MTPS I TM Unit IV Inspection and Rectification of feed water pressure drop across HPH 5 by releasing the drain cooling zone and condensing zone spiral coils 261 Nos complete cleaning of the sediments foreign materials in spiral coils

Amount

Charges for removal of insula tion and providing re-insulation to HPH-5. This work involves removing the insulation around the flange and providing Re-insulation.

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 -5 .

Gouging of main flange joint of HP Heater-5.

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.

Cutting and removing the chocked coil, welding the spare coils by IBR welding, grinding the cutting area and welding the existing second hand coils with IBR welder etc Locating the punctured coil, cutting and removing the coil, providing the new coil by IBR welding and to carry out the Hydraulic Testing .

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

Placing the HPH-5 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

Replacing the defective drain line valves or equivalent in Heater drip, Condenser air, Axillary steam and drain water lines etc by Non IBR welder. Rate for Two number Non IBR cutting and welding. Cutting and welding of shrouded plates in Drain Cooling Zone- 4 Nos and De Superheating zone 1No by cutting and welding by Non – IBR Welder for removing the existing coil as carried out for Replacement of Valves, Pipes, Stubs, Bends and Reducers by Non IBR Welding Works.

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)

Tightening of main flange bolts and nuts by gas heating .

Erection of stand pipe on LHS & RHS

NELLAI ENTERPRISES