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Abstract
Composite pipeline repair systems involving infill material and composite wrapper are a common method of enhancing the integrity of damaged oil and gas pipelines. Composite wrappers can be theoretically optimised by minimising the layers of wrapper whilst reinforcing the infill material; i.e., putty. Integrating nanomaterial into putty to enhance its strength is a novel approach to provide secondary layer protection of damaged pipelines. A finite element model simulating a composite repaired pipe was developed to investigate the influence of reinforced Carbon Nanotubes putty on the system's overall repair performance and behaviour. The result was verified with a previous experimental hydrostatic burst pressure test and industrial standard resulting in less than a 15% error margin. The result shows the damaged artificial pipe segment filled with two different putties, namely Grout A and Grout B, ruptured at 32.22 MPa and 32.93 MPa, respectively. The reinforced putty improved the load-bearing capacity of the repaired pipe by a marginal increment of 2.2%. It demonstrated a better load-transfer and load-sharing mechanism than the common composite repair system. The recorded burst failure of the repaired pipe was less abrupt, thus minimising the sudden rupture of the pipeline by acting as a secondary layer of protection in the event of a composite wrapper failure.
Item Type: | Article |
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Additional Information: | Indexed by Scopus |
Uncontrolled Keywords: | Load-transfer mechanism; Reinforced putty; Carbon nanotubes; Finite element analysis; Repaired pipeline; Burst failure |
Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
Faculty/Division: | College of Engineering |
Depositing User: | Mrs Norsaini Abdul Samat |
Date Deposited: | 29 Dec 2021 02:12 |
Last Modified: | 29 Dec 2021 02:12 |
URI: | http://umpir.ump.edu.my/id/eprint/32695 |
Download Statistic: | View Download Statistics |
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