Pipe Thermal Insulation Thickness Calculation

Estimates heat loss from an insulated and bare horizontal steel pipe along with calculation of surface temperature.

Pipe thermal insulation thickness calculation.

The pipe size is 8 and the maximum allowable temperature of outer wall of insulation is 50 0 c. Data pipe size inch 0 5 0 75 1 1 25 1 5 2 2 5 3 3 5 4 5 6 8 10 12 14 16 18 20 24 26 28 30. δ t can be estimated from the historical data for temperatures in the region in which the tank is to be used. Input data includes the operating temperature the ambient conditions temperature relative humidity and wind speed and details about the insulation system material and jacketing.

Thermal conductivity of the insulation material for the temperature range of the pipe can be taken as 0 04 w m k. Hence insulation thickness ri rp 0 2302 0 1524 0 0777 insulation thickness 77 7 mm extra margin must be taken on insulation thickness as sometimes conducting heat transfer through insulation may become higher than convective heat transfer due to air on outside wall of insulation. This calculator estimates the thickness of insulation required to avoid condensation on the outer surface of an insulated horizontal steel pipe. Where δ t is the average difference between the internal and external temperatures in kelvin c1 is the thermal resistivity per unit thickness in kelvin meter per watt and t is the insulation thickness in meters.

The heat flow through pipe insulation with outer diameter doand inner diameter of the insulation equal to outer diameter of the pipe diis where is the length of the pipe kis the thermal conductivity of the insulation material and δtis the temperature difference between the inner and outer walls of the insulation. Calculate insulation thickness minimum value required for a pipe carrying steam at 180 0 c. To calculate the insulation thickness it is necessary to know or define the line and ambient temperatures and the relative humidity and to determine the thermal conductivity and heat transfer coefficient of both the insulation and the object pipe duct etc to be insulated. This very rigid insulation offers the lowest heat flow rate of our pipe insulation and restricts absorption of water air and gas.