tender for Breakdown maintenance and Cutting and welding work of hardware, fittings of isolating valves, impulse lines etc. of CI equipment’s in unit 5 and 6 2X250 MW CTPS Parichha Sl. No. Item Description 1 Replacement of damaged low pressure 20mm impulse line by cutting & welding with proper coupling, adopter, tail nipples, clamping & required bends of SS/CS. 2 Replacement of damaged low pressure 10mm impulse line by cutting & welding with proper coupling, adopter, tail nipples, clamping & required bends of SS/CS. 3 Replacement of damaged isolating valve for pressure, Temperature gauges & Switches, Transmitter, solenoid valve etc. 4 Revisioning & servicing of low-pressure isolating valve size 20mm by lapping, grinding & gland packing. 5 Fabrication & modification in end fittings of pressure, temperature gauges & switches, Transmitter, solenoid valve, transmitter manifolds, analyzers sample chamber. 6 Replacement of damaged low pressure 20mm sampling line of SWAS system by cutting & welding with proper coupling, adopter, tail nipples, clamping & required bends of SS/CS. 7 Laying, Tracing, Ferruling, dressing & Connection of 0.5&2.5mm2armored/un- armored control cable through racks:- 1.2 to 5 core 2. 6 to 11 core 3.12 to 30 core 4.Compensating cable armored/ un-armored screened for thermocouple. 8 Tracing of burnt section of damaged/ burnt cables, cutting & removing of burnt portion, jointing of new cables piece and testing of same after jointing:-1.2 to 5 core 2.6 to 11 core 3.12 to 30 core 9 Laying and fixing of cable trays of different type & sizes along with accessories, width up to 300mm. 10 Laying of multi-core control cable. 11 Tracing of burnt section of burnt cables, cutting & removing of burnt portion, jointing of new cables piece and testing of same after jointing of multi-core control cable. 12 Fabrication and modification of platform, structure, ladder etc. at various location as per requirement 13 Arresting the leakage from 10mm and 20mm impulse line by cutting and/or welding. 14 Replacement of damaged 10mm/20mm impulse line by cutting and/or welding with proper coupling, adopter tail nipples, clamping & required bends. 15 Replacement of damaged isolating valve for pressure/ Temperature gauges & Switches, instrument air/oil/steam line, transmitter etc. 16 Re-visioning & servicing of high pressure isolating valve size (0.5”, 1”and 2”) by lapping, grinding and replacement of gland packing. 17 Fabrication & modification in end fittings of pressure/ temperature gauges & switches, Transmitter, solenoid valve, transmitter manifolds. 18 Cutting and complete removal of old and damaged 5/3/2/ way H.P./L.P. manifolds of SS 316 from LIE panels. Cleaning, grinding of 10mm/20mm impulse line and welding of new/repaired 5/3/2/ way manifolds with the help of socket with suitable welding electrodes at two process connections. 19 Repairing of the old/defective 5/3/2 way manifold by cutting from site and dismantle/replace the stem/gland of the valve or welding of the defective body of the manifold. 20 Cutting and removal of odd size of female fittings of pressure gauges at different places of unit and auxillaries of 2x250 MW and replacement and welding of new female fittings. 21 Mounting/welding of snubber and isolating valves on high pressure line before pressure gauges for obtaining correct readings and improve the life of pressure gauges. 22 Repalcement of old and damaged hose pipe by cutting, welding and grinding flexible SS hose pipes (which are under division’s scope) installed at various locations of 2X250 MW units 23 Fabrication & modification of different sizes of links and other fittings of PFT and Positioners of various pnematic instruments installed at diffierent locations of 2X250 MW units. 24 Fabrication of canopy over junction boxes and open LIR PANELS SIZE: 3ft X 2ft.
