UW-50需要表面检测的焊缝范? uw-50要求如下两种焊缝的全长进行表面检测: (a) all welds around openings; 即d类焊缝。 (b) all attachment welds, including welds attaching nonpressure parts to pressure parts, having a throat thickness greater than 1⁄4 in. (6 mm). 指腰高大于6mm的非受压件与受压件之间的焊缝。 这里没有提到a、b焊缝。 查看更多