| 安全阀配对法兰焊口裂纹产生原因分析 |
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| 引用本文： | 李科,柳建华,李天雷,曹晓燕,施岱艳,殷名学,姜放.安全阀配对法兰焊口裂纹产生原因分析[J].理化检验(物理分册),2012(7):478-482. |
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| 作者姓名： | 李科 柳建华 李天雷 曹晓燕 施岱艳 殷名学 姜放 |
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| 作者单位： | [1]中国石油天然气集团公司石油管工程重点实验室四川分室,成都610017 [2]中国石油集团工程设计有限责任公司西南分公司,成都610041 [3]塔里木油田公司油气田产能建设项目部,库尔勒841000 |
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| 摘 要： | 某集气装置原料气放空安全阀配对法兰焊口处出现裂纹，通过宏观以及微观检验、化学成分分析、力学性能测试等方法对裂纹产生的原因进行了分析。结果表明：该裂纹为硫化物应力腐蚀开裂所致，焊接工艺不当或焊后冷却速度过快导致焊接接头区域出现硫化物应力腐蚀开裂敏感性组织是该焊口产生裂纹的主要原因。
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| 关 键 词： | 安全阀 焊口 裂纹 硫化物应力腐蚀 焊接工艺 冷却速度 |
Reason Analysis on Cracks of Flange Welding Joint Matched with a Relief Valve |
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| LIKe,LIU Jian-hua,LI Tian-lei,CAO Xiao-yan,Sill Dai-yan,YIN Ming-xue,JIANG Fang.Reason Analysis on Cracks of Flange Welding Joint Matched with a Relief Valve[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2012(7):478-482. |
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| Authors: | LIKe LIU Jian-hua LI Tian-lei CAO Xiao-yan Sill Dai-yan YIN Ming-xue JIANG Fang |
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| Affiliation: | 1. CNPC OCTG Engineering Key Laboratory Siehuan Department, Chengdu 610017, China; 2. Southwest Company, China Petroleum Engineering Co., Ltd., Chengdu 610041, China; 3. Productivity Construction Project Department in Oil and Gas Field, Petrochina Tarim Oilfield Company, Korla 841000, China) |
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| Abstract: | Cracks have occurred in the welding ioint of the flange, which is matched with a blowdown relief valve of a gas collecting device. The reason of crack was analyzed by means of macro and micro examination, chemical composition analysis, mechnical property testing and so on. The results showed that the sulfide stress corrosion cracking had occurred, and improper welding procedure or excessive cooling rate after welding was the main reason leading to the susceptive microstructure of sulfide stress corrosion cracking which resulted in the cracks in the weld. |
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| Keywords: | relief valve welding joint crack sulfide stress corrosion welding procedure cooling rate |
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