Morphology and development dynamics of rolled steel products manufacturing defects during long-term operation in main gas pipelines

2020 ◽  
Vol 109 ◽  
pp. 104359 ◽  
Author(s):  
Dmitrii Zhukov ◽  
Sergey Konovalov ◽  
Alexei Afanasyev
Keyword(s):  
Rolled Steel ◽  
Gas Pipelines ◽  
Manufacturing Defects ◽  
Term Operation

Influence of the Long-Term Operation of Gas Pipelines on the Cyclic Crack-Growth Resistance of 17G1S Steel

2017 ◽  
Vol 52 (6) ◽  
pp. 827-833
Author(s):  
E. V. Kharchenko ◽  
S. Klysz ◽  
V. M. Palyukh ◽  
O. E. Kunta ◽  
T. M. Lenkovs’kyi
Keyword(s):  
Crack Growth ◽  
Crack Growth Resistance ◽  
Gas Pipelines ◽  
Term Operation ◽  
17G1s Steel

scholarly journals Impact of Long-Term Operation on the Reliability and Durability of Transit Gas Pipelines

2020 ◽  
Vol 70 (1) ◽  
pp. 115-126
Author(s):  
Okipnyi Igor ◽  
Poberezhny Lyubomyr ◽  
Zapukhliak Vasyl ◽  
Hrytsanchuk Andrii ◽  
Poberezhna Liubov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Fatigue ◽  
Static Loading ◽  
Physical And Mechanical Properties ◽  
Fatigue Tests ◽  
Gas Pipelines ◽  
Term Operation ◽  
Full Capacity ◽  
Corrosive Environments

AbstractCorrosion and corrosion-fatigue tests of the material of the pipeline, which was in operation for 41 years. It has been shown that prolonged operation reduces the parameters of resistance to fatigue and prolonged static loading in corrosive environments. It was established that the degradation of physical and mechanical properties is insignificant, Ukraine’s main gas pipelines are ready to operate at full capacity provided that timely monitoring measures are carried out.

Effect of Long Term Operation on Degradation of Material of Main Gas Pipelines

2014 ◽  
Vol 782 ◽  
pp. 279-283 ◽  
Author(s):  
Pavlo Maruschak ◽  
Roman Bishchak ◽  
Igor Konovalenko ◽  
Abdellah Menou ◽  
Janette Brezinová
Keyword(s):  
Digital Images ◽  
Main Pipeline ◽  
Gas Pipelines ◽  
Indentation Method ◽  
Term Operation ◽  
Metal Damage

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.

Physical and Mechanical Aspects of Corrosion Damage of Distribution Gas Pipelines After Long-Term Operation

2018 ◽  
Vol 18 (3) ◽  
pp. 562-567 ◽  
Author(s):  
Pavlo Maruschak ◽  
Lyubomyr Poberezny ◽  
Olegas Prentkovskis ◽  
Roman Bishchak ◽  
Andriy Sorochak ◽  
...  
Keyword(s):  
Corrosion Damage ◽  
Gas Pipelines ◽  
Term Operation

scholarly journals THE MAIN GAS PIPELINES DEFECTS ANALYZING BY OPERATION PERIOD AND EXTENSION

2019 ◽  
pp. 93-99
Author(s):  
S. V. Kitaev ◽  
N. M. Darsalia ◽  
I. R. Baykov ◽  
O. V. Smorodova
Keyword(s):  
Gini Index ◽  
Gas Pipeline ◽  
Pipeline System ◽  
Gas Pipelines ◽  
Line Pipe ◽  
Term Operation ◽  
Wide Range ◽  
Operation Period ◽  
Standard Service

The gas pipeline system of PJSC «Gazprom» is at the stage of long-term operation. Most of the pipelines exceed the standard service life of 33 years, while considerable resources are required to maintain the trunk gas pipelines in an efficient state. The article analyzes the defectiveness of gas mains by the example of LLC «Gazprom transgaz Ufa». The company’s gas pipeline system consists of a wide range of diameters pipes ranging from DN 400 to DN 1400 mm. Its structure is dominated by pipelines with a diameter of DN 400, 500, 700, 1400 mm, which share exceeds 86 %. An integral Gini index is proposed for monitoring the differentiation of defects along the length of the line pipe of the main gas pipelines. By the value of the proposed indicator, it is possible to analyze and compare the sections of gas pipelines among themselves, to identify the signs that affect the development of defects along the line pipe of the main gas pipelines.

MONITORING OF THE TOUGHNESS OF THE MATERIAL OF THE MAIN GAS PIPELINE AFTER LONG TERM OPERATION IN ARCTIC CONDITIONS

2019 ◽  
Vol 85 (6) ◽  
pp. 64-68
Author(s):  
A. M. Bol’shakov ◽  
A. V. Burnashev ◽  
V. M. Efimov
Keyword(s):  
Structural Reliability ◽  
Pipeline Steel ◽  
Experimental Studies ◽  
Gas Pipeline ◽  
Technical Diagnostics ◽  
Gas Pipelines ◽  
Limiting State ◽  
Limit Values ◽  
Term Operation

The problems of ensuring the reliability and safe operation of long-running hazardous industrial facilities, in particular gas pipelines, after 50 years of operation are considered. The goal of the work is developing a method for assessing metal embrittlement of long-running main gas pipelines (MG) using a non-destructive method for monitoring and improving operational reliability. Experimental studies of the samples of the pipes of the main gas pipelines revealed the parameters most sensitive to the processes of structural degradation. The applicability of those parameters to assessing the degree of degradation is substantiated. Analysis of the results of mechanical and acoustic studies revealed correlation with an essentially large value of the correlation coefficient. Based on this correlation, a method for assessing the toughness has been developed. The experimentally obtained limit values of the studied characteristics at which the operation of the structure becomes dangerous are presented. A flowchart has been developed for monitoring changes in the toughness of the gas pipeline steel after long-term operation. The experimental results and developed method for estimating the limiting state of the gas pipeline material were used during technical diagnostics of non-project sections of the Mastach — Berge — Yakutsk gas pipeline to determine real operational characteristics and form a database of the studied indicators for their further monitoring. The proposed method will improve the efficiency of accumulated information on the structural reliability and provide the possibility of assessing the degree of pipe metal degradation without conducting mechanical tests and making samples in the process of technical diagnostics thus reducing the material costs for conducting scheduled maintenance of the pipelines.

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