of Outer arm of emitting and collecting system.

Alignment of emitting electrodes by using diagonal stay adjustment bolts

Alignment of emitting Rapping System (by using Pin Wheel Adjustment).

Replacement of shaft of collecting rapping system including removing of hammers from old shaft & fixing of hammers on new shaft.

Replacement of shaft of emitting rapping system including removing of hammers from old shaft & fixing of hammers on new shaft for one rapping mechanism.

Servicing of Emitting Gear Box / Collecting Rapping Gear Box including dismantlement of rapping gear box for checking of defective parts and their replacement, if any.

Replacement of Emitting / Collecting Rapping Gear Box with new one or Repaired Gear Box as per site requirement.

Water washing of ESP Fields.

PART-B-II-5): DUCT, GATES & DAMPERS (from Sr. No. 6.11 to 6.14 below)

Replacement/Repair of ducting of Flue Gas/Primary Air Duct/Secondary Air Duct etc. from inside using Patch work welding with MS Plate/Sheet as per required size according to the site requirement.

Repairing of ducting/Metallic Expansion joints of any LIP width of Flue Gas/Primary Air Duct/Secondary Air Duct etc. with welding (in running meter).

Replacement/Repair of fabric compensator of any width on Metallic Expansion joints of Flue Gas/Primary Air Duct/Secondary Air Duct etc. (in running meter).

Providing of scaffolding & platform in the outside the boiler area (height X length) with width of 2 nos. Jali (i.e. 2-3 feet approx. using more than 2-3 Jali). Note: All type of Scaffolding materials i.e. pipes, clamps, challies etc. is to be arranged by the contractor. Only metallic Challies/Jali/Channel Sheet will be used.

PART-B-II-6): DUCT, GATES & DAMPERS (from Sr. No. 7.11 to 7.19 below)

Fabrication & Erection of Misc. Steel structure/Platform, LP Pipelines etc. if scope of work under part-A exceeds beyond 2 MT in that particular month as per drawing & patch work and as per direction of EIC.

Deployment of below mentioned Technical team as per requirement for the miscellaneous jobs which are not covered above. A gang of Technician & Helper for attending any misc. Job for duration of 4 hours.

Deployment of below mentioned Technical team as per requirement for the miscellaneous jobs which are not covered above. A Technical team of Rigger etc. & Helper for attending any misc. Job for duration of 4 hours.

Deployment of below mentioned Technical team as per requirement for the miscellaneous jobs which are not covered. above. A Technical team of Painter & Helper for doing any misc. Painting job for duration of 4 hours.

Fabrication and installation of MS clamps up to 100 mm dia PIPE at site as per requirement. Any other associated work required to complete the work will be in the scope of firm to attended leakage of Low-pressure water line.

Fabrication and installation of MS clamps up to 101 to 500 mm dia PIPE at site as per requirement. Any other associated work required to complete the work will be in the scope of firm to attended leakage of Low-pressure water line.

Servicing/repairing/replacement of any type of Low-pressure cooling water system line valve / NRV more than dia of 150 mm but upto 200m size.

Attending the leakage in underground pipings of various systems in Boiler & its Auxiliaries Side area by welding/clamping up to a length of 2 meters as per detailed scope of work. i) To clean the affected area with the help of kassi etc. surrounding the leakage and to dig up the earth up to the depth of 2 to 2.5 meters from ground level and simultaneously dewatering the pit to expose the leaking point of the pipeline. ii) To attend to the leakage by welding/ clamping/replacing the damaged pipeline up to a length of 2 meters as per site requirement and direction of the Engineer- In charge. iii) Checking of the pipeline after attending to the leakage and charging with the media for leakage and satisfactory completion of the work. iv) Isolation/normalization of the pipeline as per site requirement. v) To backfill the earth pit with the removed soil and leveling the ground after attending to the leakage.

Attending the leakage in underground piping of various systems in Boiler & its Auxiliaries Side area by replacement of pipe line up to a length of upto 4 meters as per detailed scope of work. i) To clean the affected area with the help of kassi etc. surrounding the leakage and to dig up the earth up to the depth of 2 to 3 meters from ground level and simultaneously dewatering the pit to expose the leaking point of the pipeline. ii) To attend to the leakage by welding/ clamping/replacing the damaged pipeline up to a length of 4 meters as per site requirement and direction of the Engineer- In charge. iii) Checking of the pipeline after attending to the leakage and charging with the media for leakage and satisfactory completion of the work. iv) Isolation/normalization of the pipeline as per site requirement. v) To backfill the earth pit with the removed soil and leveling the ground after attending to the leakage.

