小型立式电热蒸汽灭菌器,价格便宜,使用方便,占地面积小,不需要配套锅炉,是乡镇卫生院非常理想的消毒、杀菌器械。2011年在对某些乡镇卫生院的这种灭菌器的定期检验中,考虑到这种设备为频繁使用非连续工作,长期承受循环载荷作用,有可能产生疲劳失效的风险。在制定检验方案时,针对有可能产生疲劳裂纹缺陷,特别增加了表面探伤的抽查比例。在实际检验中,果然发现有的灭菌器筒体法兰表面产生径向裂纹,裂纹由内向外延伸,分布整个法兰面。现就其中情况严重的1台,对产生裂纹的原因进行分析,法兰裂纹如图1所示。 Small vertical electric steam sterilizer, cheap, easy to use, small footprint, do not need to support the boiler, is the township hospitals ideal disinfection and sterilization equipment. In 2011, during regular inspections of such sterilizers in some township hospitals, the risk of fatigue failure may be posed by the long-term cyclic loading of such equipment for frequent use of discontinuous work. In the development of test programs, in view of possible fatigue crack defects, in particular, increased the proportion of surface inspection spot checks. In the actual test, it was found that some sterilizer cylinder flange surface radial cracks, cracks extending from the inside out, the distribution of the entire flange surface. Now one of them in serious cases, the reasons for the crack analysis, flange cracks shown in Figure 1.