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Bids Are Invited For Annual Rate Contract For Mechanical Maintenance Jobs During 2026- Part A And B; 1.00 OPENING AND BOXING UP OF FLANGES 1.01 Flanges upto and including 300 PSI # 1.02 Flanges 600 # to 900 PSI # 1.03 Flanges above 900 PSI # 2.00 INSTALLATION OF VALVE/TRAPS 2.01 Valves upto and including 300 PSI # 2.02 Valves 600 # to 900# 2.03 Valves above 900 # 3.00 Fabrication, Erection and Dismantling of piping as per scope of work 3.01 Fabrication of Carbon steel Upto and including Sch 40 3.02 Fabrication of Carbon steel Above Sch 40 and upto Sch 80 3.03 Fabrication of Carbon steel Above Sch 80 and upto Sch 160 3.04 Fabrication of Stainless steel Upto and including Sch 40 3.05 Fabrication of Stainless steel above Sch 40 and upto Sch 80 3.06 Fabrication of Stainless steel Above Sch 80 and upto Sch 160 3.07 Fabrication of Alloy steel Upto and including Sch 40 3.08 Fabrication of Alloy steel Above Sch 40 and upto Sch 80 3.09 Fabrication of Alloy steel Above Sch 80 and upto Sch 160 3.10 Erection of Piping all material Upto and including Sch 40 3.11 Erection of Piping all material Above Sch 40 and upto Sch 80 3.12 Erection of Piping all material Above Sch 80 and upto Sch 160 3.13 Dismantling of pipe including all valves/instruments / traps 4.00 Straight cutting and welding jobs on plates 4.01 Cutting Jobs of CS Material. 4.02 Cutting Jobs of SS Material. 4.03 Welding Jobs of CS Material. 4.04 Welding Jobs of SS Material. 5.00 Jobs pertaining to Earth Moving 5.01 Replacement of gear box of dozer. 5.02 Replacement of engine of dozer. 5.03 Servicing of dozer 80 D A 12. 5.04 Servicing of 35 T, 82 T, 120T and 300 T cranes. 5.05 Servicing of coles cranes 8T/12T. 5.06 Servicing of escorts cranes. 5.07 Servicing of air compressor and welding sets. 5.08 Servicing of locomotive WDS-4. 5.09 Servicing of locomotive BHEL make. 5.10 Cleaning of radiator of dozer. 5.11 Cleaning of air filters of dozers. 5.12 Reducing and extension of mobile crane boom. 5.13 Dismantling and Assembly of coal dozer blades 5.14 Servicing of Diesel Engines for Fire Booster pumps 5.15 Servicing of Auto vehicles 5.16 Dismantling and Assembly of Track Assembly 5.17 Replacement of steering assembly of Dozers 5.18 Loco Hard greasing 5.19 Loco soft greasing 5.20 Cleaning of Locomotive/BHEL radiators 5.21 Servicing of diesel engines of generators sets 5.22 Cleaning of radiator of BEML dozers engine 5.23 Servicing & greasing of Backhoe loader 5.24 Servicing & greasing of Excavator 5.25 Servicing & greasing of Pay loader 5.26 Servicing & greasing of Fork Lifter 6.00 JOBS OF HEAT EXCHANGERS/TUBE BUNDLES. 6.01 Heat exchanger 6.02 Tube Bundle 6.03 Opening and Box up of Flat Ends of Heat Exchangers 6.04 Opening and Box up of Dished Ends of Heat Exchangers 7.00 MISC. FABRICATION, ERECTION AND DISMANTLING OF STRUCTURE (MS/CS) 7.01 Fabrication of MS/CS material. 7.02 Dismantling of MS /CS material. 7.03 Erection MS/CS 7.04 Replacement of Gratings 7.05 Fabrication and installation of safety guards. 8.00 FABRICATION, ERECTION AND DISMANTLING OF SS MATERIAL 8.01 Fabrication of SS material. 8.02 Dismantling of SS material. 8.03 Erection SS material 9.00 HANDLING OF EQUIPMENTS & MATERIAL 9.01 Handling of equipment vessels, other parts and misc. items within plant/workshop. 9.02 Shifting of equipments vessels, equipments and other parts from one plant to other or workshop/store. 10.00 Attending leakages for steam, water, air, gas, process fluid etc. Contractor's scope includes Scaffolding arrangement if any, gas cutting, grinding, welding and fixing of feed plate/clamp as per requirement. 