2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 11: Physics, Advanced/Multifunctional Materials, Composite, Quasi-crystals, Coating
| Editors: | Kongoli F, Marquis F, Lu L, Xia H, Masset P, Rokicki P |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 180 pages |
| ISBN: | 978-1-987820-56-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Study on the two-phase pipe flow action on the elbow with erosion,cavitation and corrosion
Li Bai1; Tingting Zhao2;1, Qingdao, China; 2CHINA UNIVERSITY OF PETROLEUM, qingdao, China;
Type of Paper: Regular
Id Paper: 409
Topic: 20
Abstract:
Sand is commonly produced along with oil and gas pipe. Elbow and Valve often face with the sand-fluid erosion induced to pipe wall thinning or leaking. To study the main mechanism of elbow erosion wear, solid-liquid two-phase flow circulation pipe tests were conducted with adding the 5 present quartz sand. The tests focused on observing the erosion and wear property of a group of carbon steel patches fixing up the pipe elbow with grouping according to particles size after 2~3 hours. The weight loss method was applied to accounting the erosion rate. And then the scanning electron microscopy was employed to study patches damage morphology. The furrows, indentation and scratch, even the circle pits were found on the most of the patches after the eroding. These were shown that some percent iron oxide existing according to energy dispersive spectrum analysis (EDS). It is obvious that the main damage mechanics not only included cutting, extrusion and secondary impact due to elbow fluid field, but also existed the shock wave causing by bubble collapsed on the patch and coexisted corrosion mechanisms. These mechanisms influence are different in the elbow region which was affected by the particle sizes. The test and numerical analysis show that damage mechanism is controlled by erosion of the outer arch wall of the elbow, while cavitation and corrosion are dominant on the inner arch wall of the elbow.