Detection Experimental Analysis of Light Hydrocarbon Pipe with Coating Layer by Magnetostrictive Ultrasonic Guided Wave
Journal Title: 河南科技大学学报（自然科学版） - Year 2018, Vol 39, Issue 6
Abstract
The magnetostrictive senser ( Ms S) ultrasonic guided wave testing system was adopted for on-line detection of light hydrocarbon pipeline with coated layer. The effects of detection frequency and pipe diameters on the positioning accuracy of pipeline detection were studied. At the same time, the effects of epoxy resin with viscoelastic coating layer on guided wave signal were also analyzed by using three pass and elbow as the defect and reference. The pipes with diameter of 114 mm and 80 mm were detected by the 64 k Hz and 32 k Hz probes. The results shows that the detection accuracy of the pipeline is different with different detection frequency. The higher the frequency is, the higher the positioning accuracy is. The diameter of the pipe has important influences on positioning accuracy of the guided wave signal. The positioning accuracy of diameter80 mm pipe with 32 k Hz frequency is 9. 3 cm, which is much higher than the positioning accuracy 17. 6 cm of114 mm of diameter. The viscoelastic coating has strong attenuation of the detection signal. The average attenuation rate is about 1 d B/m.
Authors and Affiliations
Tao GU, Qiang WANG, Dong HU, Yongjun ZHAI
Keywords
Related Articles
- EP ID EP468448
- DOI -
- Views 50
- Downloads 0
Construction and Photoelectric Conversion Properties of WO3/BiVO4 Composite Film Photoelectrode
WO3 and BiVO4 semiconductor films eletrodes were prepared by polymer-assisted deposition method and metal-organic decomposition method, respectively. The band structures of WO3 and BiVO4 semiconductor films eletrode were...
Microstructure and Properties of Electrodeposited Coatings on Titanium Surface
WC coating and CoCr/WC coating were prepared on the surface of TA2 basis material by electro spark deposition. The morphology, surface roughness, thickness, phase composition, microhardness and relative wear resistance o...
Existence and Uniqueness of Solutions for Interval-valued Fractional Differential Equations with Time Delay
The properties and applications of a class of interval-valued fractional integro-differential equations with time delay were studied by analyzing the theory of fractional integro-differential equations with time delay an...
Design and Performance Analysis of Parallel Hybrid Electric Tractor Transmission Parameters
Aiming at the problems of excessive stalls number,complex operation and low traction efficiency of high power wheeled tractors,the relevant parameters of 132 k W parallel hybrid tractor power system,coupling systems and...
Research on Paired Approach Procedure to Closed Spaced Parallel Runways and its Collision Risk
The paired operation mode to closed spaced parallel runways were introduced to improve the running efficiency of the runway. The process of the two aircraft from the final approach to the entry point of the runway was sh...