Muhammad Akram , Muhammad Umair , Mujeeb-Ur-Rehman , Asim Iqbal
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引用次数: 1
摘要
这是一个关于燃油发电厂由于材料ASTM a -304的耐火流体(FRF)管道失效而频繁被迫中断的案例研究。进行这种分析是为了找出最可能的故障原因并纠正问题。发现和分析裂纹的方法包括目视检测(VT)和染料渗透检测(PT)等无损检测技术以及问题整改后的定期监测。研究表明，在含有高压(系统压力115 bar)耐火流体的不锈钢管道中，会形成点蚀和坑向裂纹的转变。然而，更换管道后，点蚀和开裂再次发生。观察到，由于周围环境中可能暴露于含氯的湿气，形成了点蚀，然后转变为裂缝。本文的研究工作阐述了问题的检测过程和解决问题的措施。
Failure analysis of fire resistant fluid (FRF) piping used in hydraulic control system at oil-fired thermal power generation plant
This is a case study regarding frequent forced outages in an oil-fired power generating station due to failure of fire resistant fluid (FRF) piping of material ASTM A-304. This analysis was done to find out the most probable cause of failure and to rectify the problem. Methods for finding and analyzing the cracks include nondestructive testing techniques such as visual testing (VT) and dye penetrant testing (PT) along with that periodic monitoring after rectification of problem. The study revealed that pitting and pit to crack transitions were formed in stainless steel piping containing high pressure (system pressure 115 bars) fire resistant fluid. However, after replacement of piping the pitting and cracking reoccurred. It was observed that due to possible exposure to chlorinated moisture in surrounding environment pitting was formed which then transformed into cracks. The research work discussed in this paper illustrates the procedure used in detection of the problem and measures taken to solve the problem.
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