讨论了大直径焊管焊缝边缘引起划痕的原因，分析减少焊缝边缘划痕的方法。

This paper discusses the reason of scratch in the weld seam border of large OD. welded steel pipe, and analyses the method to reduce it.

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上述定位标记和识别标记均应放在胶片的适当位置，并离焊缝边缘至少5 mm(图3)。

The above symbols should be put in the proper position of film, and the distance from weld edge should be at least 5mm (see picture3).

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锈蚀部位主要在棱角、拐角、边缘和角接焊缝处。

The rusty sites are mostly at the corners, edges and their welding lines.

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