Abstract
In this paper, a non-destructive, reliable, and inexpensive vibration-based technique for evaluating Carbon steel pipes structure integrity. The proposed techniques allow a quick assessment of pipes structures at final pipe manufacturing stages and/or just before installation. A finite element modelling (FEM) using ABAQUS software was developed to determine the resonance mode of healthy Carbon steel pipe and a series of experiments were conducted to verify the outcomes of the modelling work. Consequently, the effects of quantified seeded faults, i.e., a 1 mm, 2 mm, 3 mm, and 4 mm diameter holes in the pipe wall on these resonance modes were determined using modelling work. A number of common used vibration analysis techniques were applied to detect and to evaluate the severity of those quantified faults. The amplitudes and frequencies of vibration signals were measured and compared. There were found to be in good agreement with the modelling work and provide important information on pipe construction condition and fault severity.
Highlights
The Maintenance of pipelines is of a great concern for oil companies
A finite element modelling (FEM) using ABAQUS software was developed to determine the resonance mode of healthy Carbon steel pipe and a series of experiments were conducted to verify the outcomes of the modelling work
Comparison was made between leak detection results of harmonic wavelet and Daubechies wavelet, and it was found that harmonic wavelet based small leak detection approach performed better
Summary
The Maintenance of pipelines is of a great concern for oil companies. A proper and sensitive pipeline condition monitoring is desirable to predict leakage and other failure modes e.g. flaws, cracks, etc. Khalifa, Ben Mansour and Habib [3] presented an experimental investigation to address the feasibility and potential of in pipe acoustic measurements for detection. They constructed a test rig for simulation purpose. It used to simulate a water transmission pipeline and permit different leak siaes, pressure and flow rates. They stated that the feasibility and limitations of invoking in-pipe
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