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Analysis on Causes of SUS304HTB Boiler Tubes Explosion in Zhanjang Power Plant

Wu Mingsheng 1,Xu Chunyi 1,Ju Zhengfu 2 (1.Guangdong Ganjiang Power Plant,Ganjiang,524099;2.Electric Power Consturction Research Institute,State Power Corporation,Beijing,102401) [  
Through macro and microstructure analysis for whole-wall superheater explosion tubes of No.1 boiler in Zhanjiang Power Plant it is discovered that SUS304HTB clamping tubes explosion is due to serious quality problem in the course of tubes bending fabrication,steam polluted by the sea water during operation,which caused the austenic stainless steel to the sensitized state intergranular stress corrosive crack. [
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