Journal ArticleDOI
Effect of Long Term Operation on Degradation of Material of Main Gas Pipelines
TLDR
In this paper, the mechanisms of metal damage in the pipe of the main pipeline are investigated, the main reasons for their appearance are found and analysed, and the main results are obtained by joint use of metallography, indentation, method for processing and analysis of digital images.Abstract:
The mechanisms of metal damage in the pipe of the main pipeline are investigated, the main reasons for their appearance are found and analysed. The main results are obtained by joint use of metallography, indentation, method for processing and analysis of digital images.read more
Citations
More filters
Journal ArticleDOI
Thermo-mechanical modeling of a high pressure turbine blade of an airplane gas turbine engine
TL;DR: In this paper, a model using the finite element method (FEM) was developed, in order to predict the creep behavior of high pressure turbine (HPT) blades, and the overall expected behaviour in terms of displacement was observed, in particular at the trailing edge of the blade.
Journal ArticleDOI
Defectiveness of external and internal surfaces of the main oil and gas pipelines after long-term operation
TL;DR: In this article, the basic laws of structural and mechanical degradation were established using optical and scanning electron microscopy, and the shape of defects and substantiated morphological characteristics were examined.
Journal ArticleDOI
Feature of stress corrosion cracking of degraded gas pipeline steels
TL;DR: In this article, the authors analyzed the SCC behavior of in-service and in-laboratory degraded gas pipeline steels and revealed some fractographic features of stress corrosion cracking.
Journal ArticleDOI
Non-destructive evaluation of brittle fracture resistance of operated gas pipeline steel using electrochemical fracture surface analysis
TL;DR: In this article, a non-destructive evaluation technique based on electrochemical analysis of fracture surface for assessing in-service degradation degree of operated pipeline steels was developed, and a significant difference between open-circuit potentials of the fracture surface (brittle fracture) and the polished surface of specimens made of operated pipe steels observed after their long-term operation was associated with increased content of carbon compounds on the fracture surfaces.
Journal ArticleDOI
Mechanical Properties of Gas Main Steels after Long-Term Operation and Peculiarities of Their Fracture Surface Morphology
Volodymyr Hutsaylyuk,Pavlo Maruschak,Ihor Konovalenko,Sergey V. Panin,Roman Bishchak,Mykola Chausov +5 more
TL;DR: It is shown that the fracture surface consists of sections of ductile and localized zones of micro-spalling, which testifies to the hydrogen-induced embrittlement effect and the steels under investigation possess sufficiently high levels of the mechanical properties required for their further safe exploitation, both in terms of durability and cracking resistance.
References
More filters
Journal ArticleDOI
Stress corrosion cracking of X80 pipeline steel in simulated alkaline soil solution
TL;DR: The stress corrosion cracking susceptibility of X80 steel under applied cathodic potentials in a simulated soil solution was investigated using slow strain rate tensile tests in this article, where the fracture surfaces were observed by scanning electron microscopy.
Journal ArticleDOI
Environmentally assisted “in-bulk” steel degradation of long term service gas trunkline
Hryhoriy Nykyforchyn,E. Lunarska,O. T. Tsyrul’nyk,K. Nikiforov,M.E. Genarro,Giovanna Gabetta +5 more
TL;DR: In this paper, an analysis of a change of the mentioned characteristics together with the results of hydrogen permeation and vacuum hydrogen extraction measurements indicate considerable material degradation of trunk pipeline steel after long term service and essential role of hydrogen in these processes.
Journal ArticleDOI
Effect of the long‐term service of the gas pipeline on the properties of the ferrite–pearlite steel
TL;DR: In this paper, a thorough mechanical, corrosion-mechanical, hydrogen permeation studies of X52 steel in as-received condition and after 30 years of service in gas pipeline have shown the degradation of the bulk metal properties due to the exploitation.
Journal ArticleDOI
Specific features of hydrogen-induced corrosion degradation of steels of gas and oil pipelines and oil storage reservoirs
TL;DR: In this article, the authors analyzed general regularities of degradation of the mechanical and corrosion-mechanical properties of steels of oil and gas main pipelines and oil storage reservoirs after 28-40 years of operation.