renewal of gasket, at water box side, tube nest side, condensate inlet and outlet flange, inspection and cleaning of tube nest and hydraulic testing of lph-3 and 4, gc-1 and overhauling of safety relief valves in flange and stud heating and changing the defective / passing 1and2 drain line and vent line valves by cutting, welding by ibr and non ibr during boiler license renewal work 2020-21 .
