Degradation of the main gas pipeline material and mechanisms of its fracture

Abstract

The effect of the in-service scattered damage in the pipe wall metal is evaluated, and the effect of hydrogen absorbed by metal on the variation of the structure and mechanical properties of the main gas pipeline after a long-term operation is found. The main regularities in the graded nature of the static deformation process and the effect of hydrogenation on the scattered damage and fracture accumulation are found.

Keywords:

• fracture
• failure
• structural damage
• strain localisation
• hydrogenation
• degradation
• gas pipeline

Additional information

Notes on contributors

Pavlo Maruschak

Pavlo MARUSCHAK. Doctor, Professor, Department of Industrial Automation, Ternopil National Ivan Pul'uj Technical University, Ukraine. Research interests: transport engineering, pipeline transport, industrial transport, sea and air transport.

Iryna Danyliuk

Iryna DANYLIUK. Post-graduate student, Department of Industrial Automation, Ternopil National Ivan Pul'uj Technical University, Ukraine. Research interests: transport engineering, pipeline transport, industrial transport, sea and air transport, industrial automation.

Olegas Prentkovskis

Olegas PRENTKOVSKIS. Doctor, Professor, Department of Transport Technological Equipment, Vilnius Gediminas Technical University, Lithuania. Research interests: vehicles dynamics, simulation of traffic accidents, traffic safety problems, transport infrastructure, numerical methods, pipeline transport.

Roman Bishchak

Roman BISHCHAK. Doctor, Assistant professor, Department of Welding of Main Pipelines, Ivano-Frankivsk National Technical University of Oil and Gas, Ukraine. Research interests: fatigue, fracture mechanics, welding, oil pipelines, pipeline operation, protection, inspection and maintenance.

Andriy Pylypenko

Andriy PYLYPENKO. Doctor, Assistant professor, Department of Strength of Materials, National University of Life and Environmental Sciences of Ukraine, Ukraine. Research interests: gas transportation systems, in-service defects analysis, fracture mechanics.

Andriy Sorochak

Andriy SOROCHAK. Lecturer, Department of Civil Engineering, Ternopil National Ivan Pul'uj Technical University, Ukraine. Research interests: structural and fractographic analysis, fracture mechanics, microscopy and microanalysis.