Tender For Service Contract For Overhauling Job Of U 3 Esp 500Mw Bhel Make 04 Passes 72 Nos Esp Fields Under Ahp Em Stg Ii At Sgtpp- 1 U#3 ESP OVERHAULING JOB: 2 Dry cleaning work.Dry cleaning of ESP starting from ESP inlet funnel to ESP outlet funnel , all ESP hoppers, Gas distribution Screens, all emitting electrodes and collecting plates and other allied zones. Suspension zone in between CERM/EERM Frame and ESP ceiling to be checked and cleaned properly. After de-synchronization of Unit, all hopper doors (288 Nos.) are to be opened for smooth removal of ash and after completion of total overhauling job, all hopper manholes has to be boxed up by replacement of new gasket replacement (100%).Stipulated Period of Work: Day-2 to Day-4- 04 Number ofseparate manpower gangs to be engaged for working at a time in 04 ESP Passes. Report to be submitted to department by 4th day evening or 5th day morning. 3 Water Jet Cleaning work.HP Water Jet washing of ESP internals (72 nos Fields), including all hoppers, collecting plates, emitting electrodes and other allied zones. At the time of water washing if any chocking found in the hoppers, the choking shall be cleared immediately. All arrangements including hose and booster pump having discharge pressure of 4-5 Kg/sq.cm for the job will be in partys scope. Suspension zone in between CERM/EERM Frame and ESP ceiling to be checked and cleaned properly. Stipulated Period of Work:Day-3 to Day-9 - 02 separate groups of manpower should beworking at a time round the clock strictly to finish withinstipulated time. Each day Job progress and simultaneous checking report to be submitted within 48 Hrs of Unit De-sync andsimultaneous information to party sufficient number HP Hose and 04 number HP Pumps must be available at site for working at a time from 04 different Water outlet points 4 Internal checking & rectification work.Field gauging of each Collecting Plate to maintain a gap of 400 mm by Go Gauge (72 nos of ESP fields in A, B, C & DPath).Job to be carried out by specialized separate manpower ,experienced to perform identical job at ESP. Re-fitting of newspacers if required. Stipulated Period of Work: Day -6 to Day-20.Each day finding report and simultaneous rectification report to be submitted. Rectification job to be strictly carried out as perreports/findings of expert engaged by departmental authority 5 CERM system.Checking and rectification of Collecting rapping system of all theESP fields thoroughly. Replacement/Fitting of missing components/ Repair & Alignment of rapping shafts, bearings, Pin wheel,hammer assembly of all the rapping mechanism, if required afterchecking for ESP Fields .Rectification/Replacement of shock Pad,Anvil Bar and corresponding fasteners, Shock Bar Guide Plate,Guide angle, PL attachments of Rapping and non-rapping sides.Stipulated period of Work: Day -6 to Day-20 - The teams areseparate than the manpower engaged in field gauging job. Eachday finding report and simultaneous rectification report to besubmitted. Rectification job to be strictly carried out as perreports/findings of expert engaged by departmental authority. 6 EERM System.Checking and rectification of Emitting rapping system of all theESP fields thoroughly. Replacement /Fitting of missingcomponents/ Repair & Alignment of rapping shafts, bearings, Pinwheel, thrust pad, bottom bearing, hammer assembly of all therapping mechanism, if required after checking for ESP Fields. Stipulated Period of Work: Day -6 to Day-20 -Simultaneous workto go on in 02 passes at a time by two separate expert team.These teams are separate than the manpower engaged infieldgauging job. Each day finding report and simultaneous rectificationreport to be submitted. Rectification job to be strictly carried outas per reports/findings of expert engaged by departmentalauthority. 7 GDRM System.Checking and rectification of GD Screen rapping systemthoroughly. Replacement / Repair & Alignment of rapping shafts,bearings, hammer assembly of all the rapping mechanism, ifrequired after checking. Stipulated Period of Work: Day -10 toDay-16 Each day finding report and simultaneous rectificationreport to be submitted. Rectification job to be strictly carried outas per reports/findings of expert engaged by departmentalauthority. 8 Shaft insulator system.Replacement / Repair & Cleaning of Shaft Insulator and itsHeater. Proper box up after the job with gasket replacement iffound damaged. Cleaning of shaft insulators to be done in 02phases(after water washing and again before final box up bypetrol). Stipulated Period of Work: Day -8 to Day-18 - Thoroughcleaning by petrol washing to ensure full dryness. Separate groupof electrician is to be engaged for heater checking Each dayfinding report and simultaneous rectification report to be submitted.Rectification job to be strictly carried out as per reports/findingsof expert engaged by departmental authority. 9 Support Insulator system.Cleaning of Support Insulator and its Heater. Proper box up afterthe job with gasket replacement if found damaged. Cleaning of support insulators to be done in 02 phases(after water washing andagain before final box up by petrol). Stipulated Period of Work:Day -8 to Day-18 - Thorough cleaning by petrol washing toensure full dryness. Separate group of electrician is to be engaged.Each day finding report and simultaneous rectification report to besubmitted. Rectification job to be strictly carried out as perreports/findings of expert engaged by departmental authority. 