Work of Breakdown maintenance overhauling Servicing of WTP CPP and WWT PLANT dosing systems of WTP 2x500 MW BTPS Anpara

Amount

Complete overhauling / servicing of following pumps, blowers, Fan, mixers etc. this includes the complete dismantling of the equipment, cleaning & checking, re-visioning of various parts, replacement of worn out parts, if required by new / repaired parts, alignment of auxiliary with motor and coupling. all overhauled / serviced equipment must be re-painted with one coat of Epoxy primer & two coat of Epoxy paint for the protection of pump, etc. after completion of work. Re-commissioning of equipment & trial run. [one job will be given for each pump / Blowers / Fan / Mixture / Clarifiers basis]

PUMPS

Raw Water Pump

Sludge Pump

Filter Back Wash Pump

Clarified Water Pump

Service Water Cooling Pump

Coagulant dosing pump (Reciprocating type)

Coagulant Transfer pump

Demin Plant Inlet Pump

Degasser Water Booster

Regeneration

D. M. Transfer

Alkali Preparation

Anion Hot Water

Acid Transfer

CPP Booster

CPP Regeneration

Ammonia Recycle

Ammonia Unloading

Sump Pump

Pit -3 Dewatering pumps

Discharge Pump

Ammonia transfer pump

Phosphate transfer pump

Hydrazine transfer pumps (Gear pump)

Ammonia injection pump

Hydrazine injection pumps

Phosphate injection pump

Submersible sump pumps 1.5Kw

Submersible sump pumps 0.75 Kw

Submersible sump pumps 3.7Kw

BLOWERS AND FANS

Filter Back wash Air Blower [PT Plant]

Demin Air Blower [DM Plant]

Regeneration Unit Air Blower [CPP]

Air Blower [Waste Water System]

Degasser Fan [DM Plant]

Mixers with Vertical Spindle & Motor Driven,

CLARIFICATOR

CLARIFICATOR oil pump Drive

Clarifier Scrapper & Turbine Drive

BREAK-DOWN MAINTENANCE

This includes generally the jamming of pumps due to ingress of foreign material in pump casing/ impeller. For attending the pump has to be dismantled from suction side/ delivery side, including realignment of pump. For removal of choking in the bearing cooling/ gland cooling all the connected lines has to be dismantled & cleaned thoroughly & then assembly of system. For changing ratchet plate, spacers, stuffing box, sealing ring, etc. the motor above the pump has to be lifted & fault has to be attended by dismantling the other necessary parts of pump. After attending the fault the system hasto be normalized for running including placement of motor alignment & coupling.

Raw water pump, Sump pump CPP & Pit-3 Sump pump.

Replacement of ratchet plate

Replacement of worn out gland cover of stuffing box holding bolts.

Replacement of worn out rubber spacer of coupling.

Replacement of worn out bearing.

Replacement of sealing ring of stuffing box.

HORIZONTEL CENTRIFUGAL PUMP

Removal of jamming of impeller because of ingress of foreign material.

Replacement of damaged bearings of pumps.

Replacement of worn-out pump casing gasket / 'O' ring.

Removal of jamming of Alum transfer pump.

Reciprocating Type Pump

Replacement of Pump Diaphragm.

Replacement of Venire Pump

Arresting of pump leakage either from pump oil side or from chemical side.

Replacement of pump coupling/ Coupling hubs & associated works.

General Break down

Providing of new foundation bolts, casing bolts/studs etc. of the equipment after taking out broken studs/bolts by way of drilling tapping etc. on channel foundation.

Replacement of following valves with new / repaired valves by dismantling and of old valve from system and fitting of new / repaired valve..

Butterfly valve ( 50 mm to 600 mm)

Plug Valve ( 20 mm to 200 mm)

Diaphragm valve (08 mm to 200 mm)

Check Valves ( 25 mm to 500mm)

Ball Valve ( 40mm to 100mm)

Gate valve( 15mm to 300 mm)

Re-visioning /overhauling / servicing of hand/ pneumatic/ electrical operated following valves only mechanical portion of valve.

Butterfly valve ( 50 mm to 600 mm)

Plug Valve ( 20 mm to 200 mm)

Diaphragm valve (08 mm to 200 mm)

Check Valves ( 25 mm to 500mm)

Ball Valve ( 40mm to 100mm)

Gate valve( 15mm to 300 mm)

Pump Re-circulation valve(200NB)

Instrument Isolating valve (1/2 " to 3/8")

Modulating control valve(100mm NB)

Pressure reducing and pressure relieving valve of following size

Servicing & Overhauling of pneumatic / electrically operated penstock gates of gravity filter, channel inlet, gravity filter inlet & gravity filter back wash outlet only mechanical portion .

