Experiments were carried out for a premixed flame inside an adiabatic refractory tube. The temperature of the tube wall was found to play a critical role in stabilizing a flame inside the refractory tube without any flameholder. Preheating of the wall and good thermal insulation on its outer surface are pre-requisites for this behavior. The flame may be stabilized at both upstream and downstream locations for the same external conditions depending on the initial conditions. Dependence of the flame location on the mass flow rate of the fuel; the mass flow rate of the air and the tube length was studied experimentally. The results are in agreement with prior numerical predictions.