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对某输气管爆裂原因进行分析，结果表明硫化物应力腐蚀是输气管爆裂的根本原因；补焊工艺不当使焊缝产生了马氏体组织及高的残余应力，增大了焊区应力腐蚀敏感性
The reason of burst of a gas pipe is analyzed. The results show that the sulfide stress corrosion is the root cause of gas pipe burst. Improper repairing process causes the martensite structure and high residual stress in the weld and increases the stress corrosion sensitivity Sex