The Paton Welding Journal, 2008, №06

2008 №06 (01)

2008 №06 (03)

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The Paton Welding Journal, 2008, #6, 8-13 pages

Selection of technologies for repair of defects in active main pipelines

V.I. Makhnenko, E.A. Velikoivanenko, O.I. Olejnik

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Repair technologies for removal of defects in main pipelines require substantiation for characteristic typical cases of fitness for service. For this, corresponding calculation algorithms are developed to determine the risk of failure of a repaired defect depending upon its size, repair method and operational conditions. The study describes the developed approach by an example of selection of the technology for repair of cracks
Keywords: main pipelines, safe operation, technical diag¬nostics, detected defects, selection of repair technology, leak¬proof sleeve, band, calculation algorithms, Monte-Carlo method, failure probability, fitness for service

References

1. But, V.S., Vasilyuk, V.M., Fedorenko, Yu.T. et al. (2006) Trends in development of repair technologies for main pipelines under service conditions. In: Proc, of Sci. Seminar on Serviceability of Pipeline Transportation Systems (Kiev, 11 April, 2006), 31–38.
2. But, V.S., Gretsky, Yu.Ya., Rozgonyuk, V.V. et al. (2001) Substantiation of a new approach for performing welding operations on pipelines under pressure. Naft. i Gazova Promyslovist, 4, 33–39.
3. But, V.S., Olijnyk, O.I. (2006) Strategy of development of repair technologies for active main pipelines. In: Problems of life and operational safety of structures, constructions ana machines. Ed. B.E. Paton. Kiev: PWI.
4. API Standard 1104: Welding of pipelines and related facilities. Appendix II: Welding. Publ. Sept. 1999.
5. Makhnenko, V.I., But, V.S., Velikoivanenko, E.A. et al. (2003) Estimation of permissible sizes of welds for mounting T-joints and sleeves on active main pipelines. The Paton Welding J., 8, 6–11.
6. Makhnenko, V.I., But, V.S., Velikoivanenko, E.A. et al. (2001) Mathematical modelling of pitting defects in active oil and gas pipelines and development of a numerical method for estimation of permissible parameters of arc weld¬ing repair of defects. Ibid., 11, 2–9.
7. (2000) Fitness-for-service. American Petroleum Institute Recommended Practice 579.
8. Makhnenko, V.I. (2006) Safe service life of welded joints and assembly units on modern structures. Kiev: Naukova Dumka.
9. Makhnenko, V.I., Velikoivanenko, E.A., Olejnik, O.I. (2008) Risk analysis as a formalization mean for decision¬making related to unscheduled repair of welded structures. The Paton Welding J., 5, 5–10.
10. (1989) PNAE G 7 002-86: Norms of strength design of equipment and pipelines for nuclear power plants. Moscow: Energiya.

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Suggested Citation

V.I. Makhnenko, E.A. Velikoivanenko, O.I. Olejnik (2008) Selection of technologies for repair of defects in active main pipelines. The Paton Welding J., 06, 8-13.

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