Internal Fluid Temperature Change Along a Pipe (Steady External Temperature)

These calculations run in your web browser, using embedded Javascripts; which means that you must set your browser to allow Javascripts .

  • Take care with the units of Cp
  • Diameter and length are in millimeters (not meters).
  • Heat transfer will be negative when the fluid is cooled as it travels along the pipe.
  • Pipe overall U may be calculated here.
  • Internal flow convection H is assumed included in pipe overall U.
  • Mass flow rate is not used to calculate internal flow convection H.
  • The graph is illustrative only.... it is not tied to the calculation.


    • Input
    T(external) (deg C)
    T(fluid in) (deg C)
    Pipe wall U (W / m2 / deg K)
    Pipe inner Dia (mm)
    Pipe Length (mm)
    Mass flow (kg/s)
    Fluid Cp (kJ / Kg / deg K)
    T(fluid out) (deg C)
    Heat Transfer (W)