10 Hopper Heater.Hopper heater replacement / Repair & Cleaning of Hopper Heater.Checking and repairing of heater jackets for any ash accumulationand damage followed by repairing of the same. Stipulated Periodof Work: Day-10 to Day-20. Same electrician group to beengaged as for Support & Shaft insulators. Each day findingreport and simultaneous rectification report to be submitted.Rectification job to be strictly carried out as per reports/findingsof expert engaged by departmental authority 11 Guide vane. (ESP INLET FUNNEL)Checking , Repair/Replacement and strengthening of Guide Vaneof ESP Inlet Duct. A separate/dedicated group of manpower to beengaged for the job apart from the groups working inside theESP. Each day finding report and simultaneous rectification reportto be submitted. Rectification job to be strictly carried out as perreports/findings of expert engaged by departmental authority. 12 CERM,EERM & GDRM Gearboxes.CERM,EERM & GDRM Gear Boxes. Lubrication of Collectingand Emitting rapping motor and its gearbox. Each day findingreport and simultaneous rectification report to be submitted.Rectification job to be strictly carried out as per reports/findingsof expert engaged by departmental authority. 13 Insulation Testing of ESP Fields.Insulation Testing of ESP Fields. After completion of aforesaidjobs, Meggaring of each field to be carried out until it comes toits desired value. Stipulated period of Work: From Day-22 to tilldesired result is achieved 14 ESP TR sets.The entire Transformer # Rectifier units should be checkedthoroughly and cleaned body only including checking of oil leveland changing of silica gel depending upon the condition then.Each day finding report and simultaneous rectification report to besubmitted. Rectification job to be strictly carried out as perreports/findings of expert engaged by departmental authority. 15 HV Safety Breakers/Disconnecting SwitcheAlignments of all the safety breakers, 72 Nos. (1 for each field)should be checked & rectified. These must also be cleaned. AllPin Insulators (216 Nos) along with copper tubes to be checkedcleaned and if required replaced. All Disconnecting switch boxesdoor rubber gasket replacement is mandatory and to be suppliedby SgTPP authority. Through cleaning by petrol wash to ensurefull dryness. Each day finding report and simultaneous rectificationreport to be submitted. Rectification job to be strictly carried outas per reports/findings of expert engaged by departmentalauthority 16 ESP MCC panels.All the MCC panels (LTMSB-A,B,C & D) of ESP fields & itsACP (A,B,C & D) Panels, HD & TB Panels also the EC Panels(72 nos), including 11 KV/ 415V Dry type Transformers (08Nos.) to be cleaned & tightness checked. Strictly electrician grouphaving adequate knowledge of electrical switchgear system to beengaged for the job. Report to be furnished with megger value 17 ESP manhole doors.Inspection and repair of all manhole Doors of A-path, B-path,C-path & D-path by replacement of Door sealing gasket for 100%doors. Stipulated Period of Time: Subject to completion of abovementioned jobs. 18 Painting workPainting of all outdoor equipments of ESP.(Gear Boxes, Doors,Disconnecting Switch Boxes, Shaft & Support Heater enclosures).Surface preparation by manual cleaning, de-rusting by Sand paperetc, then applying one coat of Bison H/B zinc phosphate primer+ two coats of synthetic enamel finish paint (Make-Berger paints).The job has to be completed as directed by concerneddepartmental representative. 19 Repairing of Gas Distribution Screen.Repairing of Gas Distribution Screen based on report afterchecking. Repairing / Replacement to be done by necessaryscaffolding which is under the Scope of Party. Inspection andpatch repair of gas distribution box nozzles at the inlet funnel ofESP. Fabrication and replacement of nozzles of gas distributionbox is limited to 20 Nos. Stipulated period of Work: Within Day21. Each day finding report and simultaneous rectification reportto be submitted. Rectification job to be strictly carried out as perreports/findings of expert engaged by departmental authority. 20 Checking & Calibration of ALIChecking and calibration of all Ash Level Indicators (ALI) are tobe done. If required, ALI to be replaced (total # 144 nos.).Alongwith RF type probe checking and replacement if required. 21 Any type of fabrication jobTo set right the ESP internal and leakage rectification of ESPRoof Top and ESP Wall to resist water and air ingress in ESP ifrequired, are also within the scope of the party. Each day finding report and simultaneous rectification report to be submitted.Rectification job to be strictly carried out as per reports/findingsof expert engaged by departmental authority 22 ESP Hopper Repairing JobIf any damage to hopper body/door, internal found for all 144number ESP Hoppers, required rectification to be done. 23 Replacement of shock barReplacement of 25 Nos. shock bar along with scaffolding work,dismantling & erection of shock bar, ESP Field gauging, checking& alignment of C13 Field at ESP, U#3. If required, the shockbar guide of rapping side & non rapping sides has to replaced. 24 Replacement of Support Insulator,Repairing and strengthening of Support Insulator Housing.
