Fatigue life of pipelines with dents and gouges subjected to cyclic internal pressure
Book
·
OSTI ID:160818
- Stress Engineering Services, Inc., Houston, TX (United States)
Research has been conducted to study the effects of dents, gouges, and weld seams on pipelines under cyclic internal pressure loading. The work has involved pipes experimentally with D/t ratios from 18 to 94 and theoretically via finite element analysis with D/t ratios from 18 to 100. According to both the experimental and theoretical work, plain smooth dents whose diameter is less than 5% of the pipe diameter should not be a problem, assuming that the cyclic pressure loading is not extreme. The experimental work indicated that gouge depth was an important factor in reducing the pipeline fatigue life; however, grinding was found to be a suitable form of repair for this defect. Categorizing gouges based on depth to wall thickness (d/t) was proven to be an effective means of classification. An analytical method was developed to predict the fatigue life of pipes subjected to cyclic internal pressure. The values are then compared to the experimentally obtained values.
- OSTI ID:
- 160818
- Report Number(s):
- CONF-950116--; ISBN 0-7918-1292-8
- Country of Publication:
- United States
- Language:
- English
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