论文部分内容阅读
超声波探伤的特点由于双层热套容器环缝的坡口型式与单层容器的不同,其焊缝的探伤,也比一般单层焊缝的探伤受到某些限制。如:1、可供探伤的基面少从图1可看出,无论是内筒或外筒的焊道检查,都只具备一壁两个探伤侧面。为使在探伤中横波声束中心均能扫索全部焊道,对内外筒焊道只有采用一、二次声程探伤,才能达到这一根本探伤要求。可是,从内外筒厚度大小可以看到,内筒厚度已达100毫米,当采用二次声程探伤时,处于远程探伤;在现场探伤中,须带有大而沉重的试
The characteristics of ultrasonic flaw detection double-layer thermowell container girth groove groove type and single-layer container of different, its weld flaw detection than the average single-layer weld by some limitations. Such as: 1, less flaw detection surface can be seen from Figure 1, whether it is within the barrel or outer tube of the weld inspection, only one wall with two flanks. In order to ensure that all the weld beads can be swept through the center of the transverse wave beam during the flaw detection, the primary and secondary sound path flaw detection can only be achieved for the inner and outer barrel weld bead. However, the thickness of the inner and outer cylinder can be seen from the thickness of the inner cylinder has reached 100 mm, when the use of secondary sound path detection, in the remote inspection; in the field inspection, with a large and heavy test