IMPROVEMENT OF THERMAL CONDUCTIVITY OF P91 STEEL USING BORON NITRIDE COATING

P91 material has been used in Power Plant. It is also called 9 Cr 1 Mo steel, based on its composition. The oxidation temperature limits are higher. This allows the power plant designers to engineer components, super heater coils, headers and steam piping, with less thickness. P91 steel contributes to a higher thermal fatigue life of almost ten times. This allows them to increase the operating temperature to a higher level, increasing the efficiency of the power plant. Boron nitride coating is used to improve the thermal conductivity of the P91 pipe. The present study deals with comparison of P91 steel pipe with Boron Nitride and without Boron Nitride, and the Thermal Strain are to be analyzed in Engineering Workshops.