概述尿素高压容器是大型尿素装置的主要设备。为了承受高的工作压力和耐腐蚀,多采用不锈钢管制造,但容器两端的管板则是用表面有一层不锈钢堆焊层的碳钢造成。管子固定于管板常常采用胀管后焊的方法(如图1)。如果焊缝泄漏,泄漏出来的工作溶液便与碳钢管板作用,直至碳钢管板被蚀穿。因此当发现泄漏时,就必须停车修理。工作溶液的泄漏,可以通过 Overview Urea high pressure vessels are the main equipment for large urea plants. In order to withstand high work pressure and corrosion resistance, the use of stainless steel pipe manufacturing, but both ends of the tube plate is the surface with a layer of stainless steel surfacing carbon steel caused. Tube fixed to the tube plate is often used after the expansion tube welding method (Figure 1). If the weld leaks, the leaking working solution acts on the carbon steel tube until it is etched through. Therefore, when a leak is found, it must be stopped and repaired. Leakage of working solution can be passed