V. G. Rybalko, D. V. Novgorodov, A. Yu. Surkov

CONSTRUCTING A MODEL OF THE INTERACTION OF CRACKS IN GAS PIPELINES

The article presents the results of studying a template with stress corrosion cracking defects. After magnetic particle inspection, a visual analysis of the revealed cracks is carried out in order to fix the traces of mutual influence, which lead to their merging into a common defect with further development. The research has revealed typical ways of crack coalescence, as well as some of their features, and this has allowed us to propose a model for constructing a plausible picture of crack interaction.

Acknowledgment: The work was performed within the state assignment from FASO Russia (the subject of Diagnostics, No. АААА-А18-118020690196-3)

References:

1.STO Gazprom 2-2.3-173–2007. Regulation for complex inspection and diagnosing of trunk gas pipelines subject to stress corrosion cracking. Moscow, Gazprom Expo Publ., 2008, 29 p. (In Russian).
2.Instruktsiya po otsenke defektov trub i soedinitelnykh detaley pri remonte i diagnostirovanii magistralnykh gazoprovodov [Instruction for the Evaluation of Defects in Pipes and Fittings during the Repair and Diagnosis of Main Gas Pipelines]. Moscow, OOO VNIIGAZ Publ., 2013, 117 p. (In Russian).
3.Alimov S.V., Dolgov I.A., Gorchakov V.A., Surkov Yu.P., Surkov A.Yu., Rybalko V.G. Diagnostika korrozionnogo rastreskivaniya gazoprovodov. Atlas [Diagnostics of Gas Pipelines Corrosion Cracking. Atlas]. Ekaterinburg, IMP UB RAS Publ., 2004, 84 p.
4.STO Gazprom 2-2.3-137–2007. Instruction on technologies of welding at construction and repair of field and main gas pipelines. Part 2. Moscow, Gazprom Publ., 2007, 177 p. (In Russian).
5.Broek D. Elementary Engineering Fracture Mechanics, Leyden, Noordhoff International Publishing, 1974, 312 p.

               

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