Tender For Nctps Ii - M Ii - Tm Division - S.Dn.I - Unit- I - Overhauling, Servicing And Testing Of Main Turbine Governing Systems Hydraulic Accumulators In Control Fluid Oil Line Header Including The Cost Of Consumables And Hire Charges For T&Ps. Du
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Project Description
Tender for Nctps Ii - M Ii - Tm Division - S.Dn.I - Unit- I - Overhauling, Servicing And Testing Of Main Turbine Governing Systems Hydraulic Accumulators In Control Fluid Oil Line Header Including The Cost Of Consumables And Hire Charges For T&Ps. During The Unit-I Aoh Of The Year 2026-27
BOQ
| Sl. No. | Item Description |
| 1 | Disassembling of hydraulic accumulators from Main Turbine Governing system in Control fluid oil line header and lifting from oil header to Unit repair bayThe work involves complete releasing the pressure on the fluid side of the accumulator, removing of all pressurised lines on the fluid side, Dismantling of PRV in fluid side and Disassembling & Lifting the complete bladder assembly from the system to Unit repair bay |
| 2 | Dismantling of hydraulic accumulators completely and checking the condition of the Shell, bladder, Fluid port body, Anti-extrusion ring and other parts etc.,The work involves draining the remaining fluid in the accumulator after it is disconnected from the system, Unscrewing valve protection cap and cap nut, Releasing the nitrogen pressure using the charging and testing kit, Removing gas valve assembly using gas valve wrench, placing Accumulator on assembly bench, removing bleed adaptor and valve, loosening and unscrewing locking ring with a C-spannar, removing of bonded seal, O-ring, washer, back-up ring and anti-extrusion ring, Removing Fluid port body & bladder from the shell and Cleaning of all parts by solvent & Inspection of Shell, bladder, Fluid port body, Anti-extrusion ring and other parts. |
| 3 | Assembling of hydraulic accumulators with new/old bladderThe work involves Lubricating the inside of the shell and the outside of the bladder with clean system fluid, pulling the rod and bladder through the fluid port, Fold anti-extrusion ring slightly and insert it into the fluid port body, Assembly the oil valve through extrusion ring, installing the gas valve assembly using torque wrench, Assembling of bonded seal, seal kit (O-ring, washer, back-up ring etc.,) to the fluid port body, screw in bleed adaptor and valve in fluid port body and tightening securely with lock ring. |
| 4 | Placing of hydraulic accumulator to Control fluid Governing system, Fixing of all pressurised lines on the fluid side, Assembing of PRV in Fluid side and Filling and Checking of nitrogen gas into accumulator and commissioning of hydraulic accumulator ensuring smooth operation of the system. Please Enable Macros to View BoQ information |
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