乙烯工业 ›› 2025, Vol. 37 ›› Issue (3): 40-42.

• 裂解炉 • 上一篇    下一篇

某裂解炉辐射炉管压力表引压管泄漏的原因分析

杨继承,李慧涛,潘延君,周家成,孙耀威   

  1. 广东石化有限责任公司,广东 揭阳  515200
  • 收稿日期:2024-12-23 修回日期:2025-04-15 出版日期:2025-09-25 发布日期:2025-09-28
  • 作者简介:杨继承,男,2020年毕业于西南石油大学过程装备与控制工程,获学士学位,现主要从事乙烯装置设备管理工作,助理工程师。

Cause Analysis of Leakage in Pressure Gauge Impulse Line of Radiant Coil in a Cracking Furnace

Yang Jicheng, Li Huitao, Pan Yanjun, Zhou Jiacheng, Sun Yaowei   

  1. Guangdong Petrochemical Co., Ltd, Jieyang, Guangdong, P.C.515200
  • Received:2024-12-23 Revised:2025-04-15 Online:2025-09-25 Published:2025-09-28

摘要:

某石化公司1 200 kt/a乙烯装置裂解炉辐射炉管的引压管根部焊缝处出现泄漏,通过宏观形貌、材质检测、金相分析、电镜扫描及能谱分析等方面进行全面排查,得出该部位开裂性质为小管组织韧性下降,在结构应力作用下出现疲劳产生的裂纹。其原因是主管与支管连接处应力集中严重,在高温条件下长期服役出现材料敏化,焊缝处产生微裂纹后,不断从外向内逐步扩展,最终造成贯穿性裂纹出现泄漏情况。

关键词: 引压管  , 腐蚀  , 裂纹  , 分析

Abstract:

A comprehensive investigation was conducted on the leakage at the root weld of impulse line of the radiant coil in cracking furnace of a 1.2 Mt/a ethylene plant. Through macroscopic morphology, material testing, metallographic examination, electron microscopy scanning and energy spectrum analysis, it was found that the cracking at this location was due to the decrease in the toughness of small tube structure, resulting in fatigue cracks under structural stress. The reason was that severe stress concentration occurred at the connection between the main pipe and the branch pipe. Material sensitization occurred during long-term service at high temperature, leading to microcracks at the weld seam. These cracks gradually expanded from the outside to the inside, ultimately forming through-thickness cracks and causing leakage.

Key words: impulse line, corrosion, crack, analysis