Replacement of C.I./ M.S. Pipe of flange/ weld joint including removal of old pipe (20mm to 450mmNB) by cutting including dismantling & transportation to WTP store. [This includes laying, transportation of pipe & necessary required material from store to work site lifting to work site, cutting, welding, preparation of necessary bend, tee, off set, of pipe lines, clamping, providing vent if required, jointing with nut bolts, welding, welding of flanges, valves including removal of old pipe (15 to 450NB) by cutting including dismantling & transportation to WTP store & any other work required for the completion of pipeline etc.]

Erection of New C.I. / M.S./G.I./ MSRL/HDPE Pipe of flange/ weld joint (15mm to 450mmNB) [This includes laying, transportation of pipe & necessary required material from store to work site lifting to work site, cutting, welding, preparation of necessary bend, tee, off set, of pipe lines, clamping, providing vent if required, jointing with nut bolts, welding, welding of flanges & valves, & any other work required for the completion of pipe line etc. Note:- For the painting of erected pipelines with one coat of primer of first quality, followed by two coats of approved colour of first quality paint, item no. Part –D, 1,2,3 & 4 can be utilised, and Item no. Part – E- a) & b) can be utilised for the erection of support & structure.]

Attending the leakages from sludge pipeline joints including joint dismantling, re-fixing/replacement of rubber ring & rejoining with alignment.

Attending leakagea from 25mm to 450mm pipe line of DM water transfer pipe,Service water pipe, Waest water pipe & other miscellaneous pipe by cutting welding etc.including excavation.Dewtering if required and back filling etc.

Attending the leakages from Acid/ Alkali transfer pipeline joints ( Made of HDPE) including joint dismantling, re-fixing /replacement & rejoining(By Mirror jointing kit or suitable jointing resin ) with alignment.

Surface protection & Painting work as and when required to prevent damage of system by chemical reaction.

Surface cleaning, preparation & application of one coat of Epoxy primer (Epilux-610) on the old surface for protection of surface up to 5 sq. meter in single job.

Application of two coat Epoxy paint (Epilux- 4) on the old surface for protection of surface up to 5 sq. meter in single job.

Surface cleaning, preparation & application of one coat of primer paint on the old surface for protection of surface up to 5 sq. meter in single job.

Application of two coat Enamel paint on the old surface for protection of surface up to 5 sq. meter in single job.

Repairing of damage Acid proof Brick Lining including cost of material required to complete the work.

Pointing work of brick lining including cost of material required to complete the work.

Mastic lining work including cost of material required to complete the work.

Resin lining work including cost of material required to complete the work.

Repair and fabrication of structure and new items

Replacement of damage structure, railing & support of vessels.

Fubrication of Flang of different sizes From MS/Steel Plate by cutting/drilling/grinding.

Fubrication of Pipe/bend/reducer/Tee of different sizes fram MS pipe by cutting /welding/bending/drilling and grinding.(teken fom new/old MS pipe)

Fabrication work of the various structure /and item by using various steel sections [new / old taken from scrap]

Overhauling & repairing of Gravity Filters

Removal of filter media by collection , lifting from the bed of filter ,stacking at ground floor on clean surface, cleaning by water, sheaving with different size of sheaves, separation of filter media in different size, refilling as per instruction of Engineer of contract in filter in different thickness after repairing of filter's internal, replacement of damaged parts & necessary repair if any complete in all respect

Epoxy painting two coats after cleaning & preparation of surface on the internal/ external surface of filters only with item no Part-F (a).

Black Bitumen Acid/ Alkali resistant paint coating two coats after cleaning & preparation of surface on the external surface of filter's structure ( Valves Side) only with item no Part-F (a).

Repairing / replacement, cleaning of filter air/ water nozzles & other internals, including any necessary repair for the completion of work etc. including epoxy painting one coat of primer, two coats of epoxy paint after cleaning & preparation of surface on the internal fitting of metallic part of filter only with item no Part-F (a).

Transportation of Chemicals & Lubricants & other materials

Loading & unloading, transportation & stacking of chemicals /lubricant from central stores to various site store or inter stores.

Solid /liquid chemicals

Liquid chemicals

Loading, unloading, transportation & stacking of light chemicals, glass lab wares and other misc. material from central store to site store or inter stores.

Shifting of chemicals from WTP site stores to express laboratory / Coal Lab / CPP.

Work of Brian Treatment

Help in Brine treatment of anion bed resin of DM water Stream

Help in Brine treatment of mixed bed anion resin of DM water Stream

M/S NISHA ENTERPRISES

M/s Krishna Engineering Works