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厂家正确选择冷凝器焊接工艺是保证质量关键

人气:125 评论:0 日期:2018-05-15 10:54:33

 正确选择冷凝器焊接工艺是保证质量的重要因素。除考虑选择焊接方法,焊条、焊接位置、运输条件等外,还有考虑焊前预热和焊后热处理。应按金属材料的性能及预热条件来决定是否需预热及其温度和方法。为了防止焊接变形和减少残余应力,按顺序先将每根管子两端与管板点焊,每根管子需点焊均匀分布的点后,再进行焊接。划分区域的多少按管板直径而定,大管板可以多分几个区域。
The right choice of condenser welding process is an important factor to ensure quality. In addition to considering the choice of welding methods, welding electrodes, welding position and transportation conditions, and pre heating and post weld heat treatment are also considered. Preheating and temperature and methods should be determined according to the properties and preheating conditions of metal materials. In order to prevent welding deformation and reduce residual stress, each pipe is welded at each end of the pipe and the tube plate is welded in order, and each pipe needs to be welded evenly. The number of divisions is determined by the diameter of the tube plate, and the large tubesheet can be divided into several areas.

  为了保证冷凝器焊接质量,管口端面与管端外圆表面及管板孔壁面必须经过净化处理。先将灰碳、油污、铁锈等杂质清除干净,再用丙酮或四氯化碳对焊接部分进行脱脂,并用压缩空气吹干净范围为管端外圆,其长度要稍大于管板厚度。

In order to ensure the welding quality of the condenser, the surface of the pipe end and the surface of the tube end and the tube wall must be purified. The impurities such as ash, oil, rust and other impurities are cleaned up first, and then acetone or carbon tetrachloride is used to degrease the welding part, and it is blown clean with compressed air to the outside of tube end, and its length is slightly larger than that of tube plate.

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