The analytical model for turbulent film boiling of subcooled liquid flowing along a horizontal plate, as presented in a previous paper [1], had been extended to cover successfully the case of subcooled liquid flowing in a horizontal flat duct [2]. It is now used to analyze the forced-flow turbulent film boiling of subcooled liquid flowing with high velocity in a circular tube. The corresponding mathematical description is given, and a semi-empirical heat transfer correlation thus derived is well verified by experimental data for subcooled deionized water flow under atmospheric pressure. The results are expected to be adaptable for practical heat transfer calculation of high-temperature quenching process for rolled metals.