A 40-km long, 12-in, (30-cm) diameter pipeline was recently manufactured from electric resistance welded (ERW) line pipe. Unfortunately, certain longitudinal welds revealed leaks during the hydrotest. This problem is probably not caused by an original manufacturing defect, but rather by subsequent corrosion damage related to the extreme sensitivity of the weld zone to hydrogen. This apparently unprecedented failure was the result of an unsuspected incompatibility between the thermomechanical treatment inherent to the ERW process and the chemical composition of the skelp used, which in fact was otherwise of excellent quality.
Reliability of ERW line pipes: A case history
Materials Performance ; 38 , 2 ; 63-68
1999
6 Seiten, 19 Quellen
Aufsatz (Zeitschrift)
Englisch
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