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Chloride stress corrosion cracking (CSCC) of insulated pipe systems is discussed, and sources of chloride ions, moisture, and temperature increases in an industrial environment are considered. A recent CSCC failure of above-ground insulated austenitic stainless steel piping at the Department of Energy's Savannah River Plant (SRP) prompted investigation of the subject. Tests were run to establish pipe surface temperatures and temperature variations beneath thermal insulation during normal operation and under idle conditions. The effects of temperature on the pipe surface by sustained solar heating and unregulated electrical heat tracings were determined. The surface temperatures exceeded 54 deg C (130 deg F) on a sunny summer day. SRP design requires consideration of CSCC at 40 deg C (104 deg F), prompting the need for preventive methods to avoid failure above 40 deg C whenever stainless steel and chlorides occur simultaneously. Recommended preventive techniques are discussed. (ERA citation 11:025855)