Fatigue assessment of an electrical resistance welded oil pipeline

Authors
Otegui, Luis Jose; Chapetti, Mirco Daniel; Motylicki, J.
Publication Year
2002
Language
English
Format
article
Status
Published version
Description
A blowout in a 14 in. diameter, 1/4 in. thick API 5L X46 oil pipeline was due to the sudden propagation of a fracture at the longitudinal Electrical Resistance Welding (ERW) weld. The cracks initiated from small hook crack-type defects on the external surface of the tube, in the highly deformed and hardened central area of the ERW weld. Fatigue tests were carried out to characterize initiation and propagation of fatigue cracks in base and weld metals, in two regions of the pipeline. Specimens were subjected to cyclic stresses similar to those that were produced during the passage of the scraper. The fatigue growth was modeled by integrating experimental results. Predicted fatigue lives of about 20,000 cycles justify fatigue propagation up to failure in weld metal, from initial 2 mm deep defects introduced during manufacturing.
Fil: Otegui, Luis Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Chapetti, Mirco Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Fil: Motylicki, J.. Oldelval S.a.; Argentina
Subject
ELECTRICAL RESISTANCE WELDING (ERW)
FATIGUE ASSESSMENT
OIL PIPELINE
Fisiología
Medicina Básica
CIENCIAS MÉDICAS Y DE LA SALUD
Access level
Restricted access
License
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/37805