Heat Trace Design Guide - ARCO Engineering

Chromalox PRECISION HEAT AND CONTROLE lectrical Heat Tracing SystemsDesign GuideCONTENTSINTRODUCTIONThis Design Guide provides a step-by-stepapproach for the Design , specification, and selec-tion of a bill of materials for an electric heat tracing system. Electric heat tracing systems aredesigned to make up for the heat lost fromprocess system equipmentthrough the thermal some cases, the heat tracingsystem can be used for systemheat-up at initial startup or after apower information in this Design Guide will allow theuser to Design , specify, and select a complete bill ofmaterials for freeze protection or process mainte-nance applications for a piping system or tank.

Find QP in Table 1 (page 2) for the nominal pipe size and insulation thickness based on ΔT. For example, for a 3" (76 mm) pipe with 2" (51 mm) insulation and ΔT = 60ºF (33.3ºC), the value for QP is 5.5 W/ft (10.8 W/m). THERMAL DESIGN- PIPES Step 3.Adjust for Insulation Table 1 (page 2) is based on ASTM C547 Fiberglas® insulation.

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  Pipe, Fiberglas

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