TTPS Operation circle MPM I Unit I Assembling I - Assembling of Mill 1D with dismantled spares from Mill 3F

Toping of Mill gearbox oil completely, cleaning the gearbox internals like worm shafts and worms wheel. After inspection filling the gearbox with new/old oil including devolution of old oil to stores etc, (Department vehicle will be provided for drawl of oil at free of cost). (50 % of the value taken for assembling)

Charges for assembling the gear coupling bolts, gear coupling (worm shaft only), distance piece, unscrewing the worm shaft extension cover bolts and bearing housing cover bolts, removing the worm shaft extension cover, lowering to ground floor, releasing the worm shaft assembly from its position and assemblies providing back the overhauled worm shaft assembly in the gear box and fitting back the worm shaft extension cover, bolting and tightening the bolts to the required torque level and assembling back the gear coupling bolts, distance piece etc(50 % of the value taken for assembling).

Charges for assembling the worn out rubber element in the mill motor coupling, cleaning inspection and replacement of new rubber element and checking the tightness of coupling including cost of consumables etc., (50 % of the value taken for assembling)

Charges for assembling the Spool pieces, multiple port outlet bodies and transition pipes 4 Nos. each after assembling the coal pipe inspection with center feed pipe structures. (50 % of the value taken for assembling)

Charges for fixing of orifice 1 No. after dismantling the victaulic coupling.(50 % of the value taken for assembling)

Charges for fixing of mill journal doors including lead, lift and transporting of materials fromstores and devolution of scraps from site to stores and cost of consumables such as welding electrodes, gas, cotton waste etc., (50 % of the value taken for assembling)

Charges for fixing of journal with trunnion assembly in the mills including lead, lift and transporting of materials from mill repair bay to mill floor and back, devolution of scrap to stores and cost of consumables such as welding rod, cutting gas, cotton waste etc. (50 % of the value taken for assembling)

Charges for changing of bowl extension ring (6 nos) per mill including lead, lift and transporting of materials from stores to mill floor and back.

Charges for assembling of lube oil cooler, from lube oil system,cleaning, flushing the cooler, oil pipe lines, water pipe lines, oil separator tank, checking of water lines, valves and nipples.

Charges for providing wedges between lower skirt and Mill insulation cover plate firmly, removal of gearbox bottom cover flange bolts, lowering the thrust bearing and pump housing after supporting lower radial bearing housing. Lowering the thrust bearings and reassembling of all the above parts (50 % of the value taken for assembling)

Charges for lifting the vertical shaft along with worm gear and worm wheel from top of the gear box and place it in stand. Dismantling the worm wheel hub lock nut and removal of worm wheel from the worm hub by steam/induction heating. Inspection of upper redial bearing and renewal if necessary. (50 % of the value taken for assembling)

Charges for assembling of worn out thrust bearing of Mill vertical shaft by gas heating the racer, cleaning the bearing seating area in the vertical shaft. (50 % of the value taken for assembling)

Charges for Removing the thrust bearing adopter (worn out) and assembling the new adopter by heating (50 % of the value taken for assembling)

Charges for fixing of seperator body along with classifier assembly. Inner cone mill outlet plate and venturi dismantling the air inlet housing after segregating from hot air duct placing in appropriate place. Dismantling the bowl with bowl hub and separating the bowl hub from bowl and in filling the same. (50 % of the value taken for assembling)

Charges for assembling of upper skirt assembly, lower skirt assembly, Mechanical face seal assembly, dust guard and blue matching of seal runner, renewal of seal( bronze), air seal, dismantling of Mill bottom cover, upper bearing housing cover, oil seals etc.,(50 % of the value taken for assembling)

Charges for assembling the triangular liners, cutting the bulged Mill bottom plate, applying refractory cement at the Mill bottom plate 1 set by providing bolts and welding.(50 % of the value taken for assembling)

