unwelded

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、贯穿管子整个壁厚细孔，可导致流体从该孔缓慢漏出。

and a recently approved Uniform Fire Code Standard,80.106, requires a mechanical ventilation rate of 200 fpm across all unwelded fittings).

近来统一消法标准80.106所有无焊接装置机械风速度为200fpm）。