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大庆油田某化工厂轻烃球罐,在安装建造8年后开罐检查,发现内表面产生大量裂纹,裂纹主要沿焊缝分布。在这之后每年都开罐检查,核定裂纹的扩展情况。发现裂纹在不断伸展。裂纹的扩展可导致球罐的突然爆裂,国外这种情况多有发生。据英国调查资料表明,由于裂纹而引起的压力容器破坏事故,约占发生事故的89.3％。因而,加强对压力容器的监测是十分重要的。为了保证球罐的安全生产,我们对裂纹进行了分析,采用补焊的方法修复球罐裂纹,并对其修复的可靠性进行了探讨。
Daqing Oilfield chemical plant light hydrocarbon spherical tank, installation and construction in the open cans inspection after 8 years and found that a large number of internal surface cracks, cracks are mainly distributed along the weld. After each open canning inspection, approved the expansion of crack. Crack in the continuous expansion. Crack expansion can lead to a sudden burst of the spherical tank, a situation that has occurred abroad. According to the British survey data show that due to cracks caused by pressure vessel damage accidents, accounting for about 89.3% of accidents. Therefore, to strengthen the monitoring of pressure vessels is very important. In order to ensure the safe production of the spherical tank, we analyzed the crack, repaired the crack of the spherical tank by means of welding repair, and discussed the reliability of its repair.