Community Research and Development Information Service - CORDIS


This research programme was designed to study the phenomenon of unstable shear fracture propagation in gas transmission pipelines for thick wall pipes and pipes of grade X80. It was intended to study the validity of the extrapolation of earlier studies on materials up to grade X70 to these pipes. Three full scale tests, proposed by EPRG, were conducted on 36-inch and 48-inch pipes. The test procedure followed the previous practice. The tests were accompanied by detailed laboratory investigations and additional instrumentation of the full scale tests. A comparison of the test results with the existing analyses was made. It appeared that existing predictions based on Charpy-V values which have been established for grades up to X70 did not give toughness levels sufficient for crack arrest in pipes of grade X80 under these test conditions. An initial attempt was made at improving toughness measurements, in order to describe fracture propagation behaviour of pipes by using fracture propagation energies from new development parameter studies.

Additional information

Authors: MANNESMANN, The European Pipeline Research Group, Duisberg (DE)
Bibliographic Reference: EUR 12104 EN (1990) 126 pp., FS, ECU 11.25
Availability: (2)
ISBN: ISBN 92-826-1187-6
Record Number: 199010521 / Last updated on: 1994-12-01
Original language: en
Available languages: en