摘要
内孔焊接是为改善端面焊接的缺点而采取的较先进的工艺方案,是一个全焊透的接头,没有缝隙,没有应力集中点,抗应力腐蚀和抗疲劳强度高,缺点是对管板加工,装配以及焊接设备及技术要求较高,返修困难,成本较高。用内孔焊结构代替传统的管对管板角焊缝结构是提高换热管与管板连接焊缝抗应力腐蚀能力和间隙腐蚀能力的根本途径。本文以苯乙烯装置进出料换热器中的内孔焊结构为例,详细介绍了内孔焊的实施,通过大量工艺试验最终在正式产品焊接中获得了令人满意的结果。
Using the Inner-hole welding structure instead of the traditional structure of the tube to tube weld seam is the basic way to improve the anti-stress corrosion and gap anti-corrosion of the tube to tube welding joint. In this article, takes the inner-hole welding structure in styrene feeding and unloading heat exchanger as an example, describes in detail the implementation of the inner-hole welding, through many welding experiments, the satisfied results is obtained in the formal welding products finally.
出处
《新技术新工艺》
2009年第1期65-67,共3页
New Technology & New Process
关键词
内孔焊结构
工艺难点
焊接工艺试验
inner-hole welding structure, process difficulties, welding technology test
