Failure of an ASTM A213 T12 steel tube of a circulating fluidized bed boiler

Silveira, Rosa Maria Sales da; Guimarães, Alessandra Vieira; Oliveira, Gláucio; Queiroz, Fábio dos Santos; Guzela, Laércio Rosignoli; Cardoso, Bruno Reis; Araújo, Leonardo Sales; Almeida, Luiz Henrique de

doi:10.1016/j.engfailanal.2023.107188

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…The weld corrosion failure is usually provoked by the potential difference between various materials after the liquid film covers the weld. In general, galvanic corrosion between two metals occurs when the potential difference (ΔE) is greater than 50 mV and becomes severe at ΔE > 250 mV [ 7 , 8 , 9 , 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Multi-Factor Stress Corrosion Cracking Failure of Safe-End Feedwater Lines of Submarine Power System

Ji,

Zheng,

Qin

et al. 2024

Materials

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The corrosion process under the complex safe-end feedwater line conditions was investigated via experimental lab testing and numerical simulation. The corrosion of safe-end feedwater lines was controlled through the combination of galvanic corrosion, residual stress, and flow velocity. Firstly, galvanic corrosion occurred once the 20 steel was welded with 316L stainless steel. The pitting corrosion could be observed on the 20 steel side of the weld joint. Secondly, a vortex flow was detected around the welding bump and within the pits. The growth of the pits was accelerated in both the vertical and horizontal directions. Finally, under the residual stress condition, the stress intensity factor (K) at the bottom of the pits was easier to reach than the critical stress intensity factor (KISCC). Then, pitting was transformed into stress corrosion cracking which then propagated along the weld line. Therefore, the critical factor inducing the failure of safe-end feedwater lines was the combined action of galvanic corrosion, residual stress, and flow velocity.

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Section: Introductionmentioning

confidence: 99%

Investigation of Multi-Factor Stress Corrosion Cracking Failure of Safe-End Feedwater Lines of Submarine Power System

Ji,

Zheng,

Qin

et al. 2024

Materials

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Failure Analysis of T91 Finish Superheater Tube in 660 MW Supercritical Thermal Power Plant

Mishra,

Mishra

2024

J. of Materi Eng and Perform

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A Novel Data Mining Framework to Investigate Causes of Boiler Failures in Waste-to-Energy Plants

Wang,

Jiang,

Kjellander

et al. 2024

Processes

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Examining boiler failure causes is crucial for thermal power plant safety and profitability. However, traditional approaches are complex and expensive, lacking precise operational insights. Although data-driven approaches hold substantial potential in addressing these challenges, there is a gap in systematic approaches for investigating failure root causes with unlabeled data. Therefore, we proffered a novel framework rooted in data mining methodologies to probe the accountable operational variables for boiler failures. The primary objective was to furnish precise guidance for future operations to proactively prevent similar failures. The framework was centered on two data mining approaches, Principal Component Analysis (PCA) + K-means and Deep Embedded Clustering (DEC), with PCA + K-means serving as the baseline against which the performance of DEC was evaluated. To demonstrate the framework’s specifics, a case study was performed using datasets obtained from a waste-to-energy plant in Sweden. The results showed the following: (1) The clustering outcomes of DEC consistently surpass those of PCA + K-means across nearly every dimension. (2) The operational temperature variables T-BSH3rm, T-BSH2l, T-BSH3r, T-BSH1l, T-SbSH3, and T-BSH1r emerged as the most significant contributors to the failures. It is advisable to maintain the operational levels of T-BSH3rm, T-BSH2l, T-BSH3r, T-BSH1l, T-SbSH3, and T-BSH1r around 527 °C, 432 °C, 482 °C, 338 °C, 313 °C, and 343 °C respectively. Moreover, it is crucial to prevent these values from reaching or exceeding 594 °C, 471 °C, 537 °C, 355 °C, 340 °C, and 359 °C for prolonged durations. The findings offer the opportunity to improve future operational conditions, thereby extending the overall service life of the boiler. Consequently, operators can address faulty tubes during scheduled annual maintenance without encountering failures and disrupting production.

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Failure of an ASTM A213 T12 steel tube of a circulating fluidized bed boiler

Cited by 3 publications

References 12 publications

Investigation of Multi-Factor Stress Corrosion Cracking Failure of Safe-End Feedwater Lines of Submarine Power System

Investigation of Multi-Factor Stress Corrosion Cracking Failure of Safe-End Feedwater Lines of Submarine Power System

Failure Analysis of T91 Finish Superheater Tube in 660 MW Supercritical Thermal Power Plant

A Novel Data Mining Framework to Investigate Causes of Boiler Failures in Waste-to-Energy Plants

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