NORSOK Approved Compounds

NORSOK Approved compounds certified to Industry standards

NORSOK M-710 approved compounds

NORSOK standards are internationally recognised testing methodologies developed by the Norwegian Petroleum industry. The M-710 standard defines requirements for critical polymeric seals, seats, and back-up materials for permanent subsea use. The standard also applies to topside valves in critical gas systems.

Eastern Seals (UK) Ltd supply wide range of NORSOK approved materials. They are suitable for a variety of critical services and applications, enabling our customers to select the appropriate compounds to suit their specific needs. Our products have been qualified against the strict NORSOK M-710 rapid gas decompression (RGD) and the effects of sour gas (H2S) aging on polymer materials.

Eastern Seals provide a range of formulations within the HNBR, Viton B, Viton GLT and FFKM materials that have passed the M-710 requirements. These are listed in the table below.

Please contact us to order NORSOK-approved O-Rings, or to find out more information. You can also download our Approved compounds Information Sheet:


Temp Range
V90 AED GLTViton 90 Anti-Explosive Decompression, GLT TypeBLACK-30°C to +250°C (Static)
-40°C to +220°C (Dynamic)
90NORSOK M-710 Approved
V90 AED Type BViton 90 Anti-Explosive Decompression, B TypeBLACK-30°C to +250°C (Static)
-15°C to +220°C (Dynamic)
90NORSOK M-710 Approved. Provides low and stable compression set at high temperature.
HNBR90 AEDHydrogenated Nitrile 90 Anti Explosive DecompressionBLACK-30°C to 150°C90NORSOK M-710 Approved
FKM90 LT60 AEDFKM 90 Anti-Explosive Decompression, Ultra Low TemperatureBLACK-60°C to +225°C (+250°C for short periods)90This compound is suitable for Ultra-low temperature applications. It has good permeability to hydrocarbons (ethane – propane). Norsok M-710 Approved (Rev.2 October 2001). NACE TM0187 Tested – Sour Fluid test.
FKM90 LT50 AEDFKM 90 Anti-Explosive Decompression, Low Temperature gradeBLACK-50°C to +225°C (+250°C for short periods)90Norsok M-710 Approved (Rev.2 October 2001).
FFKM8717Perluoroelastomer 90 Anti-Explosive DecompressionBLACK-10°C to + 230°C continuous (260°C Peak)90NACE TM0187 Tested – Sour Fluid test
FFKM8732Perluoroelastomer 90 Anti-Explosive Decompression, Low TemperatureBLACK-45°C to + 250°C continuous90High chemical resistance and low temperature capability. Developed for the Oil & gas Industry. Explosive decompression resistant, tested to Norsok M-710.
HNBR90 AED LTHydrogenated Nitrile 90 Anti Explosive Decompression, Low TemperatureBLACK-55°C to 160°C90This peroxide cured compound has 19% ACN content, with carbon black reinforcement. It provides low temperature capability and rapid gas decompression (RGD) resistance. NACE TM0187 Tested – Sour Fluid test

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