RATES TO BE QUOTED FOR SECOND (2nd) YEAR:

PART-A: FIXED LUMPSUM RATES FOR SECOND (2nd) YEAR: Lump Sum Rate for fixed Main Scope of work under PART-A (i.e. work of Annual Maintenance Contract for Routine / Preventive / Breakdown maintenance of Boiler & its Auxiliaries (Pressure part, HP Valves, Rotary Machine, RAHs, ESP & Ducting etc. & Common Activities (as per scope of work mentioned at Annexure-IX of e-NIT documents)

PART-B: VARIABLE ITEM RATES FOR SECOND (2nd) YEAR: For Scope of work under PART-B (as per Annexure-X of e-NIT documents), (from Sr. No. 9.11 to 14.19 below)

PART-B-I): BOILER PRESSURE PART, BURNER, HP VALVES ETC. (from Sr. No. 9.11 to 9.53 below)

Mobilization & attending the boiler tube leakage / preventive mtc. of pressure parts tubes in Boiler area. It includes cutting, welding, fit-up, grinding and replacement of tube of all sizes and thickness involving upto 10 nos. HP joints. Note:- i) 03 Nos. Metal Built-ups each having half round surface by HP welder upto 100mm length will be considered as one joint and each window type joint will be considered as equivalent to 3 normal joints. ii) Through inspection for identification of failed tubes & inspection of adjoining area in vicinity of failed tube(s) will be in the scope of work of contractor. iii) To identify and attend the tubes found damaged & eroded tubes due to secondary damage. iv) A separate gang includes highly skilled IBR HP welder, grinder man, fitter, inspection team & technician etc. to be deployed by the contractor for attending Boiler tube leakage and inspection. Minor scaffolding (i.e. up to using 5 nos. metallic jalies only for height of 1 mtr. from base will be in scope of contractor & no separate payment will be made).

Carrying out HP joint in addition to 10 nos. joints mentioned in above point in boiler area. It includes cutting, welding, fit-up, grinding and welding of one no. joint of tube of all sizes and any thickness of boiler in area covered under above point.

Metal build up on worn out boiler tubes half round surface by HP welder upto 100 MM length.

Fin welding work on water wall / steam cooled wall tubes etc. by HP welder.

Attending leakage by welding of HP Joints at outside of the boiler including replacement of Boiler tube with thickness less than 5mm up to 1 Mtr. Length & Valves/Bends upto size of 4" Dia. by cutting, welding, grinding and fit-up work for each joint.

Replacement of new HP Valves of thickness more than 5mm using heat treatment process. NOTE: In case HP welder capable of doing the above work does not reach PTPS within 8 Hrs. of verbal/written/SMS instructions by EIC (i.e. AEE/AE Concerned) or higher authority & hence work could not be started or welder engaged is found incompetent then penalty of Rs. 5,000/- per day will be imposed on the contractor which will be in addition to other penalty clauses as applicable. Also, the work will be got carried out through outside agency at the risk & cost of the contractor and hence deducted from his running bill/s. It is pertinent to mention that above value of risk & cost will be over & above the penalty amount.

Repairing of inlet/outlet header of Economiser/LTSH/Steam Cooled Wall/Re-Heater/Super Heaters/Water Wall etc. i) Surface preparation of the eroded / cavity / eated away portion by gauging followed by grinding of above Boiler header so as to fill/repairing the same by welding method as per site requirement. ii) Edge preparation of eroded portion of Boiler header by grinding to make the space for filling the weld material so as to repair as per site requirement. iii) Preheating of the damaged portion is to be carried before doing welding on the eroded potion of the header as per the designated welding & heat treatment procedure as per IBR regulations. iv) Pre-heating of prepared grinded portion of such header to 150 degree before doing the welding on the same. v) Eroded portion of header is to be repaired by applying the 1st root of TIG welding followed by pre heating as explained above. vi) Repairing of damaged & grinded portion of Boiler header and shall be welded with compatible welding electrodes matching with specification of parent material of header followed by pre heating as explained above after every root. vii) On cooling of each root, the DP test is to be carried out for detection of any cracks/holes. viii) Any other work to complete the job as per site requirement will be in the scope of contractor.

Mobilization and De-mobilization Charges along with their all T&P for carrying out the Stress Relieving treatment of repaired headers of Boiler area as per IBR regulation. Any other work to complete the job as per site requirement will be in the scope of contractor.

