Pipe Insulation Thickness Calculator

Per-metre heat loss is calculated from cylindrical conduction resistance ln(r₂/r₁)/(2πk) plus outside resistance 1/(h·2πr₂). The solver searches for the smallest thickness meeting the target.

Insulation conductivity changes with mean temperature, moisture, ageing and product density. Use manufacturer data for the expected service temperature.

For small cylinders, adding a thin insulation layer can initially increase outer area. Practical thickness selection must also consider personnel protection, condensation, fire, weather barriers and economic optimization.

No. Cold-service insulation requires vapour control and surface-temperature checks against dew point.

Only through the user-entered outside heat-transfer coefficient. For high-temperature or unusual-emissivity surfaces, calculate radiation separately or use a validated insulation program.

The solver returns a continuous value. Round upward to an available product thickness and recalculate with actual dimensions.