CAJ | 학술논문

采用扫描电子显微镜和能量弥散X射线谱方法对某液化石油气球罐安全阀接管内部出现的大面积严重腐蚀进行了原因分析,查明了失效原因,并提出了安全可靠的预防措施.结果表明:腐蚀原因是由于球罐在停用期间未将残液排除干净就直接关闭阀门,导致罐内残留的液化石油气中的水挥发成水蒸汽,并在低于露点的情况下在安全阀接管内部大量集聚冷凝,发生了水蒸汽腐蚀所致;建议在停用时将残液排除干净,并用干燥空气将里面吹干,然后再关闭阀门,可有效防止内部腐蚀的发生.
채용소묘전자현미경화능량미산X사선보방법대모액화석유기구관안전벌접관내부출현적대면적엄중부식진행료원인분석,사명료실효원인,병제출료안전가고적예방조시.결과표명:부식원인시유우구관재정용기간미장잔액배제간정취직접관폐벌문,도치관내잔류적액화석유기중적수휘발성수증기,병재저우로점적정황하재안전벌접관내부대량집취냉응,발생료수증기부식소치;건의재정용시장잔액배제간정,병용간조공기장리면취간,연후재관폐벌문,가유효방지내부부식적발생.
Scanning electron microscope and energy dispersion X ray spectrum method are used in reason analysis for the seriously large acreage corrosion appeared inner the relief valve connecting pipes in LPG spherical tanks, and the failure reason is found out., as well as good safety preventive measures are presented. Result shows that corrosion is because of switching off the valve without any arrangement during downtime of the spherical tank, resulting in the condensation of water vapor inner the relief valve connecting pipes upper dew-point, so that oxygen corrosion is happened. Inner corrosion can be effectively averted if drying the interior with drying air when blocked up, and then switching off the valve.