A simple predictive technique for heat transfer during film boiling in tubes is presented. This technique is based on the two-step model and consists of a graphic correlation for nonequilibrium quality and an equation for liquid droplet cooling at high pressures. It has been developed from and verified with data for water, nitrogen, para-hydrogen, R-113, methane, and propane. The range of data includes equilibrium qualities from 0.1 to 2.9, pressures from 1.4 to 215#xA0;bar, reduced pressures from 0.01 to 0.97, mass flux from 30 to 3442 kg/m2s, tube diameters from 2.5 to 14.9#xA0;mm, heat flux from 0.012 to 2.1 #x1E3E;W/m2, and wall temperatures from 81 to 1112#xA0;K. For all 722 data points analyzed, heat transfer coefficients based on actual vapor temperatures are correlated with a root-mean-square error of 15.
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