tender for replacement of worn out ash pipeline and other miscellaneous works at obra thermal power station, obra, 1 marking and turning of ash disposal pipe line 5x200mw, btps from ash slurry pump house to chakari ash dam. 2 repairing/replacement of worn out coupling or collar or sleeves by new one or providing asbestos rope of required size in ash disposal line 12/14”/16. 3 generator charges beyond power house boundary on job (welding work or part of thereof). 4 to provide half stiffener on ash slurry disposal pipe line. 5 to provide full stiffener on ash slurry disposal pipe line. 6 fabrication of bend 22½o, 45o to 90o in round curved shape for smooth flow of ash slurry from 12/14 ers m.s pipe for ash disposal pipeline. erection and commissoning by coupling or welding the same in the ash disposal pipelines. 7 laying the 12/14”/16-erw ms pipe lines, bends, couplings etc on the pedestal and welding the joint after making v shape at joint with d&h make medio electrode. 8 dismantling the old & used 12/14”/16 ms pipe line & open the coupling, cutting the joint etc. safely and shift the same in the site store/scrap yard. 9 erection and commissioning of 12/14”/16-erw ms new or old & reusable pipe, bends, coupling etc. with good alignment and clamping too strong to carry ash slurry disposal at 06 to 08 kg./cm2 discharge pressure successfully along with transport the material from the site store/central store to working place. 10 in case the huge quantity of ash accumulated at esp floor the same shall be segregated & lifted by dumper/trolley to outside powerhouse boundary for its disposal of 5x200mw, btps. ( one dumper= two tractor trolley) 11 providing air vent at rakhi pulia in line no. 1, 2, 3 12 repairing/reconditioning of worn out trolley installed at rakhi pulia