Calculators
Heat Tracing Design
Radial heat loss per foot for an insulated pipe under wind, required design watt density, and parallel self-regulating cable count and kW draw. Screening method only — final selection must match cable vendor T-limit and circuit-length tables.
Method: radial 1-D conduction through insulation in series with surface film, both on an outer-diameter basis. Wind correction: hw = 1 + 0.02·vwind,mph. References: ASTM C680; IEEE 515 (electric heat tracing); Chromalox / Thermon design guides. Always cross-check the circuit length against the vendor’s actual datasheet start-up current limits.
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