Norsok Approved Compounds

Norsok approved compounds certified to industry standards

NORSOK‑Approved Compounds — High‑Integrity Sealing Solutