Thermal gradient pattern of shallow pitting via active thermography-water and steam

Ismon, Maznan and Chai, Ronnie and Ismail, Al Emran and Zainulabidin, Muhd Hafeez and Mat Noor, Fazimah and Abd Wahab, Hanani and Mohamad, Zaleha and Madlan, Mohd Amran and Zaman, Izzuddin (2018) Thermal gradient pattern of shallow pitting via active thermography-water and steam. International Journal of Integrated Engineering, 10 (1). pp. 138-141. ISSN 2229-838X

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Pipelines are extensively used worldwide to transport water, oil and gas. Wall thinning or pits can be produced in the internal of the pipe after being used for a certain period of the time due to some factor such as erosion-corrosion and pitting corrosion. This problem concern lots of company in various industry because leakage of pipe cause system failure, hazard at workplace and increase of maintenance cost. This study detected internal wide and shallow pitting of pipe using infrared thermography. ASTM A106 Grade B carbon steel pipe test specimen was drill with five similar size defects shallow pitting within different depth. The result found that all defects appear at 90°C temperature exposure, while only four defects appear at 70°C and 80°C of temperature exposure. This is due to the higher temperature introduced into the pipe, the higher temperature gradient could be observed. Introducing a 90°C of heat source will produce the shortest time for the spot to appear while for 70°C take the longest time. Image analysis software assists to conclude that the defect areas are within 146% to 222% larger than the actual size at pipe.

Item Type: Article
Uncontrolled Keywords: NIL
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ836-927 Hydraulic machinery
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Mechanical Engineering
Depositing User: Miss Afiqah Faiqah Mohd Hafiz
Date Deposited: 22 Nov 2021 02:51
Last Modified: 22 Nov 2021 02:51

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