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October 16, 2018

No. 58 Correctly Size Condensate Lines

Best Practice No. 58 How to Correctly Size Condensate Lines to Ensure Proper System Operation1. SIZING CONDENSATE LINES Sizing condensate lines is very different from sizing any other fluid-conveying pipes. A high percentage of the time, the condensate header or line contains a two-phase flow, which is the condensate (liquid) and steam (flash or blowthrough steam from failed steam traps). If the condensate line is operating with two-phase flow and the condensate line is sized just for the liquid flow, then the condensate line will be undersized. The condensate line undersizing has significant end results: poor process performance and operation, water hammer, and component failures.

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