A new method for assessment of burst pressure capacity of corroded X80 steel pipelines containing a dent

Zhao, Jian; Lv, Yunrong; Cheng, Y. Frank

doi:10.1016/j.ijpvp.2022.104742

Cited by 13 publications

(2 citation statements)

References 51 publications

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“…Three steps were contained in FE modeling in this work, i.e., denting, loading of internal pressure and H atom diffusion. As described previously (Zhao et al 2022), during denting to obtain a dent on an X52 steel pipe body, a spherical rigid indenter with a constant diameter of 100 mm was applied on a quarter pipe segment model, as shown in Fig. 1a.…”

Section: Analysis Of Multi-physics Field Coupling Effectmentioning

confidence: 99%

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Finite element modeling of the hydrogen atom distribution on dented pipeline for hydrogen transport under cyclic loading

Zhao

Cheng

2023

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Repurposing existing natural gas pipelines for hydrogen transport requires an accurate assessment of the distribution of hydrogen (H) atoms at surface defects such as dents under frequent pressure fluctuations encountered on gas pipelines. In this work, a 3-dimensional finite element-based model was developed to determine the stress/strain and H atom concentrations at an unconstrained dent on an X52 steel pipe experiencing denting, spring-back and cyclic loading processes. As expected, a stress/strain concentration generates at the dent center, while the cyclic loading reduces the stress level and shifts the stress concentration zone from the dent center along the circumferential direction. As the dent depth increases, the maximum H atom concentration is further shifted from the dent center to the side. A coincident relationship between the maximum H atom concentration, von Mises stress, hydrostatic stress and plastic strain does not exist. Pressure fluctuations decrease both the stress and H atom concentrations, providing a beneficial effect on reduced risk of the dented pipelines to hydrogen embrittlement in high-pressure hydrogen gas environments. Further analysis shows that the indenter size has little influence on the H distribution in the dent area.

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Section: Analysis Of Multi-physics Field Coupling Effectmentioning

confidence: 99%

“…For the existing natural gas pipelines containing dents on the pipe body, a complex stress-strain field is generated at the dent area (Tiku et al 2012;Shuai et al 2018;Luo et al 2020;Zhao et al 2022). Generally, the burst pressure of pipelines is not affected by dents (Shuai et al 2018).…”

Section: Introductionmentioning

confidence: 99%