Skip to main content
SpringerLink
Log in

Changes in Pipe Geometry in the Course of Sequential Creation of Stresses on the Inner Surface under External Thermomechanical Impacts

  • Published:
Steel in Translation Aims and scope

Abstract

In modern high-technology industry, pipe bending technology is widely used. Pipe bends are an integral part of pipeline systems. The most widely used methods are techniques of cold pipe bending accompanied by a number of negative phenomena such as reduction in the wall thickness on the outer side of the bend, ovalization of the cross section, and formation of crimps. The article presents a study of the influence of deforming pipe billets by rolling under high tension on the structure and properties of the billet’s material. The pipe deformation by rolling under tension allows obtaining radially bent billets without destroying them and without causing obvious defects on the surface and microstructure. The tests were conducted using samples manufactured of 3sp (ASTM 284 grade D) and 12Cr18Ni10Ti (UNS S32100) grade steels. The microstructure was examined in accordance with GOST 5639–82 state standard, the mechanical properties were investigated in accordance with GOST 1397–84, and the microhardness—in accordance with GOST 9450–76. The effect of geometry changes of the pipe billets on their structure and properties was studied. It is shown that the pipe deformation by rolling leads to changes in the mechanical properties of the tested materials. The microhardness and strength values increase, while the grain points decrease. In the course of deformation, the microstructure of the material may change as a result of structural transformations (quenching). The plastic flow of the metal during the thermomechanical deformation suggests possible change in the pipe wall structure as a result of recrystallization and heat treatment of the material in the bend area, which requires further study and in-depth analysis of the technology in question.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1.
Fig. 2.
Fig. 3.

Similar content being viewed by others

REFERENCES

  1. Tavastsherna, R.I., Izgotovlenie i montazh tekhnologicheskikh truboprovodov (Production and Installation of Technological Pipelines), Moscow: Stroiizdat, 2012.

  2. Mandal, A., Syed, B., Bhandari, K., Bhattacharya, B., et al., Cold-bending of linepipe steel plate to pipe, detrimental or beneficial? Mater. Sci. Eng., A, 2019, vol. 746, no. 2, pp. 58–72.

    Article  CAS  Google Scholar 

  3. Li, J., Zhou, C., Cui, P., and He, X., Plastic limit loads for pipe bends under combined bending and torsion moment, Int. J. Mech. Sci., 2015, vol. 92, no. 3, pp. 133–145.

    Article  Google Scholar 

  4. Iwamoto, T. and Kanie, S., Evaluation of bending behavior of flexible pipe using digital image processing, Procedia Eng., 2017, vol. 171, no. 12, pp. 1272–1278.

    Article  Google Scholar 

  5. Gal’perin, A.I., Mashiny i oborudovanie dlya gibki trub (Machines and Equipment for Pipe Bending), Moscow: Nedra, 1983.

  6. Yuan, L. and Kyriakides, S., Plastic bifurcation buckling of lined pipe under bending, Eur. J. Mech., 2014, vol. 47, no. 9, pp. 288–297.

    Article  Google Scholar 

  7. Sasidharan, S., Arunachalam, V., and Subramaniam, S., Ramifications of structural deformations on collapse loads of critically cracked pipe bends under in-plane bending and internal pressure, Nucl. Eng. Technol., 2017, vol. 49, pp. 254–266.

    Article  CAS  Google Scholar 

  8. Shim, D., Kim, K., and Lee, K., Double-stage forming using critical pre-bending radius in roll bending of pipe with rectangular cross-section, J. Mater. Process. Technol., 2016, vol. 236, pp. 189–203.

    Article  Google Scholar 

  9. Kiyamov, A.I., USSR Inventor’s Certificate no. 566649, Otkrytiya. Izobret., 1977, no. 28.

  10. Bae, W., Chang, K., and Lee, C., Progressive inelastic deformation of a girth-welded stainless steel pipe under internal pressure and cyclic bending, Ocean Eng., 2016, vol. 128, no. 12, pp. 81–93.

    Article  Google Scholar 

  11. Krikun, V.Ya., Trubogibochnye raboty na stroitel’stve truboprovodov (Pipe Bending Works at Pipeline Building), Moscow: Nedra, 1978.

