Miscellaneous works related to furnaces, RLA study, Downcomer pipes renewal and Economiser I replacement in SO2 Acid Plant and Statutory license renewal of boilers in SO2 and DCDA Acid Plants during ATA 2026.

Cutting of manholes/dummies on the following flue gas sides for inspection & cleaning and welding them back ensuring 100% leak proof in SO2 Acid Plant during ATA 2026: a) HE-1 inlet chamber dummy at west side b) HE-1 outlet chamber dummy at north side c) HE-2 inlet chamber dummy at east side d) HE-2 outlet chamber window cutting at west side Material : CS

Opening & closing of manhole dummies, hand hole dummies, isolation valves, etc. of HE-1 & HE-2 boilers for the purpose of cleaning, inspection, hydrotesting & conducting RLA study in SO2 Acid Plant during ATA 2026. All isolation valves, instruments, etc. shall be removed, shifted to ground floor & fixed back after servicing. Replacement of any damaged/passing valves shall be under the scope of the contractor. Valve servicing shall be under the scope of FACT. (Rate shall be quoted per boiler)

Opening & closing of manhole dummies, isolation valves, relief valves, level gauges, transmitters, pressure gauges, etc. of common steam drum for the purpose of cleaning, inspection & hydrotesting in SO2 Acid Plant during ATA 2026. All isolation valves, crown valves, relief valves, instruments, etc. shall be removed, shifted to ground floor & fixed back after servicing. Replacement of any damaged/passing valves shall be under the scope of the contractor. Valve servicing shall be under the scope of FACT. (Rate shall be quoted per steam drum)

Opening & closing of manhole dummies, isolation valves, relief valves etc. of Economiser-1, Economiser-2 & Economiser-3 for the purpose of cleaning, inspection, hydrotesting & conducting RLA study in SO2 Acid Plant during ATA 2026. All isolation valves, relief valves, etc. shall be removed, shifted to ground floor & fixed back after servicing. Replacement of any damaged/passing valves shall be under the scope of the contractor. Valve servicing shall be under the scope of FACT. (Rate shall be quoted per Economiser)

Opening & closing of manhole dummies, isolation valves, relief valves etc. of Superheater for the purpose of cleaning, inspection, hydrotesting & conducting RLA study in SO2 Acid Plant during ATA 2026. All isolation valves, relief valves, etc. shall be removed, shifted to ground floor & fixed back after servicing. Replacement of any damaged/passing valves shall be under the scope of the contractor. Valve servicing shall be under the scope of FACT. (Rate shall be quoted per Superheater)

Removal & fixing of steam drum internals such as separators, mist pads etc. in SO2 Acid Plant during ATA 2026.

Internal surface tube cleaning of HE-1 & HE-2 boiler to the satisfaction of Statutory authorities in SO2 Acid Plant during ATA 2026. All accessories such as wire brushes, waste clothes etc. required for cleaning shall be under the scope of the contractor. (Rate shall be quoted per tube)

External surface tube cleaning of entire boiler system on all accessible areas, complete cleaning of boiler drum, complete cleaning of flue gas inlet & outlet chambers of Furnace, HE-1, HE-2, Superheater & all Economisers to the satisfaction of Statutory authorities in SO2 Acid Plant during ATA 2026. All accessories such as wire brushes, waste clothes etc. required for cleaning shall be under the scope of the contractor.

Necessary assistance in conducting hydrotest of the boilers and connected pipelines by providing dummies / slip plates on all flange mountings for hydrotest and removing the same after successful completion of testing, rectify leak of flange joints, valves gland etc. in SO2 Acid Plant during ATA 2026.

Necessary assistance in conducting RLA study of the boilers and connected pipelines such as grinding at the areas specified by the RLA team etc. in SO2 Acid Plant during ATA 2026.

Replacement of expansion bellow in the Super heater steam coil after getting necessary IBR approvals /clearance etc. (Rate shall be quoted per expansion bellow) Size - 200NB Material - SS 321

Fabrication & welding of Downcomer pipes D1,D2,D3 & D5 of HE-1 & HE-2 boiler by TIG welding with Argon gas shielding as per IBR procedures during SO2 ATA 2026. (Rate for finishing one inch dia. of pipe by TIG welding) Downcomers D1 & D2 - 150NB Downcomers D3 & D5 - 100NB Pipe Material - ASTM A106 Gr B SCH 40

Erection of Downcomer pipes D1,D2,D3 & D5 of HE-1 & HE-2 boiler during SO2 ATA 2026. (Rate for erecting one inch meter of pipe) Downcomers D1 & D2 - 150NB Downcomers D3 & D5 - 100NB Pipe Material - ASTM A106 Gr B SCH 40

Dismantling of Downcomer pipes D1,D2,D3 & D5 of HE-1 & HE-2 boiler during SO2 ATA 2026. (Rate for dismantling one inch meter of pipe) Downcomers D1 & D2 - 150NB Downcomers D3 & D5 - 100NB Pipe Material - ASTM A106 Gr B SCH 40

Radiography of 100% joints of Downcomer pipes as per the instruction of Site Engineer.(Rate for executing radiography per inch dia.)