11.00 JOBS PERTAINING TO BELT CONVEYORS 11.01 Vulcanizing of nylon conveyor belts - Hot Process(mm) 11.02 Vulcanizing of nylon conveyor belts - Cold Process(mm) 11.03 Repair of fabric/nylon belts by patch work - Hot Process(cm2) 11.04 Repair of fabric/nylon belts by patch work - Cold Process(cm2) 11.05 Repair of conveyor carrying / return rollers 11.06 Repair of fastner joints for 500-1000 mm wide belts. 11.07 "Positioning of fallen belt, preparation and making new joint/ Replacement of old conveyor belt with new conveyor belt. Preparation of Joints for 500 mm to1000 mm wide belt" 11.08 "Positioning of fallen belt, preparation and making new joint/ Replacement of old conveyor belt with new conveyor belt. Length of belt to be handled 500 mm to1000 mm wide belt (Mtrs)" 11.09 Replacement of head/tail/snub/takeup pulley of 500 mm to1000 mm wide belt 12 JOBS PERTAINING TO UREA PLANT 12.01 Manifold replacement. 12.02 Compressor valve replacement. 12.03 CentIfugal pump replacement (25-50 NB) as per discharge nozzle. 12.04 Centrifugal pump replacement (51-80 NB) as per discharge nozzle. 12.05 Centrifugal pump replacement (81 NB and above) as per discharge nozzle. 12.06 HP valve replacement (10 mm - 50 mm). 12.07 HP valve replacement (51 mm - 200 mm). 12.08 Gear box replacement for cooling tower fan. 12.09 Drive shaft replacement for cooling tower fan. 12.1 Diaphragm valve bonnet replacement (15-150 mm) 12.11 Diaphragm valve bonnet replacement (150-200 mm) 12.12 Flange tightening of exchanger. He-1 top & Bottom 680 NB 12.13 Column C-1, Top & Bottom 700 NB 12.14 Internal inspection of condenser E-1N. 12.15 Cleaning of Urea Dust dissolving tank filters. 12.16 Cleaning of Urea candle Filters. 12.17 Opening and Boxing up of Both side Domes of He-1 to attend tube leakage 12.18 Replacement of cooling Tower Pumps with spare reconditioned one. 12.19 Opening and Box up of Suction Strainers of CO2 Compressor 10-CA-1 12.2 Opening and Box up of Suction Strainers of CO2 Compressor 10-K-1/N 12.21 Cleaning of Neem Oil Bucket Filter (New Item) 13.00 JOBS PERTAINING TO NAP 13.01 Opening and boxing up of burners for replacement of catalyst. 13.02 Opening and boxing up of MG filters for replacement of candles in NAP. 13.03 Patch Work of welding of SS-304 (Running inch) 14.00 JOBS PERTAINING TO UREA BAGGING 14.01 Replacement of bucket of B/E of scrapper. 14.02 Replacement of bracket/blade of job chain of scrapper. 14.03 Replacement of bucket / brackets of B/E of Urea scrapper. 14.04 Replacement of bracket and blade along with chain (links pair) of job chain of Urea scrapper. 14.05 Replacement of Gearboxes in Urea bagging. 14.06 Execution of B/E assembly installed at Urea Bagging platform. 14.07 Replacement of scrapper jib driven shaft & sprocket assembly 14.08 Replacement of scrapper driven drum plumber block 14.09 Replacement of scrapper jib shaft 14.1 Replacement of scrapper jib inner link 14.11 Replacement of scrapper bucket elevator inner & outer link 14.12 Replacement of scrapper crown gear pin 14.13 Replacement of scrapper crown gear sheared locking stopper 14.14 Replacement of scrapper bucket elevator guide roller 14.15 Replacement of scrapper bucket elevator complete chain assembly 14.16 Replacement of scrapper complete jib 14.17 Replacement of urea scrapper complete jib 14.18 Replacement of urea scrapper bucket elevator chain link 14.19 Replacement of urea scrapper jib link 14.2 Preparation of conveyor belt vulcanizing joint 14.21 Inspection & tightening of nut / bolts of Crown gear and king post (complete set in one time) 14.22 Repair / fabrication of brackets 14.23 correction / alignment of offcenter belt (length in meters) 15.00 Ash / Sand Blasting of Rotors / others. 