Overhauling Of Mssv Valve ( Right ) , Renewal Of Defective Mssv Valve ( Left ) By Reconditioned Mssv Valve, Overhauling Of Boiler Safety Valves & Hp / Lp Valves, Overhauling Of Electrically Operated Actuators And Safety Valve Floating During Annual Overhaul For The Year 2023-24. 1 Overhauling Of Hp / Lp Valves, This Overhauling Involves Dismantling, Inspection, Rectification Of Defects If Any, Lapping Of Valve Seat And Disc Renewal Of Sealing Rings, Gland Packing, Flange Gaskets, And Bonnet Gasket Cleaning All Parts, Inspection Of Drive Bush, Bearing Etc. And Renewing If Necessary And Assembling Of Valves. Including Consumables And T&P’S. Nb - 65 / 100 / 150 / 250 / 650 Mm Valves And Nrv Of Class 1500 / 2500. 2 Overhauling Of Hp / Lp Valves, This Overhauling Involves Dismantling, Inspection, Rectification Of Defects If Any, Lapping Of Valve Seat And Disc Renewal Of Sealing Rings, Gland Packing, Flange Gaskets, And Bonnet Gasket Cleaning All Parts, Inspection Of Drive Bush, Bearing Etc. And Renewing If Necessary And Assembling Of Valves. Including Consumables And T&P’S.40 Mm To 50 Mm Size Valves. 3 Renewal Of Defective Mssv ( Left ) By Reconditioned Mssv Valve: Charges For Making Arrangements To Facilitate Leading, Lifting Of New Valve From Stores To Site And Old Valve From Site To Stores. Cutting, Removal And Re-Erection Of Existing Platforms, Structural Members At 52 M Level. This Work Involves Cutting, Removal And Re Erection Of Existing Platforms, Structural Members To Facilitate Movement Of New & Old Valves For Replacement Of Defective Mssv, Arranging Scaffolding Wherever Required For Cutting, Lifting And Lowering The Structural Members. 4 Charges For Drawl Of 1 No. New Main Steam Stop Valve ( Mssv ) From Stores, Leading Lifting And Transporting To Boiler Area, Arranging Scaffoldings, Sling Were Ever Required, Leading & Lifting The New Mssv To The Boiler 52Mtr Level At Right Side, Lowering Released Defective Mssv To The Ground Flower And Devolution The Defective Valve To Stores. Including Consumables And Hire Charges For T&P’S. 5 Charges For Transportation Of T & P’S, Platform Materials, Gas And Other Consumables To The Work Area, Arresting The M.S Line With Proper Supports, Cutting The Defective Valve, After Completion Of Work Normalizing The M.S Line. Including Consumables And Hire Charges For T&P’S. 6 Cutting Of Existing Mssv By Grinding, Edge Preparation Of Existing M.S Line & Reconditioned Valve, Positioning, Aligning And Fitting The Valve With Main Steam Line, Pre Heating The Msl Line For Valve Welding, Dpt, Radiography Testing The Weld Joints, Post Heating, Stress Relieving And Mounting The Actuators And Commissioning The Valve After Completion Of Works.Charges For Cutting Of Existing Mssv By Grinding, Edge Preparation Of Existing M.S Line & Valve. Including Consumables And Hire Charges For T&P’S. 7 Charges For Valve Positioning, Alignment & Fitting The Valve With M.S. Line. Including Consumables And Hire Charges For T&P’S. 8 Charges For Preheating The Welding Area Of Mssv Pipe Line With Mssv Valves. Including Consumables And Hire Charges For T&P’S. ( Heating Coils And Welding Transformer Are To Be Arranged By The Contractor ) 9 Charges For Stress Releaving The Welded Area Of The Line. Including Consumables And Hire Charges For T&P’S. 10 Overhauling Of Main Steam Stop Valve ( Mssv ) : Dismantling Of Heavy Size External & Internal Parts Of Main Steam Stop Valve ( Mssv ) And Actuator With Motor Assembly, Yoke Assembly, Gland Collar, Bonnet Clamp, Split Ring Assemblybonnet Assembly With Broken Stem, Valve Disc.Providing Chain Block Arrangement, Dismantling Of Electrical Actuator And Motor Assembly Of 350 Nb Mssv Valve By Loosening Of All Bolt And Nuts. Dismantling Of Yoke Assembly Of Valve By Loosening And Releasing Of Heavy Size 16 Nos Ht Bolt & Nuts. Using Chain Block Arrangement, Lead, Lift Of Material To 52 Mtr Elevation Of Boiler. Including Consumables And Hire Charges