Element has unique Sour Gas Laboratories capable of pressurizing sour gas (hydrogen sulphide) mixtures to 300 bar, with dedicated sour boosting pump, and performing sour gas exposure of elastomers, thermoplastics and composites. Sour rapid gas decompression (RGD) is also offered alongside standard offerings. These tests give insight into the performance of materials and how they degrade in the chemically hostile sour fluids encountered in O&G applications. 

Normal test conditions are room temperature to 230°C and 300 bar with concentration levels of 200ppm to 100% H2S with mixtures of carbon dioxide (CO2), methane (CH4) or any other specified gases.  

High temperature tests are also available up to 300°C. Customer-specific immersion testing up to 700 bar with 200ppm of H2S can be performed.  

Tests can be performed to following standards:


NORSOK M-710 / ISO 23936

Element has over 25 years experience of performing NORSOK / ISO 23936 tests. Hitchin staff have made large contributions to both standards and are members on the ISO standards Working Group committee. 

Tests are performed according to: 
  • ISO 23936-1:  which deals with sour ageing of thermoplastics
  • ISO 23936-2:  which deals with sour ageing of elastomers
  • NORSOK M-710: which deals with sour ageing of both elastomers and thermoplastics


ISO 10423 F.1.13 (API 6A)

Appendix F.1.13 Fixture and Immersion Test to class DD/EE and FF/HH.

Element have over 15 years experience in performing the F.1.13 Fixture Test on various sized test vessels.The high pressure, 1 week sour portion of the fixture test is performed in a dedicated sealed area with a fast extraction system. This ensures that: (i) no personnel are near the vessel; and (ii) any H2S is safely contained and neutralised. Element always puts Health and Safety first.The sub-ambient portion of the fixture test is performed in a large dedicated chiller unit.


Evaluating Elastomeric Materials in Sour Gas Environments as per NACE TM0187.


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