Analysis of stress-strain state and safe exploitation of pipeline section with a conic adapter
The relevance. The features of conical adapter geometric characteristics in oil and gas industry pipeline system under the condition of internal pressure action lead to the appearance of sufficiently high stresses in the sections of connection of an adapter with a pipeline, in some cases exceeding t...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Tomsk Polytechnic University
2018-08-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya-tpu.ru/archive/article/view/2077 |
| Summary: | The relevance. The features of conical adapter geometric characteristics in oil and gas industry pipeline system under the condition of internal pressure action lead to the appearance of sufficiently high stresses in the sections of connection of an adapter with a pipeline, in some cases exceeding the normative values. This makes it necessary to analyze the influence of the geometric characteristics of the pipeline and the conical adapter, the internal pressure on the level of strained/deformed state of the structure, and develop a proposal for recommendations on ensuring the safety of operation of pipelines with a conical adapter. The main aim of the research is the evaluation of the effect of the conical adapter design parameters on the level of mechanical stresses in the pipeline and the development of recommendations for ensuring the strength and safety of pipeline sections with a conical adapter. Object of the research is the section of the pipeline with a conical adapter. Methods of the research are the theoretical studies of the stress-strain state and exploitation safety of pipeline sections with a conical adapter under conditions of internal pressure. Results. The authors have evaluated the effect of the geometric characteristics of the pipes and the conical adapter on the stress level and the exploitation safety of the pipeline under the effect of internal pressure and proposed the recommendations for improving the safety of sections of pipelines with a conical adapter. Conclusions. The presence of conical adapters results in increasing level of pipeline wall mechanical stresses up to 3,3 times in the real operating conditions of oil and gas pipeline systems industry. The level of mechanical stresses is significantly influenced by the ratio of the thickness of the walls of the pipeline and the conical adapter, generatrix adapter inclination angle and the pipeline cavity pressure. Increasing the safety margin and safety of operation of pipeline sections with a tapered adapter can be achieved by connecting the adapter with the pipeline through straight inserts, taking the walls of the adapter and inserts equal in thickness, while ensuring the strength of the pipeline and the adapter at the same level. |
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| ISSN: | 2500-1019 2413-1830 |