焊管2025，Vol.48Issue(3)：68-72,5.DOI:10.19291/j.cnki.1001-3938.2025.03.011
焊接式法兰截止阀阀体裂纹失效分析
Failure Analysis of Welded Flange Cut-off Valve Body Crack
李冬 1郭雷 1郭磊 1许彦 1刘迎来 1吴金辉1
作者信息
- 1. 中国石油集团工程材料研究院有限公司,西安 710077||北京隆盛泰科石油管科技有限公司,北京 100101
- 折叠
摘要
Abstract
Aiming at the suspected crack defects in the welded flange cut-off valve used in a station,the cracking reason of the flange valve body was analyzed by chemical analysis,hardness test,metallographic structure observation,scanning electron microscope and energy spectrum detection.The results show that the chemical composition and hardness of the valve body meet the standard requirements.The expansion of the folding defect caused by the constraint stress during assembly is the main reason for the early crack of the valve body.It is recommended to ensure that the oxide scale and surface defects of the billet are effectively removed when the valve body is manufactured,and 100%non-destructive testing of the inner and outer surfaces of the valve body is carried out.关键词
焊接式法兰截止阀/阀体/裂纹折叠缺陷Key words
welded flange cut-off valve/valve body/folding crack分类
矿业与冶金引用本文复制引用
李冬,郭雷,郭磊,许彦,刘迎来,吴金辉..焊接式法兰截止阀阀体裂纹失效分析[J].焊管,2025,48(3):68-72,5.
