The aromatics plant is an important downstream petrochemical unit that produces various aromatic hydrocarbons such as xylenes benzene and toluene which are the basic building blocks for production of polyester and polymers resulting in different consumer goods. The heart of aromatics plant is a licensed high performance Naphtha Reforming unit that operates at low pressure and high temperatures required to promote chemical reactions that improve aromatics production.To achieve the required heat there are 4no. of fired heaters with vertical “inverted U” type coil configuration that raise the feed naphtha temperature to around 545 Deg C. The radiant tubes of the heaters are of 9Cr-1Mo (ASTM A335 Gr P9) metallurgy with a maximum tube wall temperature of 652° C. The tubes are prone to excessive scaling due to high temperature oxidation and scale thickness of upto 2mm was found in the tubes. The problem arising due to scaling affect not only the mechanical integrity of the radiant tubes but also lead to multiple operational constraints.From integrity point of view scale being part of metal it is consuming the metal at a rate of 0.25mm/year. This was evident from the UT survey carried out on the tubes which revealed a minimum thickness of 4.6mm as against original thickness of 6.02mm. Secondly oxide scale being an insulator restricts the heat transfer across the tube and thus preventing to raise process fluid temperatures to the required levels. As a consequence with burners at full load the unit had to be operated at lower capacity by reducing flowrate of the process fluid. Moreover due to severe scaling it was not viable to run the unit continuously without taking a shutdown every quarter to clean off the scales. This resulted in further production and financial loss.Following a detailed root cause analysis it was recommended to apply ceramic coating on the radiant tube and extend it to refractory in the furnace box to improve operational and thermal efficiency while maintainingmetallurgical reliability and stability.The ceramic coating was expected to result in severaloperational benefits by creating a uniform heatingprofile along with reducing the diffusion mechanism of oxidation eliminating insulative (scale and oxide)surface layers that form during high temperature operation. Post coating (applied in March 2017) the unit is capable to run at more than 100% at the same heater load and also assurance of long term integrity of the heater tubes. The payback from the investment was within 6 months of project execution.This case study highlights the observations of the radiant tubes along with the cost benefit analysis achieved by the application of ceramic coatings to extend tube life and improve operational efficiency.Keywords: Naphtha Reforming Ceramic Coating Radiant Tubes Oxidation