AMC for General, Routine, preventive, Breakdown Maintenance of Coal Mills (Bowl Type HP 1103), Gravimetric RC Feeders (Belt Type) and PF Piping for 2x600 MW Unit-I AND II at RGTPP, Khedar, Hisar

Amount

Repair, replacement / servicing of 03 Nos. journal assy. including journal head liners, trunion bushes & all its components including alignment of bearings for all three nos. roller assy.,oil seals and seal wear ring replacement and again installation and normalization including hard facing, if any without roller replacement.

Work same as above, for 1 no. roller assy.

Replacement / repair and servicing of spring assembly opening and re-fixing of all components. Setting the desired spring compression and normalization.

Removal of journal assembly from mill, Replacement of mills grinding roll and re-fixing (3 Nos.)

Work same as above, but for one roller assembly.

Replacement of trunion bush for 1 no. roller assy.

Rotation of trunion from one position to another for all three roller assembly of mill.

Replacement of worn out bull ring segments and normalization.

Replacement of bowl extension ring segment's (Set of Eight pieces).

Work same as above, for one Bowl extension ring segments.

Replacement of complete worn out vane wheel assembly consisting of Eight segments.

Work same as above, for one no. vane wheel segments.

Replacement of air restriction ring.

Replacement of air restriction ring.

Replacement of deflector liners support on all three sides of mills.

Replacement of deflector liners supports one side of mills.

Replacement of all deflector liners consisting of lower deflector liners & intermediate liners with weld plug arrangement.

Replacement of any type of the deflector liner/jr. assy. Guard/RLD/bottom liner/ with weld plug arrangement.

Repair/Replacement of upper & lower skirt assy. and normalization including cleaning of seal air ports.

Repair/Replacement of lower skirt assy. and normalization including cleaning of seal air ports.

Replacement of scrapper assembly.

Decoupling and Coupling of Mill including replacement of components, if required.

Replacement / Repair of mill motor coupling, mill motor alignment & normalization.

Replacement/servicing of Pulverized Coal Gate valve at any location.

Repair / Replacement of I No. MPO After removing of discharge gate valve including hard facing, if any, re-fitment / alignment of PC pipes & necessary locking of pipes.

Repair / Replacement of all 4 Nos. MPO after removing of all 4 nos. discharge gates, hard facing if required including locking of coal pipes.

Replacement / repair / hard facing of ventury and ventury collar.

Replacement/Repair/Rotations of inner cone and hard facing if required.

Servicing / Replacement of all the classifier vanes of coal mill.

Replacement / repair of ventury vanes set of 4 PCs & hard facing, if required.

Replacement of mill side liners & Wear Plate including providing the insulation.

Gap Setting of Clearance Air Seal Assy. including opening & refixing of air seal guard.

Complete overhauling of mill including all the works mentioned above, as per requirement of mill.

Repair of bowl/bowl hub or both.

Dismantling, complete servicing of planetary gear box of coal mill including replacement of required components / Oil, refixing after assembly and normalization.

Replacement of damaged bolts of mill base of mill after opening of bowl cover and related components including tilt out of roller assy., if required. Refixing and normalizing.

Replacement of Lube Oil after cleaning / flushing of oil tank and gear box. Diesel for flushing shall be arranged by the firm.

Replacement of bolts of inner cones / support pipes (03 Nos.)of inner cones of coal mills.

Servicing of raw coal gate (feeder inlet/outlet/Bunker outlet).

Replacement/opening & refixing of belt including cleaning / servicing of head pulley/take up pulley /span rollers all the relevant components (full work).

Opening & refixing of all skirt plates including repairs if any.

Servicing /replacement of belt drive reducer gear box including replacement of components. Dismantle and mountings of motor.

Decoupling/coupling of belt drive motor & its alignment with gear box.

Replacement / opening & refixing of dresser coupling of RC feeder.

Repair / Replacement of Down Spout/Cone of center feed pipe of RC Feeder.

Repair / servicing of cleanout conveyor chain by changing chain pin / link etc. and normalization of relevant components.

Repair / servicing / replacement of cleanout conveyor gear box including normalization.

Attending leakage by MS/SS welding in coal discharge feed pipe or any location for attending leakage by patch. The size of patch is Approx. up to 250X300 mm and 12mm thick.

Erection and removal of scaffolding to facilitate maintenance work at coal mill/PC piping/Raw & pulverized coal gates at any location above 3 mtr. Sqr.

Replacement of PC bends/elbow or transition piece / Spool piece with coupling or after fitting of 1meter straight pipe at both ends.

Replacement / opening and refixing of Victaulic coupling including replacement of rubber gasket.

Opening and refixing of expansion bellow assembly of pulverized coal pipe/PA duct including repair of protection plate at inside.

Replacement of straight pieces of coal discharge pipe of diameter 28“/center feed pipe of mill.

Replacement/Repair / Servicing of wearable adjustable shrink hole (adjustable orifice) in pulverized coal piping.

Servicing of one no. power cylinder & reinstalling In its position.

Servicing of hot air regulating dampers including replacement of bearings of shaft/links if any (06 Nos.)

Servicing of cold air gate/ hot air gate including replacement of SS seals of hot shut off gates, if any

Servicing of cold air damper.

Replacement of Actuator installed at hot / cold / mix air damper and Feeder gates at any elevation.

Servicing of mechanical portion of actuator / replacement of actuator. Mechanical servicing of seal air damper/feeder outlet or inlet gate.

Replacement of water line valve/ airline valve/ flow-Sight (including servicing) up to I00mm NB.

Servicing of any seal air valve in mill/ RC feeder.

Clearing of choking of mill at duct inlet/scrapper body.

Replacement / repair of eroded MS sheet of duct.

Welding of air duct / Structure.

Repairing/servicing of hoist in coal mill areas.(16 Ton capacity single girder under slung beam motorized LT drive).Total hoists installed 28 Nos.

Dismantling & refixing of the motor of hoist.

Lube oil pump replacement/repair including opening and refixing of spider rubber / coupling and alignment.

Replacement / servicing of mech. Seal of lube oil pump, orifice replacement / preventive maintenance including replacement of spider rubber and alignment

Painting after thorough cleaning of surface (Two coats). Paint to be provided by HPGCL.

Fabrication and erection of Steel (Time as per indent).

POWERTECH ENGINEERING CO

Gill Engineering Pvt. Ltd.