Name of Work: Servicing of Relief Valves, NRVs and assistance for testing of boiler system in SA Plant during ATA-2025
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Item Description
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Servicing of Relief Valves, NRVs and assistance for testing of boiler system in SA Plant during ATA-2025
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Dismantling and Refixing of Valves Dismantling of the following valves from position, transport the valves to the workshop, fixing back in the system with new gasket, bolt-nuts etc.The number of valves dismantled will be as per the request from process department duly forwarded through mechanical maintenance department.1. Startup steam NRV 200 NB - 1 No.2. Super heater NRV - 1 No. 3. Steam vent line Isolation valve 200 NB - 2 Nos.4. Start up I/V 200 NB - 1 No.5. Boiler feed water NRV and Isolation valve each 80 NB- 2 Nos.(Temporary blinds shall be provided wherever necessary)
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Dismantling and Refixing of Relief Valves and Steam Valves.Dismantling relief / safety valves of various vessels from position, transport the valves to work shop for reconditioning / testing and transport back, fixing in position with new gaskets, bolts nuts / studs etc. The number of valves dismantled will be as per the request from process department duly forwarded through mechanical maintenance department. List ofvalves :HP:- W4outlet-2, W6 outlet-2, Steam drum-2, Rv-6 Ph-1 Header- 1, super heater outlet- 2MP:- RV1 8ATA header-1, RV3 8ATA melter –1, RV2 NPK 5 ATA-1,LP:-De-aerator –1, MAB exhaust –2, BFW turbine exhaust –1, 4ATA melter-1
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Testing of Boiler Systems: After getting clearence open the steam drum for cleaning and box up with proper gaskets after cleaning/ inspection.Transport hydro testing pump from the storage location, blind the required numbers of flanges,remove the required number of valves from the system,line up the pump with the boiler system, provide man power assistance for testing the system, remove the blinds after testing, refix the valves with proper gaskets / bolts and nuts, box up the flanges, dismantle and transport the testing pump to the storage location.
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