  12. Kim, Y., Lee, K., Oh, C., et al., Effect of bend angle on plastic loads of pipe bends under internal pressure and in-plane bending, Int. J. Mech. Sci., 2007, vol. 49, no. 12, pp. 1413–1424.

    Article  Google Scholar 

  13. Bubnov, V.A. and Ovchinnikov, V.A., USSR Inventor’s Certificate no. 427759, Otkrytiya. Izobret., 1974, no. 18.

  14. Hayashi, A., Terada, Y., and Kanie, S., Development of pipe-in-pipe filled with granular material for flexible and ductile bending performance, Procedia Eng., 2014, vol. 95, pp. 232–240.

    Article  Google Scholar 

  15. Efimov, O.Yu., Chinokalov, V.Ya., Yur’ev, A.B., et al., Structure-phase states and mechanical properties formation regularities at accelerated cooling of parallel flange beam, Izv. Vyssh. Uchebn. Zaved., Chern. Metall., 2011, no. 4, pp. 16–19.

  16. Kosterev, V.B., Efimov, O.Yu., Ivanov, Yu.F., et al., Formation of gradient structure-phase states in thermomechanical hardening, Steel Transl., 2011, vol. 41, no. 4, pp. 283–286.

    Article  Google Scholar 

  17. Uzlov, I.G., Sidorenko, O.G., Fedorova, I.P., et al., New tendencies in control technology of thermal hardening of reinforcing bars, Metall. Gornorudn. Prom-st’, 2008, no. 1, pp. 89–91.

  18. Sarychev, V.D., Gromov, V.E., Nevskii, S.A., et al., Nanolayer formation during hydrodynamic instability under external stimuli, Steel Transl., 2016, vol. 46, no. 10, pp. 679–685.

    Article  Google Scholar 

  19. Tang, N., Plastic-deformation analysis in tube bending, Int. J. Pressure Vessels Piping, 2000, vol. 77, no. 9, pp. 751–759.

    Article  Google Scholar 

  20. Li, H. and Mackenzie, D., Characterizing plastic collapse of pipe bend structures, Int. J. Pressure Vessels Piping, 2006, vol. 83, pp. 85–95.

    Article  Google Scholar 

  21. Gavriilidis, I. and Karamanos, S., Bending and buckling of internally-pressurized steel lined pipes, Ocean Eng., 2019, vol. 171, no. 1, pp. 540–553.

    Article  Google Scholar 

  22. Lakirev, S.G. and Khil’kevich, Ya.M., RF Patent 818707, Bull. Izobret., 1981, no. 13.

  23. Lakirev, S.G., Khil’kevich, Ya.M., Kozlov, A.V., and Bobylev, A.V., Effect of effort reduction at bending of pipes rolled with high tension and mechanism of its manifestation, in Progressivnaya tekhnologiya chistovoi i otdelochnoi obrabotki (Advanced Technology of Emerizing and Finishing Treatment), Chelyabinsk: Chelyab. Gos. Tekh. Univ., 1995.

  24. Kozlov, A.V. and Bobylev, A.V., Tekhnologiya i oborudovanie kholodnoi gibki tonkostennykh trub: monografiya (Technology and Equipment of Cold Bending of Thin-Walled Pipes: Monograph), Chelyabinsk: Yuzhn. Ural. Gos. Univ., 2007.

Download references

Funding

This work was supported by the Ministry of Education and Science of the Russian Federation, project no. 11.9658.2017/8.9.

Author information

Authors and Affiliations

  1. South Ural State University, Zlatoust Branch, 456217, Zlatoust, Chelyabinsk oblast, Russia

    I. V. Chumanov, A. V. Kozlov & M. A. Matveeva

Authors
  1. I. V. Chumanov
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. V. Kozlov
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. M. A. Matveeva
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding authors

Correspondence to I. V. Chumanov, A. V. Kozlov or M. A. Matveeva.

Additional information

Translated by O. Lotova

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Chumanov, I.V., Kozlov, A.V. & Matveeva, M.A. Changes in Pipe Geometry in the Course of Sequential Creation of Stresses on the Inner Surface under External Thermomechanical Impacts. Steel Transl. 49, 683–687 (2019). https://doi.org/10.3103/S0967091219100061

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.3103/S0967091219100061

Keywords:

Search

Navigation