|
Bids Are invited for Custom Bid For Services - Insulation, Refractory Works, Removal Of Accumulated Fly Ash From Inside The Heating Surface And Other Areas Of Boiler And Their Disposal From Boiler And Rectification/Repairing Of Skin Casing During Overhauling Of Unit No 4 - Complete Insulation Of Pipelines, Pressure Parts Main Boier, Esp, Ducts And Other Associated Equipments Of 2X500 Mw Boiler When New Cladding To Be Provided With 20-24 Gauges (G.I.)/Aluminium Sheet Shall Be Provided By The Department Free Of Cost). Work Includes Fabrication And Fixing Of Cladding Structure One Layer Of Mineral Wool Blankets/Pads Or Calcium Silicate Pipe Section Of Thickness 40/50/60 Mm, Are Provided/Fixed At Site. , Complete Insulation Of Pipelines, Pressure Parts Main Boier, Esp, Ducts And Other Associated Equipments Of 2X500 Mw Boiler When New Cladding To Be Provided With 20-24 Gauges (G.I.)/Aluminium Sheet Shall Be Provided By The Department Free Of Cost). Work Includes Fabrication And Fixing Of Cladding Structure More Than One Layer Of Mineral Wool Blankets/Pads Or Calcium Silicate Pipe Section Of Thickness 40/50/60 Mm, Are Provided/Fixed At Site. , Complete Insulation Of Pipelines, Pressure Parts Main Boier, Esp, Ducts And Other Associated Equipments Of 2X500 Mw Boiler When Old/Removed Cladding Sheets To Be Fixed With The Help Of Self Tapping Screw, Complete Insulation Of Pipelines, Pressure Parts Main Boier, Esp, Ducts And Other Associated Equipments Of 2X500 Mw Boiler When One Layer Of Mineral Wool Blankets/Pads Or Calcium Silicate Pipe Section Of Thickness 40/50/60 Mm, Are Provided Or The Old/Removed But Usable Are Provided/Fixed At Site. , Complete Insulation Of Pipelines, Pressure Parts Main Boier, Esp, Ducts And Other Associated Equipments Of 2X500 Mw Boiler When Old/Removed Cladding To Be Provided With 20-24 Gauges (G.I.)/Aluminium Sheet Shall Be Provided By The Department Free Of Cost). Work Includes Fabrication And Fixing Of Cladding Structure More Than One Layer Of Mineral Wool Blankets/Pads Or Calcium Silicate Pipe Section Of Thickness 40/50/60 Mm, Are Provided Or The Old/Removed But Usable Are Provided/Fixed At Site. , Insulation Of Headers In Pent House/Outside, When More Than One Layer Of Mineral Wool/Blankets/Pads Of Thickness 40/50/60 Mm, Are Provided/Fixed On The Headers In Pent House. Work Involved Are As Under: (A) Dismantling Of Old Damaged Insulating Materials And Shifting The Same To Dumping Yard. (B) Transportation Of New Mineral Wool Blanket/Pads From Central Store To Site Store And Thereafter To 80Mtr. Of Boiler Elevation. (C) Fixing Of Mineral Wool Blankets/Pads And Stitching The Same With G.I. /M.S. /S.S. Wire Holding The Insulation Materials On The Header, Mineral Wool/Winding Wire Etc. Shall Be Provided By The Department Free Of Cost. , Application Of Mineral Wool Blankets/Pads And Fixing With G.I. Wire On H.P. /L.P. Valves Of Boiler. Application Of Insulating Powder, Hard Lag/ Mastic Compound & Finishing/Cladding With G.I./Aluminium Sheets Of 20-24 Gauge Wherever Required As Per Site Requirement Or As Instructed. , Application Of Castable Refractory In Main Boiler/ Pressure Parts Heating Zones. Work Involved Are As Under: (A) Removal Of Old And Damaged Refractory By Chipping Out, Collecting And Shifting The Same To Dumping Yard Or As Instructed. (B) Welding Of S.S. /M.S. Pegs Of Required Size For Reinforcement At Required Distance And Casting New Refractory. Manpower For Transportation The Refractory Materials From Central Stores To Work Site Shall Be Provided By The Contractor. , Application Of Plastic Refractory On Burner Panel Zone , Cleaning And Removal Of Fly Ash/Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From The Primary Super Heater Chamber Inside The Boiler. , Cleaning And Removal Of Fly Ash/Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Economizer Chamber Inside The Boiler , Cleaning And Removal Of Fly Ash/Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Gallery Between Re-Heaters And Arch Tube Inside The Boiler. , Cleaning And Removal Of Fly Ash/Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Gallery Between Re-Heaters And Arch