Service Charges towards deputing for carrying out the Stress Relieving treatment of repaired headers of Boiler area as per IBR regulation. It includes proper Post weld heat treatment as per standard procedure of IBR i.e. upto 610 degree Celsius for 05 hours after completion of welding shall be covered suitably by ceramic insulation to maintain controlled cooling upto atmospheric temperature to remove the internal stresses. Any other work to complete the job as per site requirement will be in the scope of contractor.

Stress Relieving treatment of HP Joints of size upto 2.5 inch

Stress Relieving treatment of HP Joints of size 2.5 to 5 inch

Inspection and Thickness measurement of pressure part tubes in erosion prone area by De-metering.

DP Test of Stub Joints

DP Test of DMW Joints of tubes.

Complete servicing of HP valve spare including lapping of seat /disc dismantlement & re-erection / refitting, replacement of spares. (Valves Gate/ Globe / NRV / Steam traps Seats etc. up to 150mm).

Replacements of gasket of man hole of boiler drum including minor repair/grinding, if any

Repair, rectification & re-fixing of cassette baffles/Replacement of cassette baffles on various boiler tubes

Providing / Re-positioning of twisted/dislocated protective shields/Replacement of shielding plates/shrouds plated on various boiler

Casting refractory on Boiler & its auxiliaries.

Providing skin casing with MS plate

Providing buck stay pin / repairing of buck stay.

Erection of Scaffolding & Platform at Platen SH, Re-heater, Final SH, Screen Tube, LTSH etc. in addition to the work covered in part-A. Dismantlement of the same after completion of the mtc. works. (Upto 05 Meter, Erection time will be 10 Hrs. & Dismantlement time will be 5 hrs.) (Upto 10 Meter, Erection time will be 15 Hrs. & Dismantlement time will be 8 hrs.) Note: All type of Scaffolding materials i.e. pipes, clamps, challies etc. is to be arranged by the contractor. Only metallic Challies/Jali/Channel Sheet must be used.

Erection of Scaffolding & Platform at 01 Corner inside at any area of boiler & its auxiliaries except Platen Super Heater & Re-heater in addition to the work covered in part-A. Dismantlement of the same after completion of the mtc. works. (Erection time will be 16 Hrs. & Dismantlement time will be 10 hrs.) Note: All type of Scaffolding materials i.e. pipes, clamps, challies etc. is to be arranged by the contractor. Only metallic Challies/Jali/Channel Sheet must be used.

Pulling of Pressure part Coil/Panels: i) Pulling apart neighboring coils of LTSH/Re-heater/FSH of leaking coils to create the accessibility for attending/welding of the damaged coils. ii) The contractor will also help in attending job by doing grinding & cutting of the damaged coils and cleaning work as required for doing the above job. iii) Restoring the above coils to their original position after completion of work mention as above a). iv) Completion Period: 03 Hrs. for a) & 5 hrs. for iii).

Erection of Scaffolding & Platform between 02 Corners inside at any area of boiler except Platen Super Heater & Re-heater in addition to the work covered in part-A. Dismantlement of the same after completion of the mtc. works. (Erection time will be 20 Hrs. & Dismantlement time will be 12 hrs.) Note: All type of Scaffolding materials i.e. pipes, clamps, challies etc. is to be arranged by the contractor. Only metallic Challies/Jali/Channel Sheet will be used.

Sealing of Bottom Ash Hopper at S-panel area at 8 meter elevation. (Erection time will be 48 Hrs. & Dismantlement time will be 24 hrs.) Note: All type of Scaffolding materials i.e. pipes, clamps, challies etc. is to be arranged by the contractor. Only metallic Challies/Jali/Channel Sheet will be used.

Internal water washing of Re-heater/Goose neck area/Final Super Heater Zone/Screen Tubes etc. for attending the tube leakage in zone of Re-heaters/Platen Super Heater/Final Super Heater/Extended SCW/Extended Water wall/Spacer Tube & Top Radiant/Ceiling roof etc.

Complete Internal water washing of 2nd pass area of boiler including Re-heater/Goose neck area/Final Super Heater Zone/Screen Tubes/Platen Super Heater/both RAHs/Economiser Hoppers/RAH & Ducts hoppers etc.

Complete External water washing of boiler from boiler top to zero meter elevation.

