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Estimate of the allowable dimensions of diagnosed defects in category III and IV welded pipeline joints1

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Power Technology and Engineering Aims and scope

An approach for estimating the permissible dimensions of technological defects in butt welded joints in category III and IV pipelines is described. The allowable size of a welding defect is determined from the condition of compliance with the specifications on strength for a reference cross section (damaged joint) of the pipeline taking into account its weakening by a given defect.With regard to the fairly widespread discovery of technological defects in butt welded joints during diagnostics of auxiliary pipelines for thermal electric power plants, the proposed approach can be used in practice by repair and consulting organizations.

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References

  1. PB 1057303. Rules for Construction and Safe Operation of Steam and Hot Water Pipelines [in Russian], Izd. NTTs “Promyshlennaya bezopasnost’,” Moscow (2004).

  2. SO 15334.17.4642003. Instructions for Extending the Service Lifetime of Category II, III, and IV Pipelines (approved by Order No. 275 of the Ministry of Energy of Russia of June 30, 2003 ) [in Russian], Izd. JSC “VTI,” Moscow (2003).

  3. RD 1024998. Standards for Durable Design of Fixed Boilers and Steam and Hot Water Pipelines [in Russian], Izd. NTTs “Promyshlennaya bezopasnost’,” Moscow (2003).

  4. STO 17230282.27.100.005–2008. Basic Components of Boilers, Turbines, and Pipelines at Thermal Power Plants. Monitoring the State of Metals. Standards and Specifications [in Russian], Izd. JSC RAO “EÉS Rossii,” Moscow (2008).

  5. PNAÉ G-7-002–86. Standards for Durable Design of Equipment and Pipelines at Nuclear Power Plants [in Russian], Énergoatomizdat, Moscow (1989).

  6. M-02–91. Method for Determining Allowable Defects in the Metal of Equipment and Pipelines During Operation of Nuclear Power Plants [in Russian], Énergoatomizdat, Moscow (1991).

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Authors and Affiliations

  1. JSC “All-Russia Thermal Engineering Institute” (JSC “VTI”), Moscow, Russia

    E. A. Grin’ & V. I. Bochkarev

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  1. E. A. Grin’
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  2. V. I. Bochkarev
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Additional information

1This work was supported by the Ministry of Education and Science of the Russian Federation (contract No. 16.552.11.7015).

Translated from Élektricheskie Stantsii, No. 8 2012, August, pp. 35 – 39.

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Grin’, E.A., Bochkarev, V.I. Estimate of the allowable dimensions of diagnosed defects in category III and IV welded pipeline joints1 . Power Technol Eng 46, 394–398 (2013). https://doi.org/10.1007/s10749-013-0367-8

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  • DOI: https://doi.org/10.1007/s10749-013-0367-8

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