Tender For corrigendum : overhauling of boiler pressure parts, high pressure valves, burners, wind-box, restoration of dss assembly, revival or re-installation of ervs, revival of dummied reducers, restoration of sagged roof during forthcoming oh of unit 2, 2x600 mw rgtpp - overhauling of boiler pressure parts, high pressure valves, burners, wind-box, restoration of drip seal shield assembly, revival/re-installation of ervs, revival of dummied reducers in penthouse, restoration of sagged roof of penthouse and providing cup-lock scaffolding inside the furnace during forthcoming overhauling of unit # 2 of 2x600 mw, rgtpp, khedar, hisar.