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THE FEUTEX TOOLKIT

Insulated Pipe Radial Heat Loss

Combine cylindrical insulation and external convection resistances.

Thermal workspace● Runs in your browser
01 Your input
02 Your result
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FormulaRcyl=ln(ro/ri)/(2πkL); Rfilm=1/(h2πroL).
Sources and model references

Worked example

Inputs

Insulation inner radius
0.025 m
Insulation outer radius
0.05 m
Pipe length
2 m
Insulation conductivity
0.04 W/(m·K)
External film coefficient
10 W/(m²·K)
Inner surface minus ambient temperature
60 K

Expected results

Total thermal resistance
1.538127444 K/W
Heat loss
39.00847113 W

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter every input in the labeled units; use measured or independently specified properties.
  2. Check the stated model assumptions before calculating.
  3. Interpret the output as a model estimate and verify it independently for the intended application.

Try this example

{
  "inner": 0.025,
  "outer": 0.05,
  "length": 2,
  "k": 0.04,
  "h": 10,
  "delta": 60
}

Accuracy and scope

Steady radial conduction; specified inner surface temperature, no radiation or end loss. Educational engineering estimate only; not structural or safety certification, equipment selection, or operating recommendations.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.