Checking of Burner Tilt Mechanism and rectification thereof at one corner. i) Disconnections of all reach rods from burner tilt mechanism as per requirement. ii) Dismantling of burner tilt mechanism including removal of drive shaft after disconnecting from burner tilt power cylinder. iii) Removal of burner tilt power cylinder from its position if required by C&I mtc. and refitting of same & replacement of burner tilt shear pin/ other pins, if found damaged. iv) Lubrication of pins, shafts, studs of reach rod etc. as per requirement. v) Repair/ replacement of reach rod turn buckle, pivot pins, pins of tilting mechanism as per requirement. vi) Assembly & refitting of burner tilt mechanism. Connections of all reach rods to burner tilt mechanism and zero setting of all nozzle tips. vii) Tilting trail of burner tilt. Ensure free operation of burner tilt upto +/- 30 degree connecting with power cylinder and trail operation power cylinder.

Rectification of jammed secondary air damper from inside wind box. i) Cleaning and removing of all the ash accumulated in SADC partition plate in all the four corners and cleaning shafts and bush with diesel/ restoline etc. as per requirement. ii) Repair/ replacement of damper flaps, bush, glands, links and partition plate of damper compartment as per requirement. iii) Making damper operation free & smooth. iv) Providing damper movement indicators over the shaft as per requirement. v) Repairing secondary air damper lever & its connection with damper power cylinder if required. vi) Removal of bush of drive end & non drive end along with bush housing in case of jamming of SADC, if required & refitting of same after repairing or replacement by new. vii) Repairing and replacement of stopper. NOTE: Scaffolding if required for above work will be paid extra as per unit rate.

Rectification of jammed secondary air damper from outside wind box.

Repairing/Servicing/Replacement of scanner guide assembly including its removal from panel, repair/replacement of worn-out parts if required and checking its movement with tilting mechanism.

Repairing/Servicing/Replacement of Igniter guide assembly including its removal from panel, repair/replacement of worn-out parts if required and checking its movement with tilting mechanism.

Opening/closing of oil gun/coal nozzle/air side chamber/Burner plate for inspection

Removal, refitting & servicing of burner isolating gate with replacement of gaskets etc. at furnace end. In case work is not started within reasonable time after verbal/ written/ SMS instructions by EIC (i.e. AEE/AE concerned) or higher authority or manpower engaged is found incompetent then penalty of Rs. 5,000/- per day will be imposed on the contractor which will be in addition to other penalty clauses as applicable. Also work will be got carried out through outside agency within the notice period of 12 hours at the risk and cost of other agency of the contractor and hence deducted from his running bills. It is pertinent to mention that above value of risk will be over and above the penalty amount. NOTE: All the associated works such as removal/ locking of fuel inlet elbow, removal of Victaulic coupling etc. Required for completion of above job is included in scope of work.

Repairing of boiler seal trough dipping plate which includes lifting/lowering/bolting etc as per requirement.

Repair/replacement of tie rod of any hanger in boiler area.

Replacement of SS wire mesh in seal trough area

Complete servicing of wall soot blower. i) Opening of top cover of wall blower. ii) Decoupling of gear box. iii) Replacement of damaged parts/spare like changing glands / gaskets, parts etc. if any. iv) Servicing / repairing / assembling after checking / inspection / replacement of damaged parts to make free movement of wall blower shaft and gear. v) Re-assembling of gear box. vi) Fitting of top cover. vii) Top up of oil in to gear box. Trail run of soot wall blower. viii) Any other job required to complete the above activity is included in the scope of work.

Servicing/Replacement/Rectification of LDO Pump/Cartridge/Mechanical seal

Servicing of Boiler safety valve including replacement of disc, spindle & other spare parts as per requirement

Lifting and lowering & re-fixing of economizer module / LTSH module for maintenance purpose (excluding any HP joints).

PART-B-II) Boiler Rotary Parts i.e. Fans, APHs, ESP & Ducting etc. (from Sr. No. 10.11 to 14.19 below)

1) ID / FD / PA /Seal Air / Scanner Air Fans & Seal air blowers (from Sr. No. 10.11 to 10.24 below)

De-coupling of ID / FD / PA Fan with its motor & Coupling of the same after alignment/maintenance works.

Replacement of blade pitch control system (i.e. Hydraulic Cylinder) of FD Fan

Opening of top casing of FD Fans including Removal/Replacement of Fabric Expansion joint of casing for inspection or other related works & Re-fixing of the same after completion of the work.

Attending oil leakage of bearing housing of FD Fans from oil connecting lines.

Replacement / Servicing of Main bearing assembly. (It excludes the works already covered under all above points i.e. 10.13 & 10.14 but It includes the complete dismantlement of Main bearing assembly from the FD Fan Housing, Shifting of the same to DG set house of Unit-5&6 for their through inspection / servicing / replacement of the damaged spares and fitting back to their original position into the FD fan.)

