Failure Analysis of the Fluorine Rubber Sealing Ring Used in Acidic Gas Fields

G. Q. Qi, D. T. Qi, H. X. Yan, B. Wei, H. B. li, N. Ding, X. D. Shao, D. N. Zhang, X. H. Cai

2018

Abstract

The failure of fluorine rubber sealing ring occurs when it is used in the sulfur condition after one year. By visual observation, there are some cracks and the color changed to black from brown near the location of the contact delivery medium. In order to identify the cause of the failure, the physical properties, structure and composition were tested and compared with the same batch of the rings but without using.The results showed that the hardness and density of the material were increased because of gas permeation. It is evidenced by the microstructural observation, which shows that there are holes in the material near the transport medium. The specimens were characterized by FT-IR and XPS, respectively. The results show that the three-dimensional network structure of the ring is destroyed and the peak strength of -CF2 and -CF is weakened while the CH3, -CH2 and –C=O increase by the action of external stress and gas permeation. As a result of comprehensive evaluation, the reason of sealing ring failure is fatigue aging during the long-termservice life. The gas permeation leads to the destruction of the network structure, and accelerating the aging process.

Paper Citation

in Harvard Style

Qi G., Qi D., Yan H., Wei B., li H., Ding N., Shao X., Zhang D. and Cai X. (2018). Failure Analysis of the Fluorine Rubber Sealing Ring Used in Acidic Gas Fields.In Proceedings of the International Workshop on Materials, Chemistry and Engineering - Volume 1: IWMCE, ISBN 978-989-758-346-9, pages 651-657. DOI: 10.5220/0007442906510657

in Bibtex Style

@conference{iwmce18,
author={G. Q. Qi and D. T. Qi and H. X. Yan and B. Wei and H. B. li and N. Ding and X. D. Shao and D. N. Zhang and X. H. Cai},
title={Failure Analysis of the Fluorine Rubber Sealing Ring Used in Acidic Gas Fields},
booktitle={Proceedings of the International Workshop on Materials, Chemistry and Engineering - Volume 1: IWMCE,},
year={2018},
pages={651-657},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007442906510657},
isbn={978-989-758-346-9},
}

in EndNote Style

TY - CONF

JO - Proceedings of the International Workshop on Materials, Chemistry and Engineering - Volume 1: IWMCE,
TI - Failure Analysis of the Fluorine Rubber Sealing Ring Used in Acidic Gas Fields
SN - 978-989-758-346-9
AU - Qi G.
AU - Qi D.
AU - Yan H.
AU - Wei B.
AU - li H.
AU - Ding N.
AU - Shao X.
AU - Zhang D.
AU - Cai X.
PY - 2018
SP - 651
EP - 657
DO - 10.5220/0007442906510657