The temperature graphs calculated by two different cooling pipe heat conduction calculation models are compared with different cooling times and different thermal adiabatic temperature rise rates. Some conclusions are obtained as follows：(1) As the distance between the node and the pipe increases, the relation of node temperature calculated by cooling pipe FEM model and cooling pipe equivalent model shows that former is smaller than the latter, then after, the former bigger than the latter, and the former is equal to the latter at? the distance of 0.6 m; (2) As the thermal insulation rate reduces, the period, in which the temperature approaches to be equal, calculated by coolingpipe FEM model, and cooling pipe equivalent model, becomes longer, but the temperature will be equal after 7d by the two calculated model when the water is stopped to pass.