Assessing the significance of corrosion in onshore oil and gas pipelines

Hopkins, P.

doi:10.1533/9780857099266.1.62

Cited by 8 publications

(2 citation statements)

References 10 publications

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“…The width w growth rate in the defect area is calculated based on the empirical equation for length growth rate, with a length-to-width ratio of 0.2, i.e., the width d is 0.6 mm/a. Then, the non-conservative Equation (20) proposed by Hopkins is used to correct the length and width growth rates, as they previously pointed out that the precise calculation of the cross-sectional area of the corrosion zone was overly conservative [47]:…”

Section: (A) Corrosion Prediction Analysismentioning

confidence: 99%

Reliability Analysis of the Deep-Sea Horizontal Clamp Connector Based on Multi-Source Information from an Engineering Background

Liu

Yun

Wang

et al. 2023

JMSE

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As a key piece of equipment in underwater production system, a reliability study of deep-sea connectors has important theoretical significance and engineering value for increasing fault-free operation time, improving engineering safety, and reducing maintenance costs. However, the diverse failure modes of connectors and the lack of high-quality and credible reliability data can lead to biased analysis outcomes. To tackle this problem, this study aims to establish a reliability model for deep-sea horizontal clamp connectors. Based on the actual engineering background, a fault tree model for deep-sea horizontal clamp connectors is developed, and the distribution types of bottom events are analyzed concerning the failure mechanism. To enhance the model’s credibility, a multi-source information approach is employed, combining prior product information, expert experience, and design information to quantitatively solve the reliability probability of the connector. The expert experience is quantified using the fuzzy quantitative analysis method, while the design information is estimated by developing a corrosion prediction model combined with grey theory. Thus, the reliability assessment of deep-sea horizontal clamp connectors is completed. Factory Acceptance Test (FAT) is performed on the improved connectors, and the closed-loop work of reliability analysis is completed.

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Section: (A) Corrosion Prediction Analysismentioning

confidence: 99%

Reliability Analysis of the Deep-Sea Horizontal Clamp Connector Based on Multi-Source Information from an Engineering Background

Liu

Yun

Wang

et al. 2023

JMSE

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“…Its transportation from fields to final consumers profoundly relies on high pressure pipelines with current global total length given as over 3500000 km [1]. However, the detrimental impacts of corrosion in these pipelines have been a prevailing issue for the industry for many years.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Imidazoline in Mitigating Transport Pipeline Corrosion

Akindeju¹,

Obanijesu²,

Boyanich³

et al. 2017

Struct Chem Crystallogr Commun

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The detrimental effects of corrosion in transportation pipelines have been a primary issue for the oil and gas industry for many years. Every year, millions of dollars are invested into corrosion inhibitors in order to minimise corrosions implication on flow assurance. Imidazoline and its derivatives have been a prevalent corrosion inhibitor owing to its good adsorption characteristics and film forming capabilities; however, there remains some uncertainty in literature pertaining to the effect of temperature on its performance. GULP simulation software was used to study the effect of temperature on the thermodynamic properties of imidazoline in carbon steel pipelines. Entropy, heat capacity, Helmholtz free energy, entropy and Gibbs free energy were influenced by changes in temperature. An optimal operating range was found to exist between 298K and 333K. Within this range, spontaneous chemisorption was occurring and the imidazoline molecules possessed enough kinetic energy to displace any bound water on the metal surface to permit the preferential adsorption of the imidazoline head group. However, beyond 333K, the kinetic energy of the system hindered the steady formation of the protective barrier, reducing its inhibitive potential. This study agrees with previous literature on the effect of temperature on the ability of imidazoline as a corrosion inhibitor, however further studies into the effect of pipeline conditions and imidazoline molecular structure are needed in order to affirm the optimal applicability of imidazoline as a corrosion inhibitor.

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Reliability of the conventional approach for stress/fatigue analysis of pitting corroded pipelines – Development of a safer approach

Mokhtari

Melchers

2020

Structural Safety

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Assessing the significance of corrosion in onshore oil and gas pipelines

Cited by 8 publications

References 10 publications

Reliability Analysis of the Deep-Sea Horizontal Clamp Connector Based on Multi-Source Information from an Engineering Background

Reliability Analysis of the Deep-Sea Horizontal Clamp Connector Based on Multi-Source Information from an Engineering Background

Effectiveness of Imidazoline in Mitigating Transport Pipeline Corrosion

Reliability of the conventional approach for stress/fatigue analysis of pitting corroded pipelines – Development of a safer approach

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