Pinhole. A short unwelded area in the weld line extending through the entire pipe so that fluid will leak out through the area very slowly.
针孔。指焊缝线上位焊接的、贯穿管子整个壁厚的细孔，可导致流体从该孔缓慢
出。
Pinhole. A short unwelded area in the weld line extending through the entire pipe so that fluid will leak out through the area very slowly.
针孔。指焊缝线上位焊接的、贯穿管子整个壁厚的细孔，可导致流体从该孔缓慢出。
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；
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