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After two years of non-continuous service of three boilers, weld seams for the super heater and header tubes showed severe circumferential cracking and failure. Extensive cracking was noticed after emergency shutdown to investigate the cause of tubes leakage.On-site investigation revealed the fact that tubes were suffered from extensive circumferential cracking initiated at the weld heat affected...
Copper-based alloy tubes (i.e. Cu–Ni) are extensively used in desalination plants. This is in order to complete the heating and evaporating process for the seawater and to obtain distillate water that can be used in the steam generation plant and as drinking water. A number of these tubes were found to suffer from severe localized corrosion at 6 o’clock position (corrosion throughout the pipe wall...
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