2020 №05 (05) DOI of Article
2020 №05 (07)

The Paton Welding Journal 2020 #05
TPWJ, 2020, #5, 34-40 pages
Automatic arc welding in manufacture and renovation repair of pipe elements of spirals of high-pressure heaters of NPP power units

L.M. Lobanov1, N.M. Makhlin2, V.Ye. Popov2, D.S. Oliyanenko2, O.V. Kovalyuk3
1E.O. Paton Electric Welding Institute of NAS of Ukraine, 11 Kazymyr Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
2SE «Scientific and engineering center of welding and control in the field of nuclear energy of Ukraine of E.O. Paton Electric Welding Institute of the NAS of Ukraine, 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: electro@paton.kiev.ua
3SE «Atomenergomash» of the SE NNEGC «Energoatom», 52 Promyslova Str., PO Box 306, 71503, Energodar, Ukraine. E-mail: office@aem.zp.ua

The paper considers the possibility for applying automatic orbital welding using nonconsumable electrode in helium or plasma welding using the methods of autopressing or successive penetration to produce welded joints of pipe elements of spirals in high-pressure heaters. The results of testing this technology and the optimal modes of producing position welded joints of pipe elements in spirals of high-pressure heaters of NPP power units are presented. A description of technical proposals on creation of domestic welding equipment for implementation of the proposed technology was presented. It is shown that the use of the developed technology applying domestic equipment can significantly increase the labour efficiency when producing welded joints of pipe elements in spirals of high-pressure heaters and significantly improve their quality. 13 Ref., 3 Figures.
Keywords: high-pressure heaters, spirals of high-pressure heaters, automatic orbital welding, nonconsumable electrode, autopressing or successive penetration, constricted arc, helium arc or plasma welding, position butt joints of pipelines, plasmatron

Received 22.03.2020


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