Case Study of Steam Pipe Failure

Jun 21st, 2015
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Abstract This paper is concerning with the state of corrosion caused the failure of carrier pipe elbow of three steam boilers where one of them run periodically to one of the production line units & it is evaluated by microscopic examination. The steps and actions that have been taken to study the document related to operating line and the date, duration and time for failure occur, where samples taken from the failure part and analysed for water input and output of boiler examined as well.

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Case Study of Steam Pipe Failure& Microscopic ExaminationMosbah Ali akrimIndustrial Research Center -Libyamakreem@yahoo.comAbstract This paper is concerning with the state of corrosion caused the failure of carrier pipe elbow of three steam boilers where one of them run periodically to one of the production line units & it is evaluated by microscopic examination. The steps and actions that have been taken to study the document related to operating line and the date, duration and time for failure occur, where samples taken from the failure part and analysed for water input and output of boiler examined as well. The analysis of microscopic examination indicates that the corrosion caused by the dissolved oxygen in steam, which caused an intergranualr corrosion& stress corrosion cracking as well as. DescriptionThis case represented in a failure apart of the steam pipe line (elbow) connects the boiler(1)with three steam boilers that would be one boiler operation periodically and tube metal is a carbon steel diameter of 150mm and a thickness of 5 mm and operating pressure20 atmospheric pressure and at a temperature of 200 C and failure occur on04/08/1997and Figure(1) illustrates a diagram for failure part in the steam line.Fig (1) shows the failure positionVisual Examinationthe crack exists in the left side of the elbow in the form of a fish's mouth and there is a bulgein place of the crack is not regular. And after cutting the elbow section we find p

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