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Tender For the scope of work covers perform visual and dimensional inspections of runner, buckets, splitters, and needle impact zones. map and quantify erosion depth, especially on bucket edges, splitter, and cutout. the defects /cracks noticed during dpt (die penetrate test) and ultrasonic test (ut) will be provided and following observations have been noticed. erosions, material wear out and porosity noticed at leading edges, splitter tips, and bucket surfaces. cavitations damages, pitting, surface degradation has been observed in all runner buckets around the splitter leading to material loss at the splitter. cracks have been observed at back of the several runner buckets around splitter and its tips areas. due to cumulative wear, pitting and erosions surface roughness observed. compare worn surfaces to ideal profiles, calculate material to rebuild. material of construction (moc) details of pelton runner to be carried out at certified material testing laboratory or at cmti, bangalore. welding electrode suitable for moc of pelton runner shall be selected. the compatibility certificate for selection of welding electrode from welding electrode manufacturer shall be furnished. material build-up via welding includes deposit weld material to rebuild worn bucket edges, cutouts, and splitters. pre-clean the surface thoroughly to remove contaminants and moisture. preheat the component to specified temperature, and weld with controlled parameters to minimize residual stress and avoid cracking. maintain uniform temperature during welding to prevent residual stress formation and porosity. use filler materials compatible with the base metal as per the moc of pelton runner for enhanced fatigue and erosion resilience. use thermocouples to ensure uniform heating and cooling within limits to avoid unwanted microstructural changes. machining, grinding & polishing after welding, perform milling, grinding and polishing to restore hydrodynamic shape and surface finish for optimal flow and efficiency. after rectifications works, the firm shall conduct pelton runner dpt & ut testing and submit report. the work shall be carried out diligently and as per site requirement. in the event of any dispute, the decision of the engineer in charge of the work shall be final and binding. detailed technical specifications and scope of work/supplies are furnished in section-iii of bid document attached in the e-portal.
Tender For supply of earthing and lightning protection materials d d 0 65x8 galvanized ms flat , 50x6 galvanized ms flat , 25x6 galvanized ms flat , 25x3 galvanized ms flat , 8 swg gs wire , 40mm dia, 3mtr long ms rod earth electrodes pointed at one end , electronic earth pit as per sl no 7 of annexure 1 to technical specification no is-1-23- 2001-021 , treated earth pit as per sl no 8 of annexure 1 to technical specification no is-1-23-2001-021 , test earth pit as per sl no 9 of annexure 1 to technical specification no is- 1-23-2001-021 , flexible copper braided conductor -75x600 mm with mounting and connecting accessories , galvanised ms rod vertical conductor as per sl no 11 of annexure 1 to technical specification no is-1-23-2001-021 , test link with box- test link should be suitable for material size 25x6mm, complete with mounting hardware , clamp for fixing 25x6 gs flat along with necessary hardware. , 40mm dia ms rod , 50 nb galvanised ms perforated pipe 3mtr long pipe , ismc 100 , ismc 150 , total freight charges for complete scope of supplies
Tender For supply, installation, testing, commissioning, replacement and retrofitting of 04 nos. 25hp, 415 v, 3 phase, 50hz fully automatic soft starter units for governor oil pump motors with over current, short circuit, phase loss, phase reversal, locked rotor protection along with associated contactors and components without altering the existing wiring scheme, with all the existing interlocks, protections and commissioning of the system at work site. the 25hp drive used in soft starters shall be of make abb/ siemens / schneider with 25hp drive of model pstx45-600-70 or equivalent and the supplied model should have interchangeability of parts and easy inventory management so as to suit the existing governor oil pump starter panels. since, the existing old star delta panels installed at sgs are equipped with contactors, fuses, isolator switching units and the same need to be replaced and retrofitted. the complete work will be given on turnkey basis and all incidental works to carry out the retrofitting work of automatic soft starter panel with the existing wiring scheme are automatically covered in the scope of work. it is contactors responsibility to visit the site, note the quantity of work, all the incidental materials and consumables required to complete the work and submit the detailed drawing. detailed technical specifications and scope of work/supplies are furnished in section-iii of bid document attached in the e - portal.