Experimental Determination of Fracture Toughness of Girth Weld in Gas Pipelines using Unloading Compliance Method

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ASGHARI V.; CHOUPANI N.A.; HANIFI M.

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Paper Information

Journal: JOURNAL OF MECHANICAL ENGINEERING Year:2018 | Volume:48 | Issue:2 (83) Page(s): 11-18

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Title

Experimental Determination of Fracture Toughness of Girth Weld in Gas Pipelines using Unloading Compliance Method

Author(s)

ASGHARI V. | CHOUPANI N.A. | HANIFI M. | Issue Writer Certificate

Keywords

Natural Gas Transmission Pipelines

Girth Weld

Fracture Toughness

Unloading Compliance Method

Abstract

Structural integrity assessments of pipelines play a key role in the design and safe operation of these structures. Pipelines are sometimes subjected to bending and tensile deformations, which places the Girth Welds in tension. Girth Welds may contain weld imperfections and small flaws. Therefore, assessment of Girth Weld resistance against crack propagation and fracture is very important. In this study, the KIC toughness has been determined for Girth Weld metal of API X65 gas pipeline, following the ASTM E1820 standard. The Fracture Toughness tests employed side grooved and fatigue pre cracked compact tension specimens, which were made by plates extracted from the original pipe and welded to each other under the same welding condition as that employed for Girth Welding during construction of main natural gas transmission pipeline in Iran, to determine the crack growth resistance curves based upon the Unloading Compliance Method using the single specimen technique. From these, KIC value of 166 MPam1/2 was obtained for Girth Weld metal.

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APA: Copy

ASGHARI, V., CHOUPANI, N.A., & HANIFI, M.. (2018). Experimental Determination of Fracture Toughness of Girth Weld in Gas Pipelines using Unloading Compliance Method. JOURNAL OF MECHANICAL ENGINEERING, 48(2 (83) ), 11-18. SID. https://sid.ir/paper/270016/en

Vancouver: Copy

ASGHARI V., CHOUPANI N.A., HANIFI M.. Experimental Determination of Fracture Toughness of Girth Weld in Gas Pipelines using Unloading Compliance Method. JOURNAL OF MECHANICAL ENGINEERING[Internet]. 2018;48(2 (83) ):11-18. Available from: https://sid.ir/paper/270016/en

IEEE: Copy

V. ASGHARI, N.A. CHOUPANI, and M. HANIFI, “Experimental Determination of Fracture Toughness of Girth Weld in Gas Pipelines using Unloading Compliance Method,” JOURNAL OF MECHANICAL ENGINEERING, vol. 48, no. 2 (83) , pp. 11–18, 2018, [Online]. Available: https://sid.ir/paper/270016/en

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