MTPS I TM Unit I to IV Attending Breakdown maintenance works of tube puncture and gasket renewal work in LP Heaters Gland coolers Main Ejectors and Inspection Identification of punctured Spiral coils and attending puncture in HPH 5 6 7

Amount

Puncture Attending works and Gasket renewal of LP Heater -2/3/4. a) Removing of water box and placing it on the repair bay.

b) Lifting of tube nest, placing it on the T.G. floor, inspection, cleaning of tube nest, shell and etc.

c) Preparation of gaskets for the tube nest, water box inlet and outlet pipe line flanges etc.

d) Providing new gaskets for the tube nest and placing the tube nest inside the shell.

e) Cleaning and checking of drip line Header Nozzle holes, Checking the tube nest for leak if any plugging of all punctured tubes, placing the water box on the tube nest and tightening of main flange, Condensate inlet and outlet flanges after providing new gaskets.

Puncture Attending works and Gasket renewal of Gland Cooler - 1/2 a) Removal of Water box, flange bolts and nuts, Condensate inlet and outlet flanges, lifting the water box, placing it on the floor and cleaning of all flange surfaces.

b) Lifting of tube nest, Placing it on the floor, inspection, cleaning of tube nest and hydraulic testing etc.

c) Providing new gasket, for the tube nest and placing the tube nest inside the shell

d) Placing the water box on the tube nest and tightening the main flange, Condensate inlet and outlet flanges after providing new gasket

Overhauling and Hydraulic testing and Re-assembling of Safety valve size 6”/8”/40/64 ATA Removing the safety Relief valve size 6”, 8” / 40, 64 ATA, Disassembling the Safety Relief Valve, cleaning all the parts of the SRV, checking the seating surfaces and Lapping the seat and disc for perfect blue matching. Setting the pressure for rated lifting the SRV with hydraulic pump. Reassembling the SRV with new inlet and outlet flange gaskets.

Overhauling Hydraulic test and Re- assembling of Safety valve of size 4”/2”/ 300 class. Removing the safety Relief valve Size 4’’, 2.5’’/ 339 Class from LP Heater, Gland cooler-I & Flange & Stud hea ting system Disassembling the Safety Relief Valve, cleaning all the parts of the SRV, checking the seating surfaces and Lapping the seat and disc for perfect blue matching. Setting the pressure for rated lifting the SRV with hydraulic pump. Reassembling the SRV with new inlet and outlet flange gaskets.

Inspection and Gasket Renewal of Main Ejector Disconnecting of all the steam pipe lines air lines and dismantling the nozzle box, Ejector shell, tube nest etc cleaning the tubes, water box, attending the tube puncture, setting and checking the nozzle gap, hydraulic testing of the tubes and assembling the ejector shell, tube nest, nozzle box, providing with new gasket connecting all the related pipe lines and overhauling of exit NRV and flow meter in main ejector as per direction of the Engineer

Removal of Stand pipe on LHS & RHS and placing it on the repair bay.

Heating and removing of main flange cap nuts and studs of HP Heater.

Gouging of main flange joint of HP Heater.

Disconnecting & Connecting air evacuation line flange and safety valve bottom drain line flange after cleaning and providing gaskets .

Lifting of HPH shell and placing it on TG floor after disconnecting flange joints and drain line pipe joints.

Special type Scaffolding arrangements for HP Heater to inspect the punctured Spiral Coils.

To carry out hydraulic test and checking of all the coils for leak if any.

Replacing the defective drain line valves or equivalent in Heater drip, Condenser air, Axillary steam and drain water lines etc by Non IBR welder.

Welding the shell side & bottom side metal seal main flange after placing shell on bottom Flange. This work involves preparing the ‘V’ groove for the top and bottom side main flange metal seal gasket and welding by Non IBR welder.(OD 2380 mm x 2250 mm x 6 mm thick). ( Standard joints = 63.5 mm x 5.2 mm)

Locating the punctured Spiral coil, cutting and removing the coil, providing the new coil by IBR welding and to carry out the hydraulic Testing .

Placing the HPH Shell on the bottom flange from TG floor (including Alignment of Top & Bottom metal seal gasket) and reconnecting the flange joints and drain line pipe joints.

Tightening of main flange bolts and nuts by gas heating.

Erection of stand pipes on LHS & RHS.

Champion Make Style – 54 Super Non-Metallic Compressed Asbestos fiber Jointing sheet confirm to IS 2712/1998, Grade W/1, Size 2000 x 1500 x 3mm gasket for main Condensate line valves, Heater drip, Auxiliary Steam Condensate Air and Auxiliary Cooling water line valves.

Champion Make Style – 54 Super Metallic Compressed Asbestos fiber Jointing sheet confirm to IS 2712/1998, Grade W/1, Size 2000 x 1500 x 4mm for CRH (L&R) Flanges & Dummy flanges

Cost of welding electrodes for Item Sl.No:12 Electrode : E7018 –A1 (ARC)

Charges for cutting gas

Consumables and Tools & Plants for item Sl.No: 1 to 25

TAM AND CO (BID ID -1307292)