بررسي و تحليل تاثير داغي كوتاه مدت در گسيختگي لوله هاي بويلر واحدهاي نيروگاهي

Investigation and Analysis of Short Overheat in Boiler Tube Failures in Power Plant Units

Boiler tube failures are the main cause of forced outages of power generating units and due to cost. Penalty is very high. Sources and reasons of tube failures are various, but it can be generally categorized by mechanical and Corrosion factors with 81% and 19% contributions, respectively. Among the mechanical factors short overheat has the major Contribution in waterwall and superheater tube, failure. In this paper short overheat mechanism (with appearance and metallurgical features) and its prevention method is over viewed.