tender for inspection and cleaning of boiler drum and overhauling of safety valves.; 1 overhaul of boiler drum internals, inspection of weld cracks in the separation chamber and welding with ibr welder if necessary, flushing of phosphate dosing and blow down lines. 2 rectification of boiler drum separators by reconditioning erosion/ crack, alignment of fins and replacing worn out mounting fasteners. 3 overhauling of safety valves in prds header, cbd expander and prds to foph, ms to prds safety valves. 4 overhauling of boiler drum and super heater safety valves. 5 overhauling of crh and hrh safety valves. 6 providing assistance during safety valves floating.