Tube Inside The Boiler. , Cleaning And Removal Of Fly Ash/Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Gallery Between Tertiary Super Heater And Secondary Re-Heater In Pent House. . , Cleaning And Removal Of Fly Ash/Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Gallery Between Tertiary Super Heater And Secondary Re-Heater In Pent House. , Cleaning And Removal Of Fly Ash/Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Gallery Between Tertiary Re-Heater And Final Super Heater In Pent House. , Cleaning And Removal Of Fly Ash/Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Gallery Between Final Super Heater And Primary Super Heater Headers In Pent House. , Cleaning And Removal Of Fly Ash//Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Hot Secondary Air Duct From Aph To Wind Box (Left) , Cleaning And Removal Of Fly Ash//Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Hot Secondary Air Duct. From Aph To Wind Box (Right) , Cleaning And Removal Of Fly Ash//Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Boiler Furnace Wind Box (Left) , Cleaning And Removal Of Fly Ash//Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Boiler Furnace Wind Box (Right) , Cleaning And Removal Of Fly Ash//Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Interconnecting Duct Of Hot Secondary Air. , Cleaning And Removal Of Fly Ash//Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Inlet D Er To Outlet D Er Of Air And Flue Gas Duct Of Primary Aph Including Aph. , Cleaning And Removal Of Fly Ash//Foreign Materials/Debris Etc. And Their Disposal To Dumping Yard From Inlet D Er To Outlet D Er Of Air And Flue Gas Duct Of Secondary Aph Including Aph. , Cleaning And Removal Of Fly Ash/Foreign Materials/Debris/Garbage/Pigeon Shits Etc. From Pent House Roof Of Boiler By Sweeping With Hard Broom/Wire Brush And Their Disposal To Dumping Yard. , Cleaning/Sweeping And Removal Of Fly Ash/Foreign Materials/Debris/Garbage Etc. From Dog House Of Boiler And Their Disposal To Dumping Yard. , Cleaning And Removal Of Fly Ash/Foreign Materials/Debris/Garbage Etc. From S-Panel Of Boiler And Their Disposal To Dumping Yard. , Cleaning And Removal Of Fly Ash/Foreign Materials/Debris/Garbage/Pigeon Shits Etc. From Buck Stay Of First And Second Pass Of Boiler From 11Mtr To 80Mtr And Sweeping With Hard Broom/Wire Brush And Their Disposal To Dumping Yard. , Repairing /Replacement Of Bulged/Damaged Skin Casing At Different Section In Pent House 1St/2Nd Pass After Removal By Cutting And Releasing From High Crown Plates Expansion Bellows, Straightening And Refixing By High Pressure Welding In 2X500 Mw Boiler Of Btps, Anpara. Work Involved Are As Under: (A) Cutting Of Elephant Door At Boiler Drum Level In Pent House After Cutting Outer Cladding And Removal Of Insulation. (B) Cutting Of Bulged/Damaged Skin Casing Plates By Grinder/Gas Cutting Set With Utmost Precaution Ensuring No Damage To The Boiler Pressure Parts Tubes And Expansion Joints Inside The Pent House. (C) Removal Of Damaged Skin Casing After Cutting To Outside Pent House At Boiler Drum Floor. (D) Skin Casing To Be Cut In Full Segment Length, Not In Small Pieces. (E) Care Should Be Taken Of Expansion Joints, Pressure Parts Tubes Sling Holes Provided In Pent House For Sky Climber Rope, While Cutting The Damaged Skin Casing. (F) Straightening Of Damaged Skin Casing By Gas Heating Process And Pressing With Jacks/Hammers (G) Removal Of Refractory Beneath Skin Casing Above Roof Tubes For Inspection Of Peg Fins, Roof Tubes And High Crown. Any Defect Observed In Roof Tubes, High Crown Or Pendent Panels Should Be Identified And Got Inspected By The Engineer In-Charge. Repair Of Peg Fins And High Crown Should Be Carried Out By High Pressure Welding Strictly In Accordance To Ibr. (H) Providing New Refractory And Curing The Same, Allowing At Least 24 Hrs. To Set. (I) Welding Of Skin Casing And Sector Beam After Refractory Work Is Over. (J) Skin Casing Should Be Welded By High Pressure Sequence Welding Technique As Per Ibr With Supratherm (Spl) Electrode And Ensure To Be Leak Proof. (K) Closing Of Elephant Door By Welding After Completion Of Work.
|
