Analysis of Leakage Cause of L415M Spiral Submerged Arc Welding Pipe

Xu, Yuanxi; Liu, Yinglai; Xianghui, Nie; Feng, Zhen; Li, Liang; Yang, Fengping

doi:10.1051/e3sconf/202132901071

Cited by 3 publications

(3 citation statements)

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“…It can buffer the tension, compression stress, and torque action attached to the straight section, such as formation migration, earthquake, and external temperature change in the area where the pipeline is located [1][2][3][4]. Because of its unique structure and complicated force state in use, the bend pipe is one of the weakest links in the oil and gas transmission pipeline system [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Cause analysis of leakage failure of an induction heating bend pipe in a gas pipeline

Xu,

Liu,

Bai

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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As an important part of oil and gas pipelines, the quality and safety of bend pipes affect the safe operation of pipelines. In this paper, a case of a bending pipe leakage accident was tested and analyzed. Through non-destructive testing, physical and chemical property inspection, and defect anatomy analysis, it was found that the bending section of the bending pipe did not meet the standard requirements and the material was hard and brittle. It is concluded that the leakage of the bend pipe belongs to low-stress brittle failure. The main reasons for the failure of the bend pipe are improper material selection and unreasonable heating process, a hard and brittle martensitic structure formed in the bending section, deformation, and reduced bearing capacity.

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Section: Introductionmentioning

confidence: 99%

Cause analysis of leakage failure of an induction heating bend pipe in a gas pipeline

Xu,

Liu,

Bai

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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“…Almost all long-distance oil and gas pipelines and station facilities pipelines are completed by the welding process. Welding quality directly affects the safety of pipelines and station facilities along the line [1][2][3][4][5][6][7] . According to statistics, most of the pipeline failure cases are caused by girth weld defects, and the more complex the butt structure, the greater the probability of failure.…”

Section: Introductionmentioning

confidence: 99%

Quality inspection and defect analysis of girth weld in oil and gas long-distance pipeline

Xu¹,

Wu²,

Nie³

et al. 2023

International Conference on Optoelectronic Materials and Devices (ICOMD 2022)

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To find out the causes of the girth weld defects in pipeline inspection and verify the weld quality, this paper implements the methods of radiographic inspection, mechanical inspection, and metallographic inspection to carry out experimental tests. The results show that the girth weld has good tensile property, poor impact toughness, reasonable distribution of hardness value, larger cover welding of the weld at 6 o 'clock position, repair welding phenomenon exists at the bottom welding position, and the crack originates from the groove of the bottom welding is non-fusion defect, which is not cleared in time during repair welding, and eventually expands to the filler welding metal, forming a crack.

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“…The defects arise from the production of pipes, and the characteristics of the defects are different at different stages of manufacture. Therefore, it is of great significance to analyze the characteristics of defects, find out the causes of defects and take necessary quality assurance measures to improve the quality of pipes and ensure the safety of pipeline operation [1][2][3][4][5][6][7]. Ф325 mm × 10 mm 20 steel seamless steel pipe was produced by a factory in 2013.…”

Section: Introductionmentioning

confidence: 99%

Cause Analysis of Leakage Failure of Seamless Steel Pipe during Pipeline Pressure Test

Xu,

Nie,

Feng

et al. 2023

J. Phys.: Conf. Ser.

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By means of chemical analysis, tensile test, metallographic analysis, and energy spectrum analysis, the leakage causes of seamless steel pipe in the process of pipeline pressure test were analyzed. The analysis shows that the crack of steel pipe appears before rolling, and the non-metallic inclusions near the crack are the crack source or preferred path of steel pipe cracking. The leakage of steel pipe defects in the subsequent eddy current and ultrasonic inspection is one of the main reasons the unqualified steel pipe flows into the construction site and leads to the leakage of the pressure test.

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Analysis of Leakage Cause of L415M Spiral Submerged Arc Welding Pipe

Cited by 3 publications

References 0 publications

Cause analysis of leakage failure of an induction heating bend pipe in a gas pipeline

Cause analysis of leakage failure of an induction heating bend pipe in a gas pipeline

Quality inspection and defect analysis of girth weld in oil and gas long-distance pipeline

Cause Analysis of Leakage Failure of Seamless Steel Pipe during Pipeline Pressure Test

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