Maintenance Work of Mills, CMR system and Coal Pipes of 250 MW, DTPS, HTPS, Kasimpur, Aligarh

Amount

Round the clock routine and preventive maintenance of Bowl mills & RC-feeders of Unit No:-8 (03shift X 730 days =2190)

Round the clock routine and preventive maintenance of Bowl mills & RC-feeders of Unit No:-9 (03shift X 730 days =2190)

Round the clock operation PLC Auto/Manual from mill site and compressors for coal mill reject system and routine/preventive break-down maintenance of pneumatic coal mill reject handling system & compressor with air receiver tank and air pipe lines etc along with the house keeping of reject system and nearby area of Unit No:-8 & 9( (03shift X 730 days =2190)

Break-down Maintenance works of Bowl mills (XRP- 903) of Unit no-8 or 9 of 2X250 MW, DTPS, HTPS, Kasimpur, Aligarh.

Replacement of Roller Journal assembly(One RJ assembly makes one job) ( Time of Job completion = 08 Hrs.)

Changing trunnion position of RJ assembly. (One trunnion of one mill makes one Job) ( Time of Job completion = 04 Hrs.)

Replacement of worn out grinding roll with new/healthy one, including servicing of RJ assembly.(Time of Job completion = 24 Hrs.)

Overhauling of pressure spring assembly (One spring assembly of any mill shall be considered as one quantity.)( Time of completion = 08 Hrs.)

Servicing/ repairing of spring support cover by machining/ tapping etc.(Time of completion = 08 Hrs.)

Replacement / Servicing of journal stop bolt..(Time of completion = 04 Hrs.)

Attending dust leakage from Journal opening cover. .(Time of completion = 04 Hrs.)

Replacement of bull ring segment assembly when replacement of RJ assembly has been given as separate job ( Separate job for removing and fixing of all three RJ assembly shall be given).(Time of completion = 16 Hrs.)

Replacement of bull ring segment assembly while at least one RJ assembly is inside the bowl mill.(Time of completion = 24 Hrs.)

Refitting of dislocated clamping ring/bull ring segment when replacement of RJ assembly has been given as separate job( Separate job for removing and fixing of all three RJ assembly shall be given).(Time of completion = 16 Hrs.)

Refitting of dislocated clamping ring/bull ring segment while at-least one RJ assembly is inside the bowl mill.(Time of completion = 24 Hrs.)

Replacement of airport ring assembly, when replacement of RJ assembly has been given as separate Job. Complete one set (one set consist of 06 pieces).(Time of completion = 48 Hrs.)

Repairing of airport ring assembly in installed condition when replacement of RJ assembly has been given as separate job (Separate Job for removing and fixing of all three RJ assembly shall be given).(Time of completion = 12 Hrs.)

Repairing of airport ring assembly in installed condition while at-least one RJ assembly is inside the bowl mill.(Time of completion = 12 Hrs.)

Repairing/Replacement of bowl extension ring segment, when replacement of RJ assembly has been given as a separate Job.(Time of completion = 12 Hrs.)

Repairing/Replacement of venturi, while replacement of MPO & MDV are awarded as separate Job.(Time of completion = 12 Hrs.)

Repairing/Replacement of venturi, while MPO & MDV are in their installed condition.(Time of completion = 24 Hrs.)

Repairing of venturi outlet in installed condition.(Time of completion = 08 Hrs.)

Replacement of MPO.(Time of completion = 48 Hrs.)

Replacement of MDV.(Time of completion = 24 Hrs.)

Replacement of (leaking) Victaulic coupling rubber gasket of MPO/ MDV/ transition piece.(Time of completion = 04 Hrs.)

Replacement of classifier inner cone, when replacements of RJ assemblies have been given as separate Jobs.(Time of completion = 48 Hrs.)

Fabrication and fixing of air duct vanes.(Time of completion = 08 Hrs.)

Repairing of 'O' collar assembly.(Time of completion = 06 Hrs.)

Repairing eroded portion of classifier inner cone.(Time of completion = 04 Hrs.)

Replacement/refitting/Servicing of classifier blade.(Time of completion = 04 Hrs.)

Adjustment of classifier blade operating linkage mechanism.(Time of completion = 08 Hrs.)

Replacement /Repairing of scrapper guard assembly.(Time of completion = 04 Hrs.)

Replacement of mill side liner, when replacement of RJ assembly has been given as a separate Job.(Time of completion = 24 Hrs.)

Repairing of Mill side liners by patching/welding (MS plate of thickness-10/12 mm for patching may be arranged from scrap).(Time of completion = 04 Hrs.)

Repairing/Replacement of mill side bottom liner.(Time of completion = 04 Hrs.)

Replacement of bottom insulation cover plate (complete set).(Time of completion = 24 Hrs.)

Repairing of bottom insulation cover plate.(Time of completion = 12 Hrs.)

Checking and inspection / Replacement of Labyrinth seal inside the mill liner body of mill.(Time of completion = 12 Hrs.)

