Influence of the interpass temperature on the microstructure and mechanical properties of the weld metal (AWS A5.18 ER70S-6) of a narrow gap welded API 5L X70 pipe joint

Dornelas, Paulo Henrique Grossi; Filho, João da Cruz Payão; Farias, Francisco Werley Cipriano; Oliveira, Victor Hugo Pereira Moraes e; Moraes, Diogo de Oliveira; Júnior, Petrônio Zumpano

doi:10.1016/j.ijpvp.2022.104690

Cited by 9 publications

(1 citation statement)

References 31 publications

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“…This indicates that the materials used for gas pipelines must meet requirements not only in terms of the chemical composition of natural gas, but also other gaseous media that can ultimately be transported through such pipelines [3], affecting their corrosion conditions [4,5]. Hence, there are tendencies to change the approach in the field of materials used for pipelines, but also in the technology of their connection [6,7]. The dominant technology for connecting high-pressure gas pipelines is welding.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Microstructure and Mechanical Properties of the Butt-Welded Joints of Spiral Pipes Made of L485ME (X70) Steel

Tuz

2023

Materials

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The expansion of the gas pipeline network makes it necessary, on the one hand, to meet the requirements of standards regarding the materials used, but on the other hand, it is necessary to weld them. In the case of natural gas as a fuel, the welding process is widely used, but in the case of replacing natural gas with a mixture of this gas and hydrogen, the requirements regarding the quality of the process must be significantly increased or the process must be completely changed. This article presents the results of testing welded joints for a newly developed welding technology for the transmission of a hydrogen mixture. Material tests were carried out on a butt-circumferential-welded joint made between two spiral pipes with an outer diameter of 711 mm and wall thickness of 11 mm in the X70 grade. The developed welding technology is distinguished by a change in the beveling method of the edges, which allows the heat input to the material to be limited. The technology was developed for use in natural on-shore and off-shore gas pipelines with the addition of hydrogen. As a result, additional requirements in terms of joint plasticity had to be met during welding. The test results obtained indicate that the joints are characterized by high strength (more than 581 MPa), higher than that of the base material (fracture in the base material) and good impact strength at reduced temperature (more than 129 J). In transverse corrosion, a hardness below 250 HV and a favorable structure of ferrite with different morphologies were obtained.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Microstructure and Mechanical Properties of the Butt-Welded Joints of Spiral Pipes Made of L485ME (X70) Steel

Tuz

2023

Materials

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Effect of Inter-pass Layer Temperatures on Microstructure and Mechanical Properties of Inconel 625 Fabricated Using Wire and Arc Additive Manufacturing

Karmuhilan,

Kumanan

2024

J. of Materi Eng and Perform

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Mechanical Anisotropy and Failure Analysis of Inconel 625 Parts Manufactured Using Wire and Arc Additive Manufacturing (WAAM)

Karmuhilan,

Kumanan

2024

J Fail. Anal. and Preven.

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Influence of the interpass temperature on the microstructure and mechanical properties of the weld metal (AWS A5.18 ER70S-6) of a narrow gap welded API 5L X70 pipe joint

Cited by 9 publications

References 31 publications

Evaluation of the Microstructure and Mechanical Properties of the Butt-Welded Joints of Spiral Pipes Made of L485ME (X70) Steel

Evaluation of the Microstructure and Mechanical Properties of the Butt-Welded Joints of Spiral Pipes Made of L485ME (X70) Steel

Effect of Inter-pass Layer Temperatures on Microstructure and Mechanical Properties of Inconel 625 Fabricated Using Wire and Arc Additive Manufacturing

Mechanical Anisotropy and Failure Analysis of Inconel 625 Parts Manufactured Using Wire and Arc Additive Manufacturing (WAAM)

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