| 2012 №03 (04) | 2012 №03 (06) |
The Paton Welding Journal, 2012, #3, 20-25 pages
IMPROVEMENT OF RELIABILITY OF MAIN GAS PIPELINES BY USING REPEATED IN-PIPE FLAW DETECTION
D.P. VARLAMOV1, V.N. DEDESHKO1, V.A. KANAJKIN2 and O.I. STEKLOV2
1Closed Joint Stock Company «Research and Production Association «Spetsmash», Moscow, RF
2Gubkin Russian State University of Oil and Gas, Moscow, RF
Abstract
It is shown that the presence of a large number of abnormalities in welded joints is hazardous for safe operation of the system of main gas pipelines not only because of the probability of failure of the welded joints, but also because of formation of an additional factor, i.e. initiation and propagation of stress corrosion cracking defects in a zone of intersection of longitudinal and circumferential welds.
Keywords: welded pipelines, integrity, in-pipe flaw detection, general and local corrosion, stress corrosion cracking, abnormal circumferential welded joints
Received: 03.10.11
Published: 28.03.12
References
1. Mazur, I.I., Ivantsov, O.M. (2004) Safety of pipeline systems. Moscow: Elina.
2. Steklov, O.I. (1990) Resistance of materials and structures to stress corrosion. Moscow: Mashinostroenie.
3. Kanajkin, V.A. (2009) In-pipe magnetic flow detection of main pipelines. Ekaterinburg: UrO RAN.
4. Varlamov, D.P., Kanajkin, V.A., Matvienko, A.F. (2008) Monitoring of defects in main gas pipelines. Ekaterinburg: UrO RAN.
5. Varlamov, D.P., Kanajkin, V.A., Matvienko, A.F. et al. (2010) Analysis of stress corrosion defects in main gas pipelines. Ekaterinburg.