# Heat transfer coefficient of pipe wall (using wall thickness)

## Description

The resistance to the flow of heat by the material of pipe wall can be expressed as a “heat transfer coefficient of the pipe wall”. However, one needs to select if the heat flux is based on the pipe inner or the outer diameter. Selecting to base the heat flux on the pipe inner diameter, and assuming that the pipe wall thickness is small in comparison with the pipe inner diameter, then the heat transfer coefficient for the pipe wall can be calculated as if the wall were not curved.

Related formulas## Variables

h_{wall} | heat transfer coefficient (W/m^{2}*K) |

k | effective thermal conductivity of the wall material (W/m*K) |

x | wall thickness (m) |