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公司化工厂的四段氧化塔是由德国引进的设备。人孔φ400mm,其法兰和人孔盖均采用复合材料制造。复层为1.4571(相当于1Cr18Ni9Ti),基面为 H_(?)(相当于20g)。工作介质为酸性氧化物,工作压力98×10~4Pa。由于人孔装配密封不好,造成人孔盖及法兰碳钢面大面积腐蚀(大约长150mm,深8～9mm),不但降低了受压元件的强度,而且滴漏出的介质还在腐蚀其它设备。我们承接了该人孔的补焊任务,要求补焊面平整,不能变形。人孔盖变形还可以重新修复加工,若法兰变形只能报废,经分析研
The company’s four-stage oxidation tower is imported from Germany equipment. Manhole φ400mm, the flange and manhole cover are made of composite materials. The stratification is 1.4571 (equivalent to 1Cr18Ni9Ti), the base surface is H _ (?) (Equivalent to 20g). Working medium is acidic oxide, working pressure 98 × 10 ~ 4Pa. As the manhole assembly seal is not good, resulting in manhole cover and flange carbon steel surface corrosion (about 150mm long, 8 ~ 9mm deep), not only reduces the strength of the pressure element, and the drip is still corrosion of other media equipment. We undertake the manhole welding repair tasks, requiring welding surface formation, can not be deformed. Manhole cover deformation can also be repaired, if the flange deformation can only be scrapped, the analysis of research