Bituminous Insulations Durability of Underground Metallic Pipelines I Field investigations

Oprina, Gabriela; Radermacher, Ladislau; Lingvay, Daniel; Marin, Dorian; Voina, Andreea; Mitrea, Sorina

Gabriela Oprina, Ladislau Radermacher, Daniel Lingvay, Dorian Marin, Andreea Voina, Sorina Mitrea

Bituminous Insulations Durability of Underground Metallic Pipelines I Field investigations

Abstract:

The corrosion state of an underground metallic pipeline of Ø161 mm and 565 m length was assessed by specific electrical and electrochemical measurements. The investigated pipe, buried in 1997, was protected against corrosion by successive layers of bituminous material with a total thickness of 1 to 1.2 mm. The pipeline crosses three electrified railway lines (50 Hz - 28 kV), and then its route is approximately parallel to these lines; thus, the induced AC voltages between line and ground were calculated obtaining values between 4.05 and 7.1 Vrms, in good agreement with the values measured in the accessible points. The measurements regarding the insulation capacity against corrosion of the bituminous insulation, performed at one month and after 19 years of burial, showed an increase of the average cathode current density needed for obtaining the protection potential in the range -1.00 ÷ -1.28 VCu/CuSO4 of approx. three times (from 6.65 up to 19.96 mA/m2), in good agreement with the evolution of the insulation resistance measured between the steel pipe (having a contact area with the ground of 270.5 m2) and a ground socket of 4 W, which decreased from 995 to 315 kW. Following the analysis and processing of the field collected data, it is considered that, by implementing a cheap cathodic protection system (without cathodic current power supply), based on the rectification of the AC induced voltage, the safe operation period of the investigated pipeline may be extended by at least 50 years.

Keywords:
metallic pipeline; bituminous insulation; corrosion; AC stray currents; induced AC voltage

Issue: 2017, Volume 68, Issue 3

Pages: 581-585

Publication date: 2017/4/15

https://doi.org/10.37358/RC.17.3.5505

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
OPRINA, G., RADERMACHER, L., LINGVAY, D., MARIN, D., VOINA, A., MITREA, S., Bituminous Insulations Durability of Underground Metallic Pipelines I Field investigations, Rev. Chim., 68(3), 2017, 581-585.

Vancouver
Oprina G, Radermacher L, Lingvay D, Marin D, Voina A, Mitrea S. Bituminous Insulations Durability of Underground Metallic Pipelines I Field investigations. Rev. Chim.[internet]. 2017 Mar;68(3):581-585. Available from: https://doi.org/10.37358/RC.17.3.5505

APA 6th edition
Oprina, G., Radermacher, L., Lingvay, D., Marin, D., Voina, A. & Mitrea, S. (2017). Bituminous Insulations Durability of Underground Metallic Pipelines I Field investigations. Revista de Chimie, 68(3), 581-585. https://doi.org/10.37358/RC.17.3.5505

Harvard
Oprina, G., Radermacher, L., Lingvay, D., Marin, D., Voina, A., Mitrea, S. (2017). 'Bituminous Insulations Durability of Underground Metallic Pipelines I Field investigations', Revista de Chimie, 68(3), pp. 581-585. https://doi.org/10.37358/RC.17.3.5505

IEEE
G. Oprina, L. Radermacher, D. Lingvay, D. Marin, A. Voina, S. Mitrea, "Bituminous Insulations Durability of Underground Metallic Pipelines I Field investigations". Revista de Chimie, vol. 68, no. 3, pp. 581-585, 2017. [online]. https://doi.org/10.37358/RC.17.3.5505

Text
Gabriela Oprina, Ladislau Radermacher, Daniel Lingvay, Dorian Marin, Andreea Voina, Sorina Mitrea,
Bituminous Insulations Durability of Underground Metallic Pipelines I Field investigations,
Revista de Chimie,
Volume 68, Issue 3,
2017,
Pages 581-585,
ISSN 2668-8212,
https://doi.org/10.37358/RC.17.3.5505.
(https://revistadechimie.ro/Articles.asp?ID=5505)
Keywords: metallic pipeline; bituminous insulation; corrosion; AC stray currents; induced AC voltage

RIS
TY - JOUR
T1 - Bituminous Insulations Durability of Underground Metallic Pipelines I Field investigations
A1 - Oprina, Gabriela
A2 - Radermacher, Ladislau
A3 - Lingvay, Daniel
A4 - Marin, Dorian
A5 - Voina, Andreea
A6 - Mitrea, Sorina
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2017
VL - 68
IS - 3
SP - 581
EP - 585
UR - https://doi.org/10.37358/RC.17.3.5505
KW - metallic pipeline
KW - bituminous insulation
KW - corrosion
KW - AC stray currents
KW - induced AC voltage
ER -

BibTex
@article{RevCh2017P581,
author = {Oprina Gabriela and Radermacher Ladislau and Lingvay Daniel and Marin Dorian and Voina Andreea and Mitrea Sorina},
title = {Bituminous Insulations Durability of Underground Metallic Pipelines I Field investigations},
journal = {Revista de Chimie},
volume = {68},
number = {3},
pages = {581-585},
year = {2017},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.17.3.5505},
url = {https://revistadechimie.ro/Articles.asp?ID=5505}
}

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