Steam flows through a pipe shown in Fig. 2-34 at an average temperature of Ts=200C. The inner and outer radii of the pipe are r1=8cm and r2= 8.5cm, respectively, and the outer surface of the pipe is heavily insulated. If the convection heat transfer coefficient on the inner surface of the pipe is h= 65W/m2K, express the boundary conditions on the inner and outer surfaces of the pipe during transient periods