焊管2024，Vol.47Issue(7)：62-68,7.DOI:10.19291/j.cnki.1001-3938.2024.07.010
某钢厂输送液压油API管道失效分析
Failure Analysis of API Pipes Used for Hydraulic Oil in an Integrated Steel Plant
摘要
Abstract
API grade pipes used for hydraulic oil in an integrated steel plant has failed twice in a month.The first failure appeared 4.7 m long longitudinal cracks,the second failure of the pipeline appeared a small amount of leakage.The pressure of the pipeline transporting hydraulic oil is 3～14 MPa and the ambient temperature is 25～40℃.The failure of the seamless pipe may be caused by high strain rate or hydrogen induced cracking(HIC).Chemical analysis,tensile test,hardness test,macroscopic observation,optical and electron microscopy and energy spectrum analysis(EDS)are used to analyze the failure causes and mechanisms.The results show that the combination of hydrogen produced by the decomposition of hydraulic oil in the pipeline and sulfide inclusion in the pipe leads to the failure of the pipe body due to hydrogen induced cracking.关键词
无缝钢管/断裂失效/氢致开裂/裂纹扩展Key words
seamless steel pipe/fracture failure/hydrogen induced cracking/crack growth分类
矿业与冶金引用本文复制引用
芦琳,李周波,徐凯,张锦刚,谭子茗,符利兵,PATAL S N,SINGH D K,AKULA D P..某钢厂输送液压油API管道失效分析[J].焊管,2024,47(7):62-68,7.基金项目
中国石油天然气集团有限公司前瞻性、基础性、战略性技术攻关课题"井下大功率电加热器研制"(项目编号2022DJ1409). （项目编号2022DJ1409）
