bids are invited for custom bid for services - removal of coil from shell and cleaning the coil with suitable acid , custom bid for services - ut thickness measurement of coil , custom bid for services - dp test of coil radiography of weld joints as directed by the ongc , custom bid for services - repairreplacement of 1 steam out let line ibr pipes working pressure 100 kg weld joints connections replacements size and length is to be confirmed from the site inspection , custom bid for services - servicing of 1 inch globe valve 25 nb ball valve feed check valve blow down valve main stop valve and 240x50 safety valve psv , custom bid for services - painting of coil with heat resistant paints , custom bid for services - box up hydrotesting commissioning of boiler and fitness certification by boiler inspector