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 attending defects in regenerative system as and when required basis for a period of one year

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

Consumables and Tools & Plants for item Sl.No: 1 to 12

TAM AND CO