Full-scale rupture tests were conducted on 508 mm (20 in) diameter API X-60 5,7 mm wall thickness pipes containing either axial semi-elliptical cracks or simulated corrosion defects with equivalent depths ranging from 20 to 60 percent of thickness. In the case of the cracks, the failure pressures were predicted with reasonable accuracy when considering a level 3 failure assessment diagram (FAD) procedure based on API 579, as compared to level 2 FAD, since the mechanical properties were known. In both cases, the accuracy improved for shallower cracks. Considering simulated corrosion defects, the RSTRENG approach provided more reliable results on predicting the collapse pressure. For a similar depth and profile, the cracked pipes failed at a lower pressure than those containing simulated corrosion defects of equivalent depth.
Evaluation of crack and simulated corrosion defects in an API X-60 gas pipeline steel
Untersuchung der Schädigungen durch Risse und simulierte Korrosionswirkung in einem Stahl der Festigkeitsklasse API X-60 für Rohre der Erdgasfernleitungen
2010
11 Seiten, 5 Bilder, 4 Tabellen, 10 Quellen
Aufsatz (Konferenz)
Englisch
Susceptibility of welded X80 pipeline steel to corrosion in simulated soil solution
Tema Archiv | 2012
|Study of AC corrosion on coated pipeline steel in simulated soil solution
Tema Archiv | 2011
|Seismic Performance Analysis of Oil Pipeline with Crack Defects
Tema Archiv | 2013
|Effect of corrosion medium composition on rate of crack growth in X70 pipeline steel
Tema Archiv | 2011
|