Welcome To UTPedia

We would like to introduce you, the new knowledge repository product called UTPedia. The UTP Electronic and Digital Intellectual Asset. It stores digitized version of thesis, dissertation, final year project reports and past year examination questions.

Browse content of UTPedia using Year, Subject, Department and Author and Search for required document using Searching facilities included in UTPedia. UTPedia with full text are accessible for all registered users, whereas only the physical information and metadata can be retrieved by public users. UTPedia collaborating and connecting peoples with university’s intellectual works from anywhere.

Disclaimer - Universiti Teknologi PETRONAS shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.Best viewed using Mozilla Firefox 3 or IE 7 with resolution 1024 x 768.

Failure Analysis of Ethylene Cracking Heater, ET-O-F-105 Tube

Abdul Hadi Bin Alias, Abdul Hadi (2010) Failure Analysis of Ethylene Cracking Heater, ET-O-F-105 Tube. Universiti Teknologi Petronas. (Unpublished)

[img]
Preview
PDF
Download (1511Kb) | Preview

Abstract

The study is to analyze failure of an ethylene cracking heater’s tube, from Ethylene (M) Sdn Bhd. The objectives of the research are to conduct relevant tests and experiments, analyze data obtained and suggest recommendations to avoid similar incident in the future. Visual Inspection revealed cracks and deformation on the tube. Inner surface of the tube experienced more failure compared to outer surface of the tube. It can be concluded that the failure was originated from the inner side of the tube. Non-Destructive Testing revealed the only three cracks detected. However, from the visual inspection, cracks can be detected. It can be concluded that, the failure was originated from the inner side and penetrated to the outer surface at some point where the failure is most severe. From Hardness Testing, at inner surface of the tube, where carburization was most severe, the average hardness was found to be higher than the middle section of the tube. Carburization is expected to the factor of this hardening. From Microscopy Examination, precipitates of small blocky type are found in the austenitic grains. Comparison between Microscopy Examination image with higher magnification and uncarburized Nickel-Chromium image revealed that high degree of carbide precipitation at the grain boundaries and blocky carbide particles in the matrix compared to the uncarburized Nickel-Chromium alloy. Chemical Analysis proved Carbon’s involvement at the surface of the tube. Fractography showed intergranular fracture of the tube. It can be concluded that the mode of failure of the radiant furnace tube was a combination of creep damage and carburization attack. Experimental data shows that the furnace tube had undergone carburization due to exposure to excessively high temperature and carbide formation from the reaction of carbon during service. To avoid similar incident in the future, it is recommended for Ethylene (M) Sdn Bhd to review all operating parameters of the furnace. As a long-term recommendation, it is also recommended for Ethylene (M) Sdn Bhd to replace Nickel-Chromium alloy with an Al2O3-forming alloys. It is recommended to further study the furnace system and analyze samples from other furnace units.

Item Type: Final Year Project
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Users 5 not found.
Date Deposited: 11 Jan 2012 12:23
Last Modified: 25 Jan 2017 09:43
URI: http://utpedia.utp.edu.my/id/eprint/1466

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...