0 votes

Can Fiber Reinforced Plastic (FRP) be used in the sour service?

asked Jan 25, 2015 in Material by esjensen (2,720 points)
Can I specify the use of Fiber Reinforced Plastic (FRP) in the sour service (H2S)?

3 Answers

+1 vote
answered Jan 26, 2015 by wangroc (3,280 points) | selected Jan 26, 2015 by Normandy
Best answer

The seal can be selected using the following guidelines:

  Elast-O-Lion 101 (HNBR) Elast-O-Lion 985 (HNBR) Aflas (FEPM) Kalrez (FFKM) PTFE
Temperature -29 to 150 °C -55 to 150 °C 5 to 200 °C 5 to 325 °C -100 to 200 °C
H2S Content Approx. 1,000 ppm Approx. 1,000 ppm High resistance
(< 5%)
High resistance
(> 5%)
High resistance
(> 5%)
Rapid Gas Decompression Resistant Yes Yes Yes Yes Different type of seal configuration is required compared to elastomers when used as a seal.


+1 vote
answered Jan 25, 2015 by wangroc (3,280 points)
No. Fiber reinforced plastic (FRP) should not be used in the sour environment.
commented Jan 25, 2015 by esjensen (2,720 points)
Thanks for your answer.

Based on what you said, can you give a guideline on selecting the SEALS for Elastomers and Thermoplastics material for use in the sour service?
0 votes
answered Jan 26, 2015 by Normandy (21,040 points)

I'd like to add that Cadmium and Galvanized Plating should never be used in sour service.

Fusion bonded cladding and overlaying with CRA material should be considered as an effective barrier against H2S environment provided the CRA material is suitable for the specific process conditions.