For T&P’S. 11 Dismantling Of Totally Gland Bolts And Gland Collar, Bonnet Clamp Bolts, Heavy Size Bonnet Clamp, Bonnetarrestting Split Rings By Using 7 Ton Capacity Chain Block Arrangement, Special Heavy Duty Fixtures And 2 X 100 Tons Capacity Hydraulic Jacks By Lifting , Lead, Lift Complete At 52 Mtr Elevation Of Boiler. Including Consumables And Hire Charges For T&P’S. 12 Dismantling Of Heavy Size Bonnet Assembly With Heavy Size Stem 100 Mm Dia X 2 Mtr Length With Valve Disc By Using 7 Tone Capacity Chain Block Arrangement, Special Heavy Duty Fixtures And 2 X 100 Tons Capacity Hydraulic Jacks By Lifting, Lead, Lift Complete At 52 Mtr Elevation Of Boiler. Including Consumables And Hire Charges For T&P’S. 13 Fabrication Of Special Type Heavy Duty Fixtures For Facilitating To Dismantle The Heavy Size Maín Steam Stop Valve Internals Such As Bonnet Clamp, Bonnet, Split Ring, Packing, Support Ring And Gate Disc.Fabrication Of Special Type Heavy Duty Fixture For Facilitating To Dismantle The Heavy Size Bonnet Clamp Of Main Steam Stop Valve From Valve Body By Insitue Fabrication Method. The Work Involves Transportting, Leading And Lifting Of Required Heavy Steel Materials From Store To 52 Metre Elevation Of Boiler, Designing Of Special Type Heavy Duty Fixture Based On Site Condition, Marking Of Fixture For The Designed Shape, Gas Cutting And Grinding Of Ms Materials, Welding Of Fixture To Match With The Site Condition To Facilate For Releasing Of Heavy Size Bonnet Clamp From Valve Body. Including Consumables And Hire Charges For T&P’S. 14 Fabrication Of Special Type Heavy Duty Fixture For Facilitating To Dismantle The Heavy Size Bonnet, Split Ring, Bonnet Packing Ring And Support Ring Assembly Of Heavy Size Main Steam Stop Valve From Valve Body By Insitue Fabrication Method. The Work Involves Transportting, Leading And Lifting Of Required Heavy Steel Materials From Store To 52 Meter Elevation Of Boiler, Designing Of Special Type Heavy Duty Fixture Based On Site Condition, Marking Of Fixture For The Designed Shape, Gas Cutting And Grinding Of Ms Materials, Welding Of Fixture To Match To Match With The Site Condition To Facilate For Releasing Of Heavy Size Bonnet, Split Ring, Bonnet Packing Ring And Support Ring Assembly From Valve Body. Including Consumables And Hire Charges For T&P’S. 15 Reassembling Of Overhauled, Rectified Heayy Size Internals Of Mssv Such As, Actuater With Motor Assembly, Yokel Assembly, Gland Coller, Bonnet Clamp, Split Ring Assembly, Bonnet Assembly, New Stem, Valve Disc. Overhauling And Rectification Of Mssv Internal Parts ( If Any ) , Lapping Of Seating Surfaces Of Valve Disc And Seating Ring With Coarse Particle Lapping Paste And Fine Particle Lapping Paste Compound Using Lapping Tool And Surface Plate, Blue Matching Of Valve Disc And Valve Seat Surfaces, Repeating Of Lapping And Blue Matching Process Till Achieving The Perfect Matching To Ensure Valve Sealing By Using 7 Tons Capacity Chain Block Arrangement Including Consumables, T&PS, Leading, Lifting And Assembling At 52 Mtr Elevation Of Boiler. 16 Re-Assembling Of Internal Parts Of Bonnet Assembly Such As Grafoil Gland Rings, Supporting Ring, Grafoil Gasket In The Bonnet Assembly Before Assembling The Bonnet Assembly In Side The Valve, Including Sheet Cutting Of Bonnet And Valve Body Maching Surface Area By Grinding, Buffing And Filling Etc., Assembling At 52 Mtr Elevation Of Boiler.Charges Including Consumable And Hire Charges For T & PS. 17 Reassembling Of Valve Internals Such As Gland Bolts , Bonnet Clamp Bolts, Bonnet Assembly, Ss Valve Stem ( Ø 100 Mm X 2 Mtr ) , Valve Disc- Having 450Mm Dia And Heavy Weight, Of 350 Nb Mssv Valve. Using Chain Block Arrangementafter Attending Defects And Aligning, Matching, Checking Seating Position Including , Leading, Lifting And Assembling At 52 Mtr Elevation Of Boiler, Consumable And Hire Charges For T & PS. 18 Re-Assembling Of Yoke Of 350 Nb Mssv Valves By Tightening