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Sour Gas Resistant Materials

PPE Material
Grade
Material TypeDescriptionNORSOK M710
2% H2S
NORSOK M710
25% H2S
NACE
TM0187
ISO 10423
(API 6A)
EnDura® A90HFEPMAflas based copolymerFail*†Tested†Not TestedFail*†
EnDura® G92EFFKMRGD & chemical resistant gradePassTested †Not TestedPass
EnDura® V91AFKMUltra-low temperaturePassTested†PassPass
EnDura® V91KFKMLow temperature gradePassTested†PassPass
EnDura® Z95XHNBRGeneral purpose gradePassNot TestedPassPass

*Failure is caused by reaction to aromatic hydrocarbons rather than H2S.
Contact PPE for further details.

 NORSOK M710
2% H2S
NORSOK M710
25% H2S
NACE TM0187ISO 10423
(API 6A)
Test vessel composition:
Gas phase
Oil phase
Water phase

30%
60%
10% 
 
30%
60%
10%
  
90%
5%
5%

35%
60%
5% 
Gas phase composition:
Volume (%)
 2% H2S
3% CO2
95% CH4
 25% H2S
3% CO2
72% CH4
 FKM
20% H2S
5% CO2
75%CH4
HNBR
5% H2S
20% CO2
75% CH4 
 10% H2S
80% CO2
10% CH4
Oil phase composition:
Volume (%)
 10% toluene
20% cyclohexane
70% heptane 
 10% toluene
20% cyclohexane
70% heptane 
 25% hexane
20% octane
50% decane
5% toluene
100% kerosene 
Water phase composition:
Volume (%)
100%
distilled water 
100%
distilled water 
  100% ASTM S1193
Type IV
100%
deionised water 
Test specimen location Oil phaseOil phase Gas phase  Oil phase 
TemperatureVarious
from 100 to 200°C 
 Various
from 150 to 175°C 
  150°C  FKM
100°C  HNBR
177°C 
Test duration8 weeks  8 weeks160 hours  160 hours 

 

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