Replacement of Servo motor assembly / Blade bearing assembly of FD Fans. (It excludes the works already covered under all above points i.e. 10.13, 10.14 & 10.15 but It includes the dismantlement of Servo motor assembly / Blade bearing assembly from the FD Fan Housing, Shifting of the same to DG set house of Unit-5&6 for their through inspection, if required and replacement / fitting back to their original position into the FD fan with new one or repaired assembly.)

Replacement of FD Fan Complete Blade set of Blade Bearing Assembly. It excludes the works already covered under all above points i.e. 10.13 & 10.16 but It includes the followings: i) Removal of the damaged blades, by opening the Allen bolts along with all the parts i.e. sealing rings, o-ring baskets, bush etc. ii) Internal cleaning of all parts. iii) Installation / replacement / fitting back the new blades along with all requisite accessories i.e. sealing rings, o-ring baskets, bush etc. to their original position with new one or refurbished. iv) Physical inspection of blades & its movement. v) Tightening of foundation bolts etc. of the fan. vi) Checking of connections of servo motors and locking the nuts by its tightening. vii) Repairing of casing as per site requirement. viii) Checking of clearance of fan blades with casing and grinding the same, if required as per site requirement. ix) Checking the alignment of fan rotor with motor and re-alignment of fan & motor, if required. x) Balancing of fan, if required as per site requirement with the help of service engineer which will be arranged by HPGCL at its own cost. xi) Fixing of coupling guard between fan and intermediate shaft. xii) Engagement of actuator with hydraulic impeller blade adjustment system. xiii) Setting of opening & closing of blade pitch from 0 to 100%. xiv) Trail run of PA fan for smooth operation and assisting in checking of vibration of the fan. xv) Any other work to compete the job shall be included in the scope of work of contractor.

Removal of impeller of scanner air fan from motor shaft and its refitting.

Replacement of the scanner air fans/air blowers of ID Fans with new one/repaired

Attending cooler tube leakage of lube oil system of FD fans.

Repair/replacement of Expansion Bellow of FD/PA/ID Fan at Suction/Discharge side.

Replacement of fan side connecting coupling of any fan

Replacement of motor side connecting coupling of any fan

Replacement/Erection/Repairing of MS angle / Duct Support Pipe at inside the ducting.

PART-B-II-3): AIR PREHEATERS (from Sr. No. 11.11 to 11.17 below)

Repairing of steam/air lance of soot blower by welding

Replacement/Inspection of Gears/Input shaft/Output shaft/Gear box etc. including its servicing, if required of RAH Gear Box assembly. (It includes draining of lube oil, opening of Gear box covers, dismantlement of gears/shaft/oil seals/clutch assemblies/couplings, cleaning etc. & boxup of the same with new one/repaired after completion of work including filling of Lube oil etc. and running testing of the same.)

Water washing of APHs through washing system or Fire Fighting line.

Inspection, Re-setting/Replacement & alignment of Radial Seals of RAH-A&B (Hot End).

Inspection, Re-setting/ Replacement & alignment of Radial Seals of RAH-A&B (Cold End).

Inspection, Re-setting/ Replacement & alignment of Axial Seals of RAH-A&B (Hot & Cold End).

Inspection, Re-setting/ Replacement & alignment of Bypass Seals of RAH-A&B (Hot & Cold End).

PART-B-II-4): ELECTROSTATIC PRECIPITATOR (from Sr. No. 12.11 to 12.31 below)

Inspection/Checking of ESP field

Removal of snapped emitting electrodes.

Erection of new emitting electrodes

Repairing/replacement of shock bar, Repairing of guide bar

Replacement of shaft insulator

Replacement of plain fixed/free bearing

Replacement of split bush bearing

Re-positioning/removal/replacement of deflection plate.

Repairing of worn/damaged manhole to make it leak proof.

Attending leakages of ash by welding from inside of hopper including cleaning of surface of hopper for pointing out leakage, formation of temporary platforms if required etc.

Fabrication, repair & fitment of Flap assembly of Mechanical Ash Level Indicators of ESP hoppers.

Replacement of support insulator.

Straightening of bend / destroyed collecting electrodes.

Repairing/replacement of Outer arm of emitting and collecting system.

Alignment of emitting electrodes by using diagonal stay adjustment bolts

Alignment of emitting Rapping System (by using Pin Wheel Adjustment).

