New Rlng Pre-Heater - Erection Of Exchangers, Supply, Fabrication, Erection, Insulation, Painting And Testing Of Piping For The Exchanger, As Per Tender Conditions. New Rlng Pre-Heater - Erection Of Exchangers, Supply, Fabrication, Erection, Insulation, Painting And Testing Of Piping For The Exchanger.