Cutting of manholes/dummies on the following areas for inspection & cleaning and welding them back ensuring 100% leak proof in DCDA Acid Plant during ATA 2026: a) DCDA Furnace dummy at east side b) No : 3 Boiler flue gas side dummies at west side (02 Nos) Material : CS

Opening & closing of manhole dummies, mud drums, isolation valves etc. of No 1 boiler & No 2 boiler for the purpose of cleaning, inspection & hydrotesting in DCDA Acid Plant during ATA 2026. All isolation valves, instruments etc. shall be removed, shifted to ground floor & fixed back after servicing. Replacement of any damaged/passing valves shall be under the scope of the contractor. Valve servicing shall be under the scope of FACT. (Rate shall be quoted per boiler)

Opening & closing of manhole dummies, isolation valves, relief valves, level gauges, transmitters, pressure gauges, etc. of common steam drum of No 1 & No 2 boiler for the purpose of cleaning, inspection & hydrotesting in DCDA Acid Plant during ATA 2026. All isolation valves, crown valves, relief valves, instruments, etc. shall be removed, shifted to ground floor & fixed back after servicing. Replacement of any damaged/passing valves shall be under the scope of the contractor. Valve servicing shall be under the scope of FACT. (Rate shall be quoted per steam drum)

Opening & closing of manhole dummies, hand hole dummies, isolation valves, etc. of No 3 boiler for the purpose of cleaning, inspection & hydrotesting in DCDA Acid Plant during ATA 2026. All isolation valves, instruments, etc. shall be removed, shifted to ground floor & fixed back after servicing. Replacement of any damaged/passing valves shall be under the scope of the contractor. Valve servicing shall be under the scope of FACT. (Rate shall be quoted per boiler)

Opening & closing of manhole dummies, isolation valves, relief valves, level gauges, transmitters, pressure gauges, etc. of No 3 boiler steam drum for the purpose of cleaning, inspection & hydrotesting in DCDA Acid Plant during ATA 2026. All isolation valves, crown valves, relief valves, instruments, etc. shall be removed, shifted to ground floor & fixed back after servicing. Replacement of any damaged/passing valves shall be under the scope of the contractor. Valve servicing shall be under the scope of FACT. (Rate shall be quoted per steam drum)

Opening & closing of manhole dummies, mud drums, isolation valves, relief valves etc. of Economiser for the purpose of cleaning, inspection & hydrotesting in DCDA Acid Plant during ATA 2026. All isolation valves, relief valves, etc. shall be removed, shifted to ground floor & fixed back after servicing. Replacement of any damaged/passing valves shall be under the scope of the contractor. Valve servicing shall be under the scope of FACT. (Rate shall be quoted per Economiser)

Removal & fixing of No 1&2 and No 3 boiler steam drum internals such as separators, mist pads etc. in DCDA Acid Plant during ATA 2026. (Rate shall be quoted per steam drum)

Internal surface tube cleaning of No 3 boiler to the satisfaction of Statutory authorities in DCDA Acid Plant during ATA 2026. All accessories such as wire brushes, waste clothes etc. required for cleaning shall be under the scope of the contractor. (Rate shall be quoted per tube)

External surface tube cleaning of entire boiler system on all accessible areas, complete cleaning of boiler drums & mud drums, complete cleaning of flue gas inlet & outlet chambers of Furnace, all three boilers & Economiser to the satisfaction of Statutory authorities in DCDA Acid Plant during ATA 2026. All accessories such as wire brushes, waste clothes etc. required for cleaning shall be under the scope of the contractor.

Necessary assistance in conducting hydrotest of the boilers and connected pipelines by providing dummies / slip plates on all flange mountings for hydrotest and removing the same after successful completion of testing, rectify leak of flange joints, valves gland etc. in DCDA Acid Plant during ATA 2026.

Loading of newly fabricated Economiser-I (approximate weight around 35 Tonnes) onto the contractor arranged truck/trailer at FEW using suitable crane with sufficient capacity. FACT will not provide any heavy equipment for this work.

Arranging suitable heavy duty multi axle truck/trailer and transporting of the loaded Economiser-I from FEW to SO2 Acid Plant, FACT - UC during ATA 2026. Weighment of transportation vehicle shall be conducted both before and after loading Economiser-I, using a properly calibrated weighbridge, prior to entry into the company premises. For arranging suitable truck/trailer, overall dimension of the Economiser-I can be referred from Drg No: 1715596 attached. FACT will not provide any heavy equipment for this work.

Disconnection of steam inlet & outlet headers, cutting of SO2 gas inlet & outlet ducts, dismantling of fouling structural for lifting of the Economiser-I in SO2 Acid Plant, FACT-UC during SO2 ATA 2026. Steam inlet & outlet header flange size - 80NB SO2 gas inlet & outlet duct size - 900NB FACT will not provide any heavy equipment for this work.

Removal of existing Economiser-I from the site and transportation of the same to material conservation yard or any prescribed location inside the company premises using suitable crane with sufficient capacity during SO2 ATA 2026. FACT will not provide any heavy equipment for this work

Unloading & erection of newly fabricated Economiser-I using suitable crane with sufficient capacity at SO2 Acid Plant, FACT-UC during SO2 ATA 2026. FACT will not provide any heavy equipment for this work.

Hooking up of newly fabricated Economiser-I and refixing the dismantled structural using suitable crane with sufficient capacity at SO2 Acid Plant, FACT-UC during SO2 ATA 2026. Steam inlet & outlet header flange size - 80NB SO2 gas inlet & outlet duct size - 900NB FACT will not provide any heavy equipment for this work.

Providing 900NB flange joint on Economiser-I inlet duct and welding of necessary nipples & fittings on the Economiser-I inlet & outlet ducts for nitrogen filling at SO2 Acid Plant, FACT-UC during SO2 ATA 2026. SO2 gas inlet & outlet duct size - 900NB FACT will not provide any heavy equipment for this work.

Slip Plating of Economiser-I inlet & outlet ducts for Nitrogen preservation at SO2 Acid Plant, FACT-UC during SO2 ATA 2026. SO2 gas inlet & outlet duct size - 900NB FACT will not provide any heavy equipment for this work

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