在上海炼油厂预加氢反应器投用前的内外部检验中，发现了大量的焊缝表面裂纹和内部埋藏裂纹。
On overall inspection of interior and exterior of pre-hydrogenating reactor of Shanghai Oil Refinery Factory, large cracks was found on the surface of weld and inside of the weld.
通过对球罐的整体应力分析，指出将焊缝布置在高应力区域是造成焊缝裂纹的重要外部因素之一。
On the basis of FEM stress analysis of a sphere tank, it can be concluded the arrangement of weld in high stress area which was one of the most important exterior factors that cause weld cracks.
通过对球罐的整体应力分析，指出将焊缝布置在高应力区域是造成焊缝裂纹的重要外部因素之一。
On the basis of FEM stress analysis of a sphere tank, it can be concluded the arrangement of weld in high stress area which was one of the most important exterior factors that cause weld cracks.
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