Checking and inspection / Replacement of Labyrinth seal outside the mill liner body of mill.(Time of completion = 12 Hrs.)

Refitting/replacement of dislocated lower/upper skirt assembly.(Time of completion = 24 Hrs.)

Decoupling, performing alignment of mill-motor complete coupling and final coupling.(Time of completion = 12 Hrs.)

Replacement of damaged geared coupling of input shaft and distance piece with new-one (Healthy-one) and perform alignment.(Time of completion = 24 Hrs.)

Repairing of separator body, when replacement of RJ assemblies have been given as separate Jobs.(Time of completion = 24 Hrs.)

Replacement of bowl hub cover, when replacement of RJ assemblies has been given as separate Job.(Time of completion = 08 Hrs.)

Making threaded hole of any diameter on any surface of bowl mill by drilling and tapping.(Time of completion = 12 Hrs.)

Servicing of oil coolers of mills in installed condition (one cooler of one mill make one Job).(Time of completion = 24 Hrs.)

Replacement/Refitting of braided hose of lube oil pipe line.(Time of completion = 04 Hrs.)

Servicing of seal air valve on seal air header of mills.(Time of completion = 06 Hrs.)

Hard facing of bowl mill spares by 2" chequering pattern using sequence welding technique in installed condition.(Time of completion = 08 Hrs.)

Complete dense hard facing of cap of airport ring assembly & Bowl extension ring with hard facing electrode.(Time of completion = 04 Hrs.)

Fabrication and Replacement of RCF Hopper chute to center pipe of mill.(Time of completion =24 Hrs.)

Fabrication & Fitting of Guard/covering/shroud of RJ assembly housing by 8/10/ 12mm thick MS/Sailma plate.(Time of completion = 12 Hrs.)

Complete Overhauling of RJ assembly.(Time of completion = 16 Hrs.)

Servicing of Hot air gate.(Time of completion = 10 Hrs.)

Servicing of Hot air damper.(Time of completion = 10 Hrs.)

Servicing of Cold air gate.(Time of completion = 08 Hrs.)

Servicing of Cold air damper.(Time of completion = 08 Hrs.)

Attending coal/coal dust leakage from centre feed pipe/coal pipe {one patch (min size-200X200mm) make one Job)}.(Time of completion = 04 Hrs.)

Servicing of lube oil system of mills (one mill make one Job).(Time of completion = 16 Hrs.)

Servicing of oil coolers of mill lub. oil system by taking out the cooler from the lube oil system. (One cooler of one mill make one Job).(Time of completion = 48 Hrs.)

Servicing of lube oil pump of Bowl mills.(Time of completion = 08 Hrs.)

Replacement of lube oil pump of bowl mill with new /overhauled/serviced pump.(Time of completion = 04 Hrs.)

Metalizing & hard facing of clamping rings of bull ring segment (All 4 rings make one job). Metalizing welding electrode is in firm scope. Hard facing to be done with L&T 670/700 welding electrode which shall be provided by Nigam.(Time of completion = 24 Hrs.)

Repairing / Welding work in Cold air Duct/ Hot air duct.(Time of completion = 06 Hrs.)

Changing worn out coal pipe (full length or piece) / bend with new one (One pipe/bend make one Job).(Time of completion = 24 Hrs.)

Changing of worn out /damaged centre feed pipe of milling system.(Time of completion = 24 Hrs.)

Cleaning, Greasing, Servicing of electrically operated hoist (One job of one unit for fifteen days).(Time of completion = 16 Hrs.)

Servicing of all electrically operated hoist of mill site.(one unit make one job of 7+ 1 under hung crane + hoist ).(Time of completion = 40 Hrs.)

Taking out one no. complete RJ assembly from any bowl mill while taking-out journal opening cover.(Time of completion = 08 Hrs.)

Fixing of one no RJ assembly in any bowl mill when Journal opening cover is already opened.(Time of completion = 08 Hrs.)

Checking and inspection/Replacement of (If found damaged) bearings with new one of input shaft of planetary Gearbox of Bowl Mill.(Time of completion = 48 Hrs.)

Replacement of broken bolt of mill body to separator top and bottom liner.(Time of completion = 24 Hrs.)

Shifting of healthy RJ assembly from mill floor (3.5 mtr.) of unit no:- 8 to unit no:- 9 mill floor ( 3.5 mtr.) and vice versa.(Time of completion = 04 Hrs.)

Repairing and reconditioning of eroded portion of bowl (erosion due to worn-out of bull ring segment) in installed condition by metalizing, hard facing of bowl surface with bull ring segments erosion size up-to or less than 4" x 4" of 1 Segment.(Time of completion = 48 Hrs.)

Repairing and reconditioning of eroded portion of bowl (erosion due to worn-out of bull ring segment) in installed condition by metalizing, hard facing of bowl surface with bull ring segments erosion size more than 4" x 4" of 1 Segment erosion size more than 4" x 4" and up-to 6" x 5" of 1 Segment.(Time of completion = 72 Hrs.)

