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2009 №05 (09) 2009 №05 (02)

The Paton Welding Journal 2009 #05
TPWJ, 2009, #5, 2-7 pages  
ANALYSIS OF CONDITIONS CAUSING INITIATION AND PROPAGATION OF CORROSION CRACKS IN ZONES OF CIRCUMFERENTIAL JOINTS ON MAIN GAS PIPELINES


Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 5, 2009 (May)
Pages                      2-7
 
 
Authors
V.I. AKHNENKO, V.M. SHEKERA, E.A. VELIKOIVANENKO, O.I. OLEJNIK, G.F. ROZYNKA and N.I. PIVTORAK

E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
The paper deals with conditions causing formation of corrosion cracks within the zones of circumferential field and longitudinal factory welded joints on main gas pipelines. Described is the case study of force conditions and resistance of material to initiation and propagation of stress corrosion cracks up to a spontaneous fracture.
 
 
Keywords: welded main gas pipelines, circumferential welded joints, initiation and propagation of corrosion cracks, crack resistance diagram, nominal stresses, stress concentration, stress intensity factors
 
 
Received:                25.11.08
Published:               28.05.09
 
 
References
1. Andrejkiv, O.E., Kushnir, R.M., Tsyrulnyk, O.T. (2006) Determination of residual life of oil pipeline allowing for defects present in its wall and real service conditions. In: Problems of life and service safety of structures, constructions and machines. Kiev: PWI.
2. Makhnenko, V.I., Shekera, V.M., Onoprienko, E.M. (2008) Determination of parameters of simplified diagram of static corrosion crack resistance for pipe steels in soil corrosion. The Paton Welding J., 10, 26-30.
3. Makhnenko, V.I. (2006) Safe service life of welded joints and assemblies on current structures. Kiev: Naukova Dumka.
4. Romanenko, S.V. (2008) Analysis of the causes of fracture of main gas pipeline in transverse direction. Gaz. Promyshlennost, 1, 55-57.
5. (2000) Fitness-for-service: Recommended practice 579. Washington: American Petroleum Institute.