Of Heavy Size- Ht Blolt & Nuts. Re-Assembling Of Electrical Actuator And Motor Assembly Of 350 Nb Mssv Valve By Tightening Of All Bolt And Nuts Using Chain Block Arrangement And Removing Chain Block Arrangement Including, Leading, Lifting And Assembling At 52 Mtr Elevation Of Boiler, Consumable And Hire Charges For T & PS. 19 Comissioning Of Rectified And Assembled Mssv By Manual Operation Of Full Open And Full Close And Adjusting Of Gland Packing Tightness And Adjusting Valve Stem Upper And Lower Travel Limit For Calibration Of Limit Switch Level , Retightining Of All Bonnet Bolts After Conducting Hudraulic Test And Again Tightening After Syncronising Of Unit At Hot Condition , Leading And Lifting Upto 52 Mtr Elevation Of Boiler. Charges Including Consumable And Hire Charges For T & PS. 20 Charges For Valve Actuators Mounting And Commissioning The Valve Operation. Including Consumable And Hire Charges For T & PS. 21 Removal Of Rust And Scale Formation Surface Cleaning And Two Coating Of Lumerous–Hr-47 Aluminum Painting On Hp & Lp, Mssv, 16M Valve Surface Area. ( Including Cost Of Aluminum Paint, Consumables And T&P, S Etc. ) 22 Charges For Over Hauling Of Beacon Rotark / Limitorque Actuator Model K-600 In Boiler Area By Leading, Lifting, Draining Oil, Dismantling, Cleaning, Checking Mechanical Operation Attending Minor Defects, Renewing Oil Seal, O Ring, Gasket Assembling.Charges Including Consumable And Hire Charges Fort & PS. 23 Overhauling Of Drum And Super Heater Safety Valves: This Work Comprises Of Dismantling, Cleaning, Lapping The Seat And Disc, Assembling Without Disturbing Its Initial Settings.Charges Including Consumable And Hire Charges For T & PS. ( Sv1, Sv2, Sv3 & Sv5 ) 24 Overhauling Of Rh Safety Valves: This Work Comprises Of Dismantling, Cleaning, Lapping The Seat And Disc Assembling Without Disturbing Its Initial Settings. Charges Including Consumable And Hire Charges Fort & PS. ( Sv7, Sv8, Sv9 & Sv10 ) 25 Charges For Overhauling Of Mssv Of Limitorque Actuator Model Smb 3 In 52 Mtr Of Boiler Area By Leading, Lifting Draining Oil, Dismantling, Cleaning, Checking Mechanicaloperation Attending Minor Defects, Renewing Oil Seal, O Ring, Gasket Assembling. Including Consumable And Hire Charges For T & PS. 26 Overhauling Of Electromatic Relief Valves ( Erv ) :A ) Main Valve: This Work Involves Dismantling, Inspection, Rectification Of Any Defects, Cleaning Lapping The Seat And Disc, Providing Hydro Test Plug And Assembling Without Disturbing Its Initial Settings Of Safety Valves And Assisting During Pressure Setting Safety Valves & Reconditioning Of Adjusting Ring Pin. Charges Inclusive Of Labours, T&P’S And Consumables, Such As Lapping Past, Emery Sheet, Gada Cloth Etc. 27 B ) Pilot Valve : This Work Involves Dismantling, Inspection, Rectification Of Any Defects, Cleaning Lapping The Seat And Disc, Providing Hydro Test Plug And Assembling Without Disturbing Its Initial Settings Of Safety Valves And Assisting During Pressure Setting Safety Valves & Reconditioning Of Adjusting Ring Pin. Charges Inclusive Of Labours, T&P’S And Consumables, Such As Lapping Past, Emery Sheet, Gada Cloth Etc 28 Charges For Leading, Lifting And Arranging Platform And Scaffolding Wherever Required In The Boiler And Dismantling After Completion Of Work. 29 Charges For Safety Valve Floating By Engaging Approved Agency Having Done Trevi Test, Adjusting The Valves For Required Pressure Setting And Producing The Certificate As Per Requirement. Including Charges For Test Kit, Consumables And T&PS 30 Charges For Removing And Assembling The Existing Burner Trip Valves ( Oil / Steam ) From The Respective Elevations For Valve Overhaul Works. 31 Charges For Dismantling Inspection, Rectification Of Defects If Any, Lapping Of Valves Seat, Disc & Re Assembling After Overhauling Of Vsl Type Burner Trip Valves, Making Leak Testing And Ready For Service. Charges Including Consumables And Hire Charges For T & PS.
