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标题：Experimental investigation into the effect of erosion and corrosion in pipes conveying fluid on its frequencies
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作者：Karrar Ibrahim Mohammed ; Younus Mohammed Younus
期刊名称：International Journal of Energy and Environment
印刷版ISSN：2076-2895
电子版ISSN：2076-2909
出版年度：2019
卷号：10
期号：1
页码：1-8
出版社：International Energy and Environment Foundation (IEEF)
摘要：Pipes conveying fluid have many uses and the danger increases as the fluid is more likely to burn in the event of contact with the atmosphere, especially in oil installations. Many of the problems occurred due to the erosion and corrosion caused large explosions and many losses. For example, the fire and explosion in Chevron Richmond refinery in California. From this example and others, the idea of detecting erosion was introduced using vibration sensors. In this paper, proposed by the researchers an experimental method for detecting chemical corrosion and erosion caused by the flow of fluid inside the pipe in addition to the effect of external conditions in Al-Najaf Refinery. The examination was carried out by followed pipe (154.06mm) internal diameter, (168.28mm) external diameter and (7.11mm) thickness. The pipe specifications were ASTM\ASME A106 Grade B Sch40, 210Mpa modulus of elasticity and 7.85×103Kg/m3 density. The pipe conveying RCR fluid and fixed with simply-supported ends. The focus was on a 10-meter pipe length. Also, the thickness of the pipe measured by Ultrasonic Thickness Gauge, and the frequency measured by Digital Vibration Meter, and the fluid velocity measured by Ultrasonic Flow-meter. The required values were examined every three months within five years in the same velocity and by keeping it within the limits of laminar flow. By followed up and studied the draw diagrams to find the search results, it has been shown that decreasing the thickness of the pipes over time due to erosion corrosion gives an increase in the frequency of the pipe transmitted fluid. This was evidence of the possibility of getting an indicator of erosion and corrosion through the pipes vibration. Where, the sensitivity of the frequency increase was indicated by the decrease in the thickness of the pipe due to the erosion and corrosion of the pipe wall. The percentage increase of frequency between the standard pipe without erosion and corrosion and the pipe after 5 years is 3.91%.
关键词：Corrosion; Erosion; Frequency; Pipe thickness;