Email this article WELDING OF PIPES WITH SILICATE ENAMEL COATING
- Authors: Kovtunov A.I.1, Alekseev N.S.1, Plakhotny D.I.1, Tanasov O.V.1
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Affiliations:
- Togliatti State University, Togliatti
- Issue: No 3-1 (2015)
- Pages: 60-67
- Section: Technical Sciences
- URL: https://vektornaukitech.ru/jour/article/view/364
- DOI: https://doi.org/10.18323/2073-5073-2015-3-60-67
- ID: 364
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Abstract
Pipes with silicate enamel coating are widely used in heat-and-power engineering, chemical and petrochemical manufacturing engineering, oil production and transportation. Pipes with internal silicate enamel coating are recommended by documentary standard for construction of fire-fighting systems for tanks for oil and oil products.
Serviceability of pipelines is determined by corrosion resistance of inside surface of welded joint. While welding pipelines with silicate enamel coating, as a result of high-temperature action, the enamel burning and vaporization, pore formation, bubbling, and macro- and micro crack formation take place in the heat-affected area.
To reduce thermal action on the silicate enamel coating the authors offered to substitute steel weld base with the non-ferrous metal alloys having lower melting point. Zinc, copper and copper-based alloys, nickel and nickel-based alloys were selected to be such metals with allowance for melting point.
Tests of welding joints mechanical properties showed the applicability of copper and nickel alloys as the electrode material for machine welding of pipes with internal silicate enamel coating. When applying these materials the mechanical properties of welding joints have the same level as the properties ensured by welding with Sv-08G2S steel electrode wire.
Surface and chemical analysis of silicate enamel coating proved the effective application of CuSi3 electrode wire. Machine welding using CuSi3 electrode wire provided minimum damage and changes in chemical composition of silicate enamel coating.
About the authors
Aleksandr Ivanovich Kovtunov
Togliatti State University, Togliatti
Author for correspondence.
Email: akovtunov@rambler.ru
Doctor of Sciences (Engineering), Professor of Chair “Welding, pressure materials treatment and related processes”
РоссияNikolay Sergeevich Alekseev
Togliatti State University, Togliatti
Email: nik.al090@yandex.ru
graduate student of Chair “Welding, pressure materials treatment and related processes”
РоссияDenis Ivanovich Plakhotny
Togliatti State University, Togliatti
Email: d01125@mail.ru
postgraduate student of Chair “Welding, pressure materials treatment and related processes”
РоссияOleg Viktorovich Tanasov
Togliatti State University, Togliatti
Email: fake@neicon.ru
graduate student of Chair “Welding, pressure materials treatment and related processes”
РоссияReferences
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