Abstract
The analysis of causes of destruction of main gas pipelines for the last two decades is carried out. It is shown that the share of accidents because of corrosion cracking energized increases. The conclusion is drawn that inspection and repair of emergency sites has to become a paramount task. It will allow to reach considerable decrease in accident rate. At the same time the extent of emergency sites of gas pipelines with a diameter of 1420 mm is about 1700 km, 1220 mm – 1000 km; 1020 mm – 400 km that, generally, makes 2.3% of the total extent of gas pipelines of the corresponding diameters (1020-1420 mm).
Highlights
The analysis of causes of destruction of main gas pipelines for the last two decades is carried out
Analysis of accident statistics of gas pipelines [1 - 4] shows that accident rate of gas pipelines stabilized or decreased for all reasons except corrosion cracking of pipes under stress (SCC or stress corrosion)
The accident rate of gas pipelines due to SCC began to increase sharply and over the period 1996-2017, the number of these accidents amounted to 38% of the total number of accidents
Summary
The analysis of causes of destruction of main gas pipelines for the last two decades is carried out. Analysis of accident statistics of gas pipelines [1 - 4] shows that accident rate of gas pipelines stabilized or decreased for all reasons except corrosion cracking of pipes under stress (SCC or stress corrosion).
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