Hunan Electric Power ›› 2020, Vol. 40 ›› Issue (4): 32-35.doi: 10.3969/j.issn.1008-0198.2020.04.007

• Faults and Analysis • Previous Articles     Next Articles

Cause Analysis and Solution Method of Welding Seam Leakage of Blocking Plate Valve for Boiler Main Stream Pipe

YONG Manjiang   

  1. Hunan Special Equipment Inspection and Testing Institute Xiangtan Branch, Xiangtan 411100, China
  • Received:2020-04-10 Online:2020-08-25 Published:2020-09-30

Abstract: The leakage of the welding seam welding the valve body for boiler main stream pipe valve and the transition stub happened in a certain power station. Based on visual inspection ,test of metallography, hardness and ultrasonic,and consulting manufacturing and installation data, the operating conditions are grasped,and the cracking causes of blocking plate welding seam are analyzed comprehensively.The on-site repair welding and replacement measures are taken to ensure the safe operation of the boiler.

Key words: boiler blocking plate valve, welding seam leakage, defect handling

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