MTPS I BM Unit II Boiler Pressure Parts AOH 2020 Overhauling of HP LP valves and replacement of defective valves

Amount

Charges for overhauling of valves including dismantling, inspection, rectification, lapping of valve seat and disc, renewal of sealing rings, gland packing etc. cleaning, freeing of all fasteners, inspection of drive bush, bearings, etc. and renewing if necessary, assembling the valve & actuators and commissioning. A. Main steam stop valve and 300/250 valve.

B. Valve of sizes 150/250, 100/250 and 65/250

C. Valve of sizes 250/40, 200/40, 150/40 & 100/40.

D. 40 mm to 50 mm valves

E. 15 mm to 25 mm valves

Charges for overhauling of Thermal drains, WWSB Line, APH SB line control valves, RH/ SH spray control valves including dismantling, inspection, lapping of valve seat and disc, renewal of spiral wound gasket and gland packing etc. cleaning, freeing of all fasteners and renewing if necessary, assembling the valve

Charges for transportation of new/ reconditioned valves from stores to Boiler site, cutting the damaged valve and fixing the new valve in position. A. Valves of size up to 25 mm

B. Valves of size 40 mm to 50 mm

Charges for cutting of 65/250 size valve due to passing in various system of boiler includes the charges for transportation of new valve from central stores, cutting the existing valve, edge preparation, positioning the new valve and welding with IBR quality welder including all consumables and T&P’s etc

Charges for cutting the damaged 100/250 size of start-up vent valves, edge preparation, transportation of new valves from stores, removal & refixing the valve in position and provide support for the line, welding with IBR quality welder. Preheating and stress relieving for the joints A.Charges for transporting 100/250 size of valves from central stores to boiler area

B.Charges for removing insulation on both sides of 100/250 size valve and to provide support pipe for the line and also for reinsulation

C.Charges for cutting the both sides, edge preparation and for LPI inspection

D.Charges for fixing the new 100/250 valve in position

E.Charges for welding the valve in both sides of 100/250 valve

F.Dismantling of new 100/250 size valve to facilitate for welding the valve, assembling the valve after welding work and charges for lapping work

Champion Style-54 Super metallic Compressed Asbestos Fibre joining sheet to with stand Temp 600° C, Pressure 160 kg/cm2. IS 2712/1998/Grade W1 Size – 2000mm x 1500mm x 3 mm thickness

Soft Iron self Sealing ring withstand 250Ksc and Temperature 600 0C size:380x330X50 and 600 suitable for unit-II Main steam stop valve.

Soft Iron self Sealing ring withstand 250Ksc and Temperature 600 0C size:390x312X50 and 600 suitable for unit-II E1 NRV

Pure Graphite self Sealing ring withstand 250Ksc and Temperature 600 0C size:330x264X40 and 450 suitable for unit-II E2&FW Isolation valve

Pure Graphite self Sealing ring withstand 250Ksc and Temperature 600 0C size:125x100x18 suitable for unit-II 65/250 valve.

Pure Graphite self Sealing ring withstand 250Ksc and Temperature 600 0C size:150x120x20 suitable for unit-II 100/250 valve.

Spiral wound gasket SS 304 filled with Asbestos/ grafoil Size:380x340x3.2mm for HFO Filter

Pure graphite gland packing ring of min 99.5% carbon to withstand pressure of 250Ksc and temperature 600 C suitable for Unit-II 65/250 valve size:48X32X8mm

Pure graphite gland packing ring of min 99.5% carbon to withstand pressure of 250Ksc and temperature 600 C suitable for 2” &1½ ‘’ valve size :55.6X27X13

Pure graphite gland packing ring of min 99.5% carbon to withstand pressure of 250Ksc and temperature 600 C suitable for 1” valve size 41.3X17.2X12