Performance of Stainless Steel Tubes in Condensers Associated with Cooling Towers
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Bechtel Power Corporation has carried out two studies on steam plant surface condenser leakage for the Electric Power Research Institute. The report on the first study was issued in 1977 and the report on the second in 1981.
The results of the first study indicated that there was a greater than 90 pct probability that stainless steel tubes would provide a 40-year life with less than 2 pct of the tubes plugged in once through cooling systems utilizing fresh water. However, there was concern that this data might be misleading since severe corrosion had occurred on some tubes where failure rate data was not available.
The second study covered a larger sample of stainless steel condenser tubes but was limited to those operating on recirculating water cooled by cooling towers having fresh water makeup. The results indicated that Types 304 and 316 stainless steel condenser tubes perform well under these conditions with a greater than 90 pct probability that the tubes will provide a 40-year life with very few tubes, if any, having to be plugged because of corrosion.
KeywordsStainless Steel Tube Cooling Tower Cathodic Protection Electric Power Research Institute Condenser Tube
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