The result shows some cracks appearing on vertical weld connecting web plate of body bolster and draft sill as well as the part between web plate of body bolster and top cover plate.

试验结果表明，无中梁罐车存在枕梁腹板与牵引梁立焊缝裂纹及枕梁腹板与枕梁上盖板之间的裂纹。

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For the T-fillet weld, there are high stress, difficult to weld, more defects and easy to be corroded in vertical oil tank, which is often neglected.

大型立式油罐t形角焊缝部位应力高，施工难度大，焊缝存在缺陷多，容易受到腐蚀，而且常被忽视。

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The double radius hole type was commonly adopted for the forming machine of straight weld pipe with vertical roller in domestic present.

目前，国内带有立辊组的直缝焊管成型机大都采用双半径孔型。

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