Welding fabrication defects in two offshore steel jacket structures
- EQE International Limited, Warrington (United Kingdom)
- Health and Safety Executive, London (United Kingdom). Offshore Safety Div.
- AEA Technology, Culham (United Kingdom). Marine Technology Support Unit
The results of a survey of welding fabrication defects in two North Sea jacket structures fabricated in the mid 1980`s and the early 1990`s are presented in this paper. The results were used to assess the general defectiveness of the two structures. Information was collected from the initial fabrication inspections and the post-repair inspections. The defects were classified as reportable defects, which remain unrepaired, and repairable defects, which are repaired and re-inspected. The data showed that the defects were exclusively embedded defects or root defects which were detected by ultrasonic and radiographic methods respectively. No surface breaking defects were reported from the magnetic particle inspections. The data were used to determine incidence rates, expressed in terms of the length of defective weld, distributions of defect sizes and the number of defective welds. The results can be used in the consideration of fabrication inspection capability and construction standards, as well as to obtain a measure of the level of reportable defects which remain un-repaired in a steel jacket.
- OSTI ID:
- 403617
- Report Number(s):
- CONF-9606279-; ISBN 0-7918-1492-0; TRN: IM9651%%652
- Resource Relation:
- Conference: 14. international conference on offshore mechanics arctic engineering (OMAE), Florence (Italy), 16-20 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of OMAE 1996 -- Proceedings of the 15. international conference on offshore mechanics and arctic engineering. Volume 3: Materials engineering; Salama, M.M. [ed.] [Conoco Inc., Ponca City, OK (United States)]; Toyoda, Masao [ed.] [Osaka Univ. (Japan)]; Liu, S. [ed.] [Colorado School of Mines, Golden, CO (United States)]; Santos, J.F. dos [ed.] [GKSS, Geesthacht (Germany)]; Stacey, A. [ed.] [Health and Safety Executive, London (United Kingdom)]; Tubby, P.; Pisarski, H. [eds.] [TWI, Cambridge (United Kingdom)]; PB: 579 p.
- Country of Publication:
- United States
- Language:
- English
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