Single Side Imaging of Corrosion Under Insulation Using Single Photon Gamma Backscattering

Abdul‐Majid, Samir; Balamesh, Ahmed

doi:10.1080/09349847.2013.869376

Cited by 16 publications

(6 citation statements)

References 18 publications

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“…The Compton backscattering method is highly efficient when there is no access to either side of the pipe. Different studies have been carried out on the applications of this technique such as detecting the corrosion inside the pipes [10][11][12][13][14], measuring the thickness of the pipe walls [15], determining the wax thickness inside industrial pipes [16,17], and estimating the density of the materials [18].…”

Section: Introductionmentioning

confidence: 99%

Development of an experimental method based on Compton backscattering to measure the wax thickness in petroleum pipelines

kochakpour¹,

Taheri²,

Askari³

2021

J. Inst.

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A: Wax deposition inside pipelines is a major concern in oil and gas industries, and it must be continuously monitored. In this paper, a mathematical-experimental combined method based on the Compton scattering was proposed to determine the thickness of the wax deposited inside the industrial pipes. For this purpose, first, the relationship between the intensity of the backscattered gamma-rays and the thickness of the wax inside the pipe was mathematically modeled. Then, an experimental setup was prepared for measuring the intensity of the backscattered gamma-rays from the pipes with different wall thicknesses and different wax widths. Finally, the experimentally measured counts were used by the mathematical model to calculate the wax thickness. The obtained results revealed that using this method, the wax thickness can be determined with a mean error of less than 5%. K: Inspection with gamma rays; Gamma detectors (scintillators, CZT, HPGe, HgI etc); Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)

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Section: Introductionmentioning

confidence: 99%

Development of an experimental method based on Compton backscattering to measure the wax thickness in petroleum pipelines

kochakpour¹,

Taheri²,

Askari³

2021

J. Inst.

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“…Several concepts for gathering backscattered radiation have been proposed in the past, see e.g. [1][2][3]…”

Section: Introductionmentioning

confidence: 99%

New “improved” Compton scatter tomography modality for investigative imaging of one-sided large objects

Cebeiro

Nguyen

Morvidone

et al. 2017

Inverse Problems in Science and Engineering

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In an effort to promote Compton scatter tomography (CST) as an adequate modality for imaging the inner parts of large objects limited in a half-space of R 3 AQ1, we show that the standard CST can be 'improved' in some particular sense by 'doubling' the scanning mechanism. To this end, one needs to record for each position of a detector the scattered flux densities at two energies of scattered radiation, instead of one. Curiously, thanks to geometric inversion, this 'double' scanning may be converted into a transmission scanning on an apparent object, not along a straight line path as usual, but along a folded line in the shape of a V -line path. It has been proved that this V -line transmission scanning admits a well-defined reconstruction procedure. Therefore, the proposed CST with 'double' scanning, which solves the above imaging inverse problem, shows an 'improved' reconstructed image as compared to the standard one. We present theoretical arguments to support this claim as well as numerical simulations to illustrate its working and its viability AQ2 . ARTICLE HISTORY

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“…Naito and Yamamoto (2009) [4], successfully detected crack below deposit by using X -ray backscattering technique. Abdul -Majid and Tayyeb (2005) [8] and Abdul -Majid and Balamesh (2012) [9] used gamma ray backscattering method for inspection and imaging corrosion under insulation. Grubsky and et al (2013), describe Compton imaging tomography (CT) for reconstructing complete three -dimensional (3D) internal structure of an object, based on acquiring multiple Compton scattered X -ray images of object cross sections, and find the benefits of the backscatter X -ray from one -side operation, provides true high resolution 3D topographic data and allows inspecting deep layers of a structure [10].…”

Section: Introductionmentioning

confidence: 99%

Use of Compton Back Scattering Technique for Detection of Corrosion in Pipes

Al-Alawy

Kadhim

Ahmed³

2015

ILCPA

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The multiple Compton backscattering (MCBS) technique has been used to investigate the detection and imaging corrosion under the insulation pipe. An energy source with a mono – energy 0.662MeV of 137Cs has been used. Gamma ray photons have been allowed to be incident vertically on the insulator pipe whose outside diameter, wall and asbestos insulation thickness are (28, 1, 4) cm respectively. The steel pipe has a corrosion defect with a diameter 8 cm. The count rate of scattered γ – photons with scattering angle in the range (130 – 140) degrees has been collected by NaI(Tl) detector with different radius. Assuming the source and detector locations are in the same side from the pipe. Monte Carlo simulation has been written in FORTRAN95 language programming to follow the history of photons. This study provides the ability of this technique to detect and imaging the corrosion under the insulator pipes. The radius of detector which gives good results for corrosion detection and imaging is 6cm among five different selected radiuses.

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Single Side Imaging of Corrosion Under Insulation Using Single Photon Gamma Backscattering

Cited by 16 publications

References 18 publications

Development of an experimental method based on Compton backscattering to measure the wax thickness in petroleum pipelines

Development of an experimental method based on Compton backscattering to measure the wax thickness in petroleum pipelines

New “improved” Compton scatter tomography modality for investigative imaging of one-sided large objects

Use of Compton Back Scattering Technique for Detection of Corrosion in Pipes

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