15.01 Cleaning by sand blasting of hood along with L-pipe of Ammonia burners of Nitric Acid Plant. 15.02 Ash blasting of rotors of turbines of Ammonia-II plant or any other plant. 15.03 Surface area of different items of Unit and Expansion plants to be cleaned by sand blasting. 16.00 Cleaning of Water Reservoirs in TWW & Fire Station. 16.01 Cleaning operation (manual) of clarifier/Clear water reservoirs /steel tank /Bass tank/Fire Station reservoirs 17.00 JOBS PERTAINING TO AMMONIA PLANT 17.01 Fixation of sealant fitting clamps of leaking flanges, pipeline etc at different elevation of plant. This includes cutting of cleats, fabrication of clamp, erection of scaffolding, fixing of clamps, tightening of cleats - Piping upto 2" 17.02 Fixation of sealant fitting clamps of leaking flanges, pipeline etc at different elevation of plant. This includes cutting of cleats, fabrication of clamp, erection of scaffolding, fixing of clamps, tightening of cleats - Piping above 2" upto 6" 17.03 Fixation of sealant fitting clamps of leaking flanges, pipeline etc at different elevation of plant. This includes cutting of cleats, fabrication of clamp, erection of scaffolding, fixing of clamps, tightening of cleats - Piping above 6" 17.04 Opening and Boxing up of filter elements of the below mentioned equipments including removal of top cover, removal of candles, removal of bottom drain and refixing after cleaning/replacement for 154 LA/LB 17.05 Opening and Boxing up of filter elements of the below mentioned equipments including removal of top cover, removal of candles, removal of bottom drain and refixing after cleaning/replacement for 143 L/ 144 17.06 Opening and cleaning of Spraying Nozzles in Amm. Plant 17.07 Clamping on leaking steam, water, alkali, air, AMDEA, Nitrogen, Process gas etc. at different pipe rack elevation or ground floor of 1/2 " to 4 " 17.08 Clamping on leaking steam, water, alkali, air, AMDEA, Nitrogen, Process gas etc. at different pipe rack elevation or ground floor of 6 " to 8 " 17.09 Clamping on leaking steam, water, alkali, air, AMDEA, Nitrogen, Process gas etc. at different pipe rack elevation or ground floor of 8 " to 16 " 17.1 Removal/ replacement of Suction air filter of PAC. One set consisting of 12 small and 12 large elements 17.11 Fabrication of sparger for providing nitrogen/steam/cooling water. 17.12 Replacement of wooden supports after removal of decayed wooden section Size 2”to 6” pipe size. 18.00 JOBS PERTAINING TO GTG-HRSG 18.01 Replacement of filters of Air Intake System - Inner pulse jet filters 18.02 Replacement of filters of Air Intake System - Outer pulse jet filters 18.03 Replacement of filters of Air Intake System - Static filters 18.04 Replacement of filters of Ventilation System 19.00 Testing (including overhauling) and Certification of Lifting Tools Tackles & Overhead Cranes 19.01 Chain Pulley Blocks Upto 1.5 Te 19.02 Chain Pulley Blocks Upto 1.6 Te to 5.0 Te. 19.03 Chain Pulley Blocks Upto 5.1 - 10Te. 19.04 Chain Pulley Blocks Upto >10Te. 19.05 Coffin Hoists Upto 1.5 Te 19.06 Coffin Hoists 1.6 to 5.0 Te. 19.07 Coffin Hoists 5.1 – 10 Te 19.08 Monorails Upto 5 Te 19.09 Monorails 5.1 Te to 10 Te 19.1 Monorails 10.1 Te to 25 Te 19.11 Electric hoist up to 5 Te. 19.12 Overhead cranes (elect. & hand operated) up to 