STEP 2 Determine insulation thickness tk

using Section 15.4, you can determine the insulation thickness according to your specific needs. Depending on the pipe diameter and temperature, the first inch of insulation can reduce bare surface heat losses by approximately 85-95% (Ref. 20). Then, for a preliminary economic evaluation, you can use tk = 1-in. If the evaluation is not favorable, you will not be able to justify a thicker insulation. on the other hand, if the evaluation is favorable, you will need to determine the appropriate insulation thickness and reevaluate the investment.

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