摘要
Abstract
In this article, it introduced the existed problems in online weld preheating process of large diameter longitudinal welded pipe, and discussed 2 process programs for weld preheating by adopting medium-frequency induction preheating equipment based on the existing JCOE unit, according to welded pipe diameter size. The characteristic of the above process programs is weld preheating and welding simultaneously perform online, it can reduce energy consumption, maintain preheated temperature uniformity, and improve welding equipment utilization rate.关键词
焊接/大直径直缝埋弧焊管/焊缝在线预热/中频感应预热设备Key words
welding/large diameter SAWL pipe/weld preheating online/medium-frequency induction preheating equipment分类
矿业与冶金
