A calculation method for limit load of the gas pipelines with girth weld surface cracks

Wang, Xu; Shuai, Jian

doi:10.1016/j.ngib.2019.03.004

Cited by 11 publications

(2 citation statements)

References 9 publications

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“…When the delayed brittle fracture of metal is caused by the combined action of corrosion and tensile stress in sulfide solution, and the the stress is much less than the yield strength, which is called SSC. It is difficult to monitor and prevent, so hydrogen sulfide corrosion has become a technical problem in the material field worldwide [7][8]. In order to improve the HIC and SSC resistance of low temperature steel pipes, researchers first use the regulation of V, Ti and other microalloy elements to reduce the impact of inclusions, and then use appropriate smelting, rolling and heat treatment processes to optimize the microstructure to refine grains, improve the purity of steel, reduce S and P content, control the number and morphology of non-metallic inclusions [9][10][11], reduce the impact of inclusions, supplemented by appropriate smelting, rolling and heat treatment processes, Finally, the steel pipe with corrosion resistance and low temperature impact performance meeting the standards and operating requirements is obtained.…”

Section: Introductionmentioning

confidence: 99%

Effect of Normalizing on Impact and Corrosion Resistance of Low-temperature Service Seamless Steel Pipe

Zhao

Yuan

et al. 2023

J. Phys.: Conf. Ser.

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The seamless line pipe, which has fine low temperature impact properties for Low-temperature Service and good H2S corrosion resistance, was investigated through chemical composition designing, optimizing smelting-rolling processes, and heat treatment processes following ASTM A333 standard. The influence of normalizing on the impact property and corrosion resistance was studied by optical microscope, scanning electron microscope, transmission electron microscope, mechanical test and corrosion test. It is demonstrated that the low temperature mechanical properties and anti-H2S corrosion properties of hot-rolled trial-pipe and normalized trial-pipe meet ASTM A333 standard. The microstructure of hot-rolled trial-pipe is pearlite and ferrite, and the grain distribution is uniform and grain size is fine. The dominated precipitates phase are TiN particles in hot-rolled trial-pipe. Ductile to brittle transition temperature is determined at -60 °C. The grain refinement is achieved after normalized and the main precipitates are TiN particles together with a few VN particles. Ductile tobrittle transition temperature was further lowered, at - 80 °C. The corrosion behavior of the material was examined by hydrogen induced cracking (HIC) corrosion test, sulfide stress corrosion (SSC) test and polarization test at various polarization scanning rates. It is observed that the anti-HIC corrosion performance and SSC corrosion resistance are similar for both hot-rolled and normalized pipes, but the performance of electrochemical corrosion of normalized pipe is better than hot-rolled pipe, which indicates that the normalized pipe is more suitable for demanding corrosive environments.

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Section: Introductionmentioning

confidence: 99%

Effect of Normalizing on Impact and Corrosion Resistance of Low-temperature Service Seamless Steel Pipe

Zhao

Yuan

et al. 2023

J. Phys.: Conf. Ser.

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“…В работах [5-7] проводится анализ причин разрыва труб по сварным швам, непосредственно приведшим к авариям. Выполнен ряд работ [8,9] по построению методов расчета и оценки безопасности сварных соединений с внутренними дефектами методом конечных элементов, в т. ч. для коррозионных повреждений [10]. В работах [11-14] представлены испытания и анализ изломов швов различной конфигура-ции, включая швы со смещением кромок, швов нахлесточного типа и со следами деформации.…”

Section: Introductionunclassified