某干气线法兰焊接接头开裂原因分析
Analysis of Cracking Reasons for Flange Welding Joints in a Certain Dry Gas Line
刘春辉1
作者信息
- 1. 中石化(天津)石油化工有限公司装备研究院,天津 300270
- 折叠
摘要
某加氢裂化装置开车过程中干气线的法兰焊接接头发生开裂,本文通过宏观检验、金相检验、硬度检测、化学成分分析等方法,对管线泄漏原因进行了分析研究.结果表明:该管线法兰的化学成份不符合设计标准要求,在低温湿硫化氢环境下发生了应力腐蚀开裂.
Abstract
During the start-up of a hydrocracking unit,the flange welding joint of the dry gas pipeline cracked.This article analyzed and studied the causes of pipeline leakage through methods such as macroscopic inspection,metallographic examination,hardness testing,and chemical composition analysis.The results indicate that the chemical composition of the pipeline flange does not conform to the requirements of design standard,and stress corrosion cracking occurred in a low-temperature wet hydrogen sulfide environment.
关键词
焊接接头/应力腐蚀/开裂Key words
welded joint/stress corrosion/dehiscence引用本文复制引用
出版年
2024
NETL
NSTL
万方数据