5 Te. 19.13 Overhead cranes (elect. & hand operated) 5.1 -15 Te 19.14 Overhead cranes (elect. & hand operated) 15.1 - 20Te. 19.15 Overhead cranes (elect. & hand operated) Above 20 Te 19.16 Mobile Cranes 3 Te. 19.17 Mobile Cranes 5 Te. 19.18 Mobile Cranes 8 Te. 19.19 Mobile Cranes 10 Te. 19.2 Mobile Cranes 35Te. 19.21 Mobile Cranes 82 Te. 19.22 Mobile Cranes 120 Te. 19.23 Mobile Cranes 300 Te. 19.24 Load Test of breaker Trolley 19.25 D-Shackle of various sizes 19.26 Slings of various sizes 20.00 Making arrangements for inspection of Boiler as per IBR 21.00 Jobs Pertaining to SGP. 21.001 General Overhauling of bowl mill. 21.002 General overhauling of exhauster. 21.003 Dismantling & assy. of bowl mill vertical shaft. 21.004 Opening and closing of individual manhole covers of EPS/ Boiler No. I, II, III & IV. 21.005 Removal/re-fixing of coal/tail gas air Nozzles for all four corners of the boiler. (one corner’s coal Nozzles 2 nos. air nozlles 2 Nos. and one Natural Gas burner). Removal and re-fixing of PF elbow before Nozlles to execute the job is also included. 21.006 "Removal and replacement of PF line bend or pipe at all the elevation of refill distributor or fan intake pipe and bend. This include cutting of bends/pipes, transportation of material to site of work. Fixing and welding and cleaning are after completion of job etc. with respect to. A) Victualic coupling/flanges, bend, pipes, refill distributor etc." 21.007 "Removal and replacement of PF line bend or pipe at all the elevation of refill distributor or fan intake pipe and bend. This include cutting of bends/pipes, transportation of material to site of work. Fixing and welding and cleaning are after completion of job etc. with respect to. B) Basalt/tiscral/ceramic lines bends/pipe with welded end connections." 21.008 Replacement of bull ring segment, extension rings, bottom lines, separator body lines and side liners. 21.009 Bowl mill exhauster, replacement of fan and whizzer blades. 21.010 Bowl mill exhauster replacement of spider along with whizzer disc, blades and fan blades. 21.011 Replacement of periphery liners of exhauster.Rate per liner 21.012 Replacement of exhauster Pedestals. 21.013 Complete overhauling of clinker grinder. 21.014 Complete overhauling of coal crusher. 21.015 Replacement of grinding roll sleeve of bowl mill. 21.016 Replacement of worm shaft assy. of bowl mill. 21.017 Replacement of classifier vanes. 21.018 Replacement of classifier cones. 21.019 Replacement of RC feeder body of bowl mill. 21.020 Replacement of extension ring of bowl mill. 21.021 Replacement of skirt assy. and scrapper holder of bowl mill. 21.022 Replacement of whizzer angle and dynamic balancing. 21.023 Replacement of Y bends/elbows of fly Ash line. 21.024 Replacement of EV/SV/MHV in deashing 21.025 Replacement of Fly Ash Line (8” size) meter 21.026 Partial Reconditioning of Clinker Grinder (Brg. Replacement/Gland repacking) 21.027 P.F. line Patching-up. Sq.Inch 21.028 Replacement of Whizzer Disc of exhauster Fan. 21.029 Replacement of 30” dia fan intake pipe. 21.030 Replacement of Fan intake pipe bend (30” dia) 21.031 Replacement of Ash Separator plate of Ash Separator tank. 21.032 Skin casing cutting & welding (ISSH & economiser) Sq.Mtrs. 21.033 Plugging of economiser/ISSH/Bank tubes. 21.034 Replacement of exhauster casing (Bowl Mill) alongwith lines. 21.035 Overlaying of ISSH/ economiser/ Water wall tubes. Sq.Inch 21.036 Maintenance rounds in Night shift. 