Repairing and reconditioning of eroded portion of bowl (erosion due to worn-out of bull ring segment) in installed condition by metalizing, hard facing of bowl surface with bull ring segments erosion size more than 4" x 4" of 1 Segment erosion size more than 6" x 5" of 1 Segment.(Time of completion = 96 Hrs.)

Breakdown & Maintenance / Overhauling work of Gravimetric Coal Feeders 250 MW

Replacement of COC Gear Box with new/serviced gear box.(Time of completion = 08 Hrs.)

Servicing / Rectification of defects of clean out conveyor of GCF.(Time of completion = 08 Hrs.)

Servicing/repairing of span/ weigh span roller.(Time of completion = 04 Hrs.)

Repairing of end door.(Time of completion = 04 Hrs.)

Servicing/repairing of air operated feeder outlet gate.(Time of completion = 08 Hrs.)

Servicing /repairing of manual Feeder inlet gate/bunker outlet gate.(Time of completion = 08 Hrs.)

Servicing of seal air valve of GCF.(Time of completion = 08 Hrs.)

Servicing of defective COC Drive (Quadruple Helix-worm unit).(Time of completion = 15 Hrs.)

Replacement /Repairing of belt scrapper.(Time of completion = 04 Hrs.)

Attending dust leakage from GCF body by welding/patching etc.(Time of completion = 04 Hrs.)

Servicing/Overhauling of Gravimetric Coal Feeder Main gear box.(Time of completion = 12 Hrs.)

Replacement / Servicing of Gravimetric Coal Feeder Head Pulley/power pulley/take-up pulley.(Time of completion = 08 Hrs.)

Servicing of Gravimetric Coal Feeder.(Time of completion = 16 Hrs.)

Servicing of clutch assembly.(Time of completion = 08 Hrs.)

Replacement of damaged feeder belt with new one of Gravimetric Coal Feeder.(Time of completion = 24 Hrs.)

Replacement of Main Gear Box of GC Feeder with new/serviced gear box.(Time of completion = 08 Hrs.)

Replacement of clutch assembly of GC Feeder with new/serviced.(Time of completion = 08 Hrs.)

Repairing/Replacement of grating of various sizes.(Time of completion = Hrs./m².)

Round the clock lifting and shifting of CMR, General Cleaning and removing of of choking from Mills of Unit # 8 & 9, DTPS

Round the clock lifting and shifting of coal Mill rejects spelled out from Pyrite Hopper and Mills (at ‘0’ Meter) of Unit # 8 & 9, 2X250MW, HTPS, Kasimpur to Coal yard of old Plant / 2X250 MW Plant or other specified places within the HTPS, Plant.

Filling and shifting of coal Mill reject from SILO system of Mill reject system of Unit # 8 & 9, 2X250MW, HTPS, Kasimpur to Coal yard of old Plant/2x250 MW Plant or other specified places within the HTPS, Plant.

Cleaning of mill floor (‘0’ & ‘3.5’ meter), mill associated auxiliaries, pulverize coal pipes, structure of mill, duct connected to mill at 3.5 meter floor, classifier top, Removing of settled coal/coal dust at Hot air gate/cold air gate and its platform, and ID/FD/ PA/Seal air fan foundation floors of Unit # 8.

Cleaning of mill floor ('0' & '3.5' meter), mill associated auxiliaries, pulverize coal pipes, structure of mill, duct connected to mill at 3.5 meter floor, classifier top, Removing of settled coal/coal dust at Hot air gate/cold air gate and its platform, and ID/FD/ PA/Seal air fan foundation floors of Unit # 9.

Cleaning of Feeder floor & associated structure to feeder floor of Unit # 8 .

Cleaning of Feeder floor & associated structure to feeder floor of Unit # 9.

Removal of major chocking of bowl mill & center pipe of bowl mill (From feeder outlet gate to liner body of mill) of Unit # 8.

Removal of major chocking of bowl mill & center pipe of bowl mill (From feeder outlet gate to liner body of mill) of Unit # 9.

Removal of major chocking of Coal feeder of Unit # 8.

Removal of major chocking of Coal feeder of Unit # 9.

Removal of major chocking of Coal feeder belt of Unit # 8.

Removal of major chocking of Coal feeder belt of Unit # 9.

Cleaning of P.A. duct internally from hot air gate to mill side liner body of Unit # 8.

Cleaning of P.A. duct internally from hot air gate to mill side liner body of Unit # 9.

Maintenance of Coal Pipes

TO ATTEND THE CHOCKING OF COAL PIPE

PATCH WORK ON COAL PIPE (DURING SHUT DOWN OF MILL) SIZE- 200MMX200MMM

CHANGING OF VICTAULIC COUPLING GASKET

REPLACEMENT OF COAL PIPE HANGERS.

REPAIRING OF COAL PIPE BENDS AT DIFFERENT ANGLES AT POSITION.

M/s Krishna Engineering Works (BID ID -5669070)

KIRAN KUMAR ENGG WORKS (BID ID -5668523)

RM TRIPATHI PRIVATE LIMITED (BID ID -5671099)