Development of ultrasonic tomographic instrumentation system monitoring flaws on pipeline

Online inspection and in situ monitoring for natural gas transmission and distribution pipeline is significant to prevent any fatal incident and to maintain pipe integrity. Most inspection technique conducted in industry is for the localized flaws detection. It is important to have an inspection sys...

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Main Author:	Nordin, Norsuhadat
Format:	Thesis
Language:	English
Published:	2016
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/78362/1/NorsuhadatNordinPFChE2016.pdf
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spelling	my-utm-ep.783622018-08-26T04:53:29Z Development of ultrasonic tomographic instrumentation system monitoring flaws on pipeline 2016-04 Nordin, Norsuhadat TP Chemical technology Online inspection and in situ monitoring for natural gas transmission and distribution pipeline is significant to prevent any fatal incident and to maintain pipe integrity. Most inspection technique conducted in industry is for the localized flaws detection. It is important to have an inspection system that is capable of producing an overall image of pipe profile (circumferentially) which can show the actual location of the flaws. Therefore, an ultrasonic tomographic instrumentation system was designed and fabricated for this study to monitor the existence of flaws circumferentially on pipeline. It consists of an ultrasonic sensing system, a data acquisition system and an image reconstruction system (software development). There were twenty-eight ultrasonic sensors arranged on a sensing ring that surrounded a carbon steel pipe NPS 8 (219 mm external diameter). The sensors were contactless to the pipe at a distance of 50 mm. Several testings were conducted to identify the ultrasonic beam pattern, the uniformity of ultrasonic beam intensity and the image grid covered by each sensor. A calibration test on distance measurement was conducted based on 40 mm to 60 mm range of distance, and the result showed ± 0.3 mm maximum error with the average accuracy of 99.82%. Three experiments on flaws detection around the pipe were carried out, which were the external flaws, internal flaws and a combination of external and internal flaws. The depth of flaws was ranging from 0.4 mm to 3.3 mm. From the output data, a tomogram image of the circumference pipe profile with flaws existence was reconstructed using linear back projection algorithm and direct method. The computer programming on image reconstruction was performed using MATLAB software. In brief, the developed ultrasonic tomography system was capable in detecting the flaws on pipeline, and visualizing the actual location of the flaws. 2016-04 Thesis http://eprints.utm.my/id/eprint/78362/ http://eprints.utm.my/id/eprint/78362/1/NorsuhadatNordinPFChE2016.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:98233 phd doctoral Universiti Teknologi Malaysia, Faculty of Chemical Engineering Faculty of Chemical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Nordin, Norsuhadat Development of ultrasonic tomographic instrumentation system monitoring flaws on pipeline
description	Online inspection and in situ monitoring for natural gas transmission and distribution pipeline is significant to prevent any fatal incident and to maintain pipe integrity. Most inspection technique conducted in industry is for the localized flaws detection. It is important to have an inspection system that is capable of producing an overall image of pipe profile (circumferentially) which can show the actual location of the flaws. Therefore, an ultrasonic tomographic instrumentation system was designed and fabricated for this study to monitor the existence of flaws circumferentially on pipeline. It consists of an ultrasonic sensing system, a data acquisition system and an image reconstruction system (software development). There were twenty-eight ultrasonic sensors arranged on a sensing ring that surrounded a carbon steel pipe NPS 8 (219 mm external diameter). The sensors were contactless to the pipe at a distance of 50 mm. Several testings were conducted to identify the ultrasonic beam pattern, the uniformity of ultrasonic beam intensity and the image grid covered by each sensor. A calibration test on distance measurement was conducted based on 40 mm to 60 mm range of distance, and the result showed ± 0.3 mm maximum error with the average accuracy of 99.82%. Three experiments on flaws detection around the pipe were carried out, which were the external flaws, internal flaws and a combination of external and internal flaws. The depth of flaws was ranging from 0.4 mm to 3.3 mm. From the output data, a tomogram image of the circumference pipe profile with flaws existence was reconstructed using linear back projection algorithm and direct method. The computer programming on image reconstruction was performed using MATLAB software. In brief, the developed ultrasonic tomography system was capable in detecting the flaws on pipeline, and visualizing the actual location of the flaws.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Nordin, Norsuhadat
author_facet	Nordin, Norsuhadat
author_sort	Nordin, Norsuhadat
title	Development of ultrasonic tomographic instrumentation system monitoring flaws on pipeline
title_short	Development of ultrasonic tomographic instrumentation system monitoring flaws on pipeline
title_full	Development of ultrasonic tomographic instrumentation system monitoring flaws on pipeline
title_fullStr	Development of ultrasonic tomographic instrumentation system monitoring flaws on pipeline
title_full_unstemmed	Development of ultrasonic tomographic instrumentation system monitoring flaws on pipeline
title_sort	development of ultrasonic tomographic instrumentation system monitoring flaws on pipeline
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical Engineering
granting_department	Faculty of Chemical Engineering
publishDate	2016
url	http://eprints.utm.my/id/eprint/78362/1/NorsuhadatNordinPFChE2016.pdf
_version_	1747817970695929856

Development of ultrasonic tomographic instrumentation system monitoring flaws on pipeline

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