Replacement of shaft of collecting rapping system including removing of hammers from old shaft & fixing of hammers on new shaft.

Replacement of shaft of emitting rapping system including removing of hammers from old shaft & fixing of hammers on new shaft for one rapping mechanism.

Servicing of Emitting Gear Box / Collecting Rapping Gear Box including dismantlement of rapping gear box for checking of defective parts and their replacement, if any.

Replacement of Emitting / Collecting Rapping Gear Box with new one or Repaired Gear Box as per site requirement.

Water washing of ESP Fields.

PART-B-II-5): DUCT, GATES & DAMPERS (from Sr. No. 13.11 to 13.14 below)

Replacement/Repair of ducting of Flue Gas/Primary Air Duct/Secondary Air Duct etc. from inside using Patch work welding with MS Plate/Sheet as per required size according to the site requirement.

Repairing of ducting/Metallic Expansion joints of any LIP width of Flue Gas/Primary Air Duct/Secondary Air Duct etc. with welding (in running meter).

Replacement/Repair of fabric compensator of any width on Metallic Expansion joints of Flue Gas/Primary Air Duct/Secondary Air Duct etc. (in running meter).

Providing of scaffolding & platform in the outside the boiler area (height X length) with width of 2 nos. Jali (i.e. 2-3 feet approx. using more than 2-3 Jali). Note: All type of Scaffolding materials i.e. pipes, clamps, challies etc. is to be arranged by the contractor. Only metallic Challies/Jali/Channel Sheet will be used.

PART-B-II-6): DUCT, GATES & DAMPERS (from Sr. No. 14.11 to 14.19 below)

Fabrication & Erection of Misc. Steel structure/Platform, LP Pipelines etc. if scope of work under part-A exceeds beyond 2 MT in that particular month as per drawing & patch work and as per direction of EIC.

Deployment of below mentioned Technical team as per requirement for the miscellaneous jobs which are not covered above. A gang of Technician & Helper for attending any misc. Job for duration of 4 hours.

Deployment of below mentioned Technical team as per requirement for the miscellaneous jobs which are not covered above. A Technical team of Rigger etc. & Helper for attending any misc. Job for duration of 4 hours.

Deployment of below mentioned Technical team as per requirement for the miscellaneous jobs which are not covered. above. A Technical team of Painter & Helper for doing any misc. Painting job for duration of 4 hours.

Fabrication and installation of MS clamps up to 100 mm dia PIPE at site as per requirement. Any other associated work required to complete the work will be in the scope of firm to attended leakage of Low-pressure water line.

Fabrication and installation of MS clamps up to 101 to 500 mm dia PIPE at site as per requirement. Any other associated work required to complete the work will be in the scope of firm to attended leakage of Low-pressure water line.

Servicing/repairing/replacement of any type of Low-pressure cooling water system line valve / NRV more than dia of 150 mm but upto 200m size.

Attending the leakage in underground pipings of various systems in Boiler & its Auxiliaries Side area by welding/clamping up to a length of 2 meters as per detailed scope of work. i) To clean the affected area with the help of kassi etc. surrounding the leakage and to dig up the earth up to the depth of 2 to 2.5 meters from ground level and simultaneously dewatering the pit to expose the leaking point of the pipeline. ii) To attend to the leakage by welding/ clamping/replacing the damaged pipeline up to a length of 2 meters as per site requirement and direction of the Engineer- In charge. iii) Checking of the pipeline after attending to the leakage and charging with the media for leakage and satisfactory completion of the work. iv) Isolation/normalization of the pipeline as per site requirement. v) To backfill the earth pit with the removed soil and leveling the ground after attending to the leakage.

Attending the leakage in underground piping of various systems in Boiler & its Auxiliaries Side area by replacement of pipe line up to a length of upto 4 meters as per detailed scope of work. i) To clean the affected area with the help of kassi etc. surrounding the leakage and to dig up the earth up to the depth of 2 to 3 meters from ground level and simultaneously dewatering the pit to expose the leaking point of the pipeline. ii) To attend to the leakage by welding/ clamping/replacing the damaged pipeline up to a length of 4 meters as per site requirement and direction of the Engineer- In charge. iii) Checking of the pipeline after attending to the leakage and charging with the media for leakage and satisfactory completion of the work. iv) Isolation/normalization of the pipeline as per site requirement. v) To backfill the earth pit with the removed soil and leveling the ground after attending to the leakage.

CHANDA CONSTRUCTION CO. (BID ID -1179901)

M/s Power Tech Engineering Co. (BID ID -1180268)