The case study of applying Long Range Ultrasonic Test and two evaluation technique for corrosion detection of inaccessible pipe-rack in NIOC, Abouzar A&B petrochemical plant

Publish Year: 1394
نوع سند: مقاله کنفرانسی
زبان: English
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ICTINDT03_034

تاریخ نمایه سازی: 18 مرداد 1398

Abstract:

Due to aging of petrochemical plant and expectation of corrosion happening in their pipework, long range ultrasonic technology developed for detecting metal loss and wall thinning in pipework. It is pulse echo system aimed at testing large volumes of material from a single test point, [1]. It is initial application was for detecting corrosion under insulation in petrochemical plant , but it has found widespread use in other inspection situation where pipe or tubes are not accessible, for example where they are buried, encased in a sleeve or elevated above the ground. The purpose of this inspection is to examine and monitoring corrosion and erosion where possible the section of line passes along the elevated pipe-rack and classify indications as minor, moderate and major defect by choosing two reliable evaluation technique for further investigation and make decision to provide appropriate maintenance planning to ensure the continued operation of plant in a safe side. Unlike the other published paper, in this paper the concentration is on signals evaluation techniques. However this method is known as corrosion monitoring method, by applying two evaluation techniques, focus response and black & red signal technique, it is possible to obtain details information of suspected features and severity of defects by means of defects extension around circumference of pipe, [4].

Authors

Mohammad Hossein Taghipour

Pars Leading Inspection Company