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answered Mar 3 by sabdullayev (4,950 points) | selected Mar 30 by Tadd Pham
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Critical Exposure Temperature (CET) is defined as the lowest metal temperature derived from either the operating or atmospheric conditions.  The CET may be a single temperature at an operating pressure or an envelope of temperatures and pressures.  The CET is determined for different types of equipment including pressure vessels, piping and machinery as defined accordingly to the project.