Charges for assembling the radial bearing after removing the oil pump hub and oil pump bushing.(50 % of the value taken for assembling)

Charges for changing worn out scraper pin, bush, pin cover, re conditioning of scrapper, cleaning of under bowl, checking of clearance, inspection and welding of wheels support lugs, wall side liners etc in mill under bowl. (50 % of the value taken for assembling)

Assembling of clamping ring, removing the worn out bull ring segment, cleaning threaded holes using M24 tap set, preparing the bowl for fixing bull ring segments, assembling the bull ring segments, making wedges, fixing the clamping ring and bowl hub cover. (50 % of the value taken for assembling)

Charges for assembling the worn out air port ring complete assembly by cutting and devolution the scrap to store and installing new air port ring and aligning it with the separator body by welding, hard facing them and welding of triangular liners (Welding rod will be supplied at free of cost), including hire charges for T&Ps and transportation charges and cost of consumables like cutting gas, grinding wheel etc.

Charges for checking the bearing clearance after dismantling the thrust bearing and radial bearing housing covers, removing the bushes, springs etc. thoroughly cleaning the bearing housings and other components inspecting the thrust bearings, resetting the axial clearance by reducing the thickness of shims in the thrust bearing housing cover, providing of new shims and by trial method adjusting the clearance to 0.10 mm to 0.15 mm. Assembling back the thrust and radial bearing housing properly and renewing the gland studs and gland packing in the worm shaft assembly.

Dismantling of worn out classifier assembly, inspection of deflector blade, cleaning, replacing of worn out deflector blade components renewal and assembling of new classifier assembly with its links. The overhauled classifier assembly was checked from 0 to 6 positions and ensured that the deflector blades, links move correspondingly to its position without any malfunction.

Assembling the mill top, cutting the centre feed pipe to the required length so as to lift eroded inner cone and brought it to 4.5 Mt. level as per the direction of Engineer in charge. (50 % of the value taken for dismantling)

Charges for dismantling the eroded inner cone from mill top and assembling the new / reconditioned inner cone.

Charges for dismantling the drum section of inner cone from mill top and replacing the new/ reconditioned one.

Charges for dismantling the worm shaft covers for releasing the worm shaft and refixing. This includes lead lift and fabrication of fixture and consumables.(50 % of the value taken for assembling)

Charges for transporting the worm shaft to work shop and renewal of radial & thrust bearing checking the clearance and changing of worn out spares. This includes lead, lift transportation and consumables such as cutting gas, diesel, cotton waste etc., (50 % of the value taken for assembling)

Contractor Scope Material: Full Threaded Hexagonal Head HT Bolt & Nut With Plain Washer Size: M 24 x 120mm Property class 10.9 as per IS:1367

Contractor Scope Material: Full Threaded Hexagonal Head HT Bolt & Nut With Plain Washer. Size: M 24 x 90mm Property class 10.9 as per IS:1367

Contractor Scope Material: Full Threaded Hexagonal Head HT Bolt & Nut With Plain Washer. Size: M 24 x 70mm Property class 10.9 as per IS:1367

Contractor Scope Material: MS bolt and nut with 2nos flat round washer IS 2062 Gr. 4.6 Size: M 16 x 60mm

Contractor Scope Material: MS bolt and nut with 2nos flat round washer IS 2062 Gr. 4.6 Size: M 20 x 120mm

Contractor Scope Material: M 16mm MS Hexagonal Nut Gr. 8.8

Contractor Scope Material: Allen Cap screw M16 x 60mm

Contractor Scope Material: HT Counter Sunk head screw HT Bolt M16*100mm full thread with one nut

Contractor Scope Material: Bolt Nut and Washer HT Bolts Nuts 2 Nos flat round washer M20*120mm Full Thread clause 10.9 Gr

Contractor Scope Material: HT Head Bolt M33x90mm (Full Thread), with spring washer clause 10.9Gr

Please Enable Macros to View BoQ information