21.037 Adjustment of Bowl Mill Rollers. (All three) 21.038 Replacement of Scrapper/Scrapper holder 21.039 Hardfacing of Spider of bowl mill - exhauster and repair of fan blades and whizzer discs. 21.040 Dynamic balancing of bowl mill exhauster 21.041 Blue matching of worm shaft and worm gear 21.042 Replacement of coal Nozzles along with tip of Boiler No. I, II, III. 21.043 Replacement of cloth of complete telescopic chute of fly Ash silo at loading station (1 Set) 21.044 Replacement of convertor of Bowl mill. 21.045 Blue matching of vertical shaft of bowl mill 21.046 Dynamic balancing of I.D/F.D Fans 21.047 Repair of extension ring of Bowl Mill 21.048 Replacement of ejector head of Hydrovector 21.049 Replacement of throat pipe of Hydrovector 21.050 Exhauster discharge valve & neck 21.051 Breaker plate of coal crusher 21.052 Replacement of coal crusher hammer set 21.053 Main steam stop valve/start up vent valve gear box 21.054 Replacement of Ash slurry Pump 21.055 Gear box R C Feeder 21.056 Replacement of Booster pump 21.057 Replacement of ID Fan I/B & O/B bearings 21.058 Replacement of gear boxes of ET-1,2,3,4&5 21.059 ET-6 conveyor belt/Trolley Gear Box 21.060 Replacement of conveyor bracket 21.061 Replacement of conveyor belt(1000 mm width) ET-1 to 4) 21.062 Replacement of conveyor belt(800 mm width) (ET-6) 21.063 Replacement of conveyor belt(500 mm width) ET-5) 21.064 Replacement of Refill Distributor 21.065 Replacement of Distributor body 21.066 Replacement of Adjusting Stud 21.067 Preparation & Replacement of separator body 21.068 Replacement of Journal stops bushing & bolt. 21.069 Assembly of Exhauster Cover. 21.070 Replacement of R.C. Feeder Chute. 21.071 Replacement of Snub drum. 21.072 Replacement of Crusher Chute. 21.073 Replacement of Vibration Feeder pan. 21.074 Repair of damaged grill of ET-6, ET-1, ET-4 21.075 Repair of steam ejector at Bottom Ash hopper. 21.076 Replacement of Air Separator Tank. 21.077 Replacement of Cone 21.078 Plugging of Air Pre-heater tubes. 21.079 Replacement of Wagon tippler Rope 21.080 Replacement of B.A.H. Gate Assembly. 21.081 Installation of Valves (plate valves) 21.082 Installation & removal of Bellows 21.083 Replacement of Candles, filter belts in ash silo -4 sets (1 set = 49 filter candles) 21.084 Replacement of P.F. Bends, Quantity 21.085 De-choking of 3,4 inch lines, 21.086 Replacement of Wire & Ropes 21.087 Replacement of Wagon tippler counter weight Rope 21.088 Replacement of Dome Valve 21.089 Replacement of Seals 21.090 Replacement of OSM system, fly ash, distance pieces of size 3-inch of standard length of 6 Mtrs 21.091 Replacement of OSM system, fly ash, distance pieces of size 4-inch of standard length of 6 Mtrs 21.092 Replacement of 1" NRV alongwith flexible pipes 21.093 Replacement of Air Filters of ELGI Compressor 21.094 Replacement of Oil Filters of ELGI Compressor 21.095 Replacement of Separator element of ELGI Compr. 21.096 Replacement of small & Big hammers of old ESPs 21.097 Replacement of shafts of ESPs 21.098 Replacement rapping motor gear box 21.099 Replacement of impeller of blower installed at the top of the fly ash Silo 21.100 Replacement of Ash Water Pump 21.101 Replacement of carrying/return idler of ET-1, 2, 3, 4, 5, 6 & wing conveyor 21.102 Replacement of I/B & O/B bearings of Scanner cooling air fan of HRSG 21.103 Repair of GTES/seal air fan of HRSG 21.104 Replacement of broken studs of breaker plate of coal crusher 21.105 Replacement of Rubber pad of wagon tippler along with scaffoding erection 21.106 Replacement of convertor head flapper of Bowl Mill
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