《Table 5 Procedural specifications for automatic girth welding of the hot-induction-bend and line pi

  提示：宽带有限、当前游客访问压缩模式

本系列图表出处文件名：随高清版一同展现

《Automatic girth welding and performance evaluation of the joints of hot-induction-bend and line pipes with different wall thickness》

1. 获取 高清版本忘记账户？点击这里登录

1. 下载图表忘记账户？点击这里登录

Table 5 presents the procedural specifications for automatic girth w elding of the hot-induction-bend and line pipes.In all of the w elds，w e applied approximately the same w elding procedural specifications.First，to avoid w elding flaw s，w e used a w ire brush or mechanical method to clean an area that w as w ithin a distance of 25 mm around the pipe end.To release w ater into the pipe section surface，the pipe sections must be preheated to no higher than 80℃.During w elding，the interpass temperature must become no more than 150℃.We applied straight draw ing w elding in the root and hot w elds w ith a fairly low heat input，w hereas w e applied single-layer sw ing w elding in the filler and cap w elds.We determined the sw ing w idth based on the remaining bevel w idth to ensure complete fusion and to ensure that there is no burn through.For the root w eld，w e used a PIW56（CPP900-IW56）automatic internal w elding machine w ith an internal alignment clamp，w hereas for the filler and cap w elds，w e used a PAW3000（CPP900-W2）external automatic w elding machine for filler and cap w elds.