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2017 | 132 | 4 | 1238-1241
Article title

The Mechanical and Brittle Properties of Gas Pipeline in Service

Content
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Languages of publication
EN
Abstracts
EN
The paper deals with the determination of mechanical and brittle properties of gas pipeline after more than 40 years in operation. The heat affected zone in weld of pipeline is the risk area in terms of embrittlement structure, which resulted in an increase of yield strength and shift of transit temperature to more positive values. The specimens were cut from heat affected zone for this reason. The tensile test according to ISO 6892-1 showed the increase in yield strength: it had a value of 295 MPa at the beginning operation and 400 MPa after more than 40 years in pipeline operation was recorded. The transition temperature at the value of 20°C was determined by using the Charpy impact test according to EN 10045-1. The operators of gas pipelines report that the mean temperature on the outer surface of pipe is about 4°C during the winter. The risk of brittle fragile is very likely if the transition temperature is higher than operating temperature.
Keywords
Publisher

Year
Volume
132
Issue
4
Pages
1238-1241
Physical description
Dates
published
2017-10
received
2016-09-11
(unknown)
2017-07-04
Contributors
author
  • Institute of Materials, Faculty of Metallurgy, Technical University of Košice, 042 00 Košice, Slovakia
author
  • Institute of Materials, Faculty of Metallurgy, Technical University of Košice, 042 00 Košice, Slovakia
author
  • Institute of Materials, Faculty of Metallurgy, Technical University of Košice, 042 00 Košice, Slovakia
  • Institute of Materials, Faculty of Metallurgy, Technical University of Košice, 042 00 Košice, Slovakia
author
  • Institute of Materials, Faculty of Metallurgy, Technical University of Košice, 042 00 Košice, Slovakia
References
  • [1] J. Ferrier, Slovgas 22, 5 (2013)
  • [2] J. Grňo, Corrosion of Underground Structures, Košice, 2003, p. 1
  • [3] J.A. Beavers, G.T. Neil, ASM Handbook, Eds. S.D. Cramer, B.S. Covino, ASM International, Ohio 2006, p. 1015, doi: 10.1361/asmhba0004100
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  • [6] B. Vargas-Arista, A. Albiter, F. García-Vázquez, Ó. Mendoza-Camargo, J.M. Hallen, Rev. Met. 50, e024 (2014), doi: 10.3989/revmetalm.024
  • [7] H. Nykyforchyn, E. Lunarska, O. Tsyrulnyk, K. Nikiforov, G. Gabetta, Mater. Corros. 60, 9 (2009), doi: 10.1002/maco.200805158
  • [8] EN ISO 6892-1:2009 Metallic materials. Tensile testing. Part 1: Method of test at ambient temperature
  • [9] EN 10045-2:1993 Charpy impact test on metallic materials. Part 2: Method for the verification of impact testing machines
  • [10] EN 10045-1:1990 Metallic materials. Charpy impact test. Part 1: Test method
  • [11] Internal information for Slovak Gas Industry - distribution, a.s., (in Slovak)
  • [12] EN ISO 148-1:2009 Metallic materials - Charpy pendulum impact test. Part 1: Test method
  • [13] M. Sohaciu, C. Pradescu, E. Vasile, E. Matei, D. Savastru, A. Berbecaru, Digest J. Nanomater. Biostruct. 8, 1 (2013)
  • [14] A.I. Zaky Farahat, A.M. Bahgat Gemeal, R.N. Elshaer, J. Fail. Anal. Preven. 16, 86 (2016), doi: 10.1007/s11668-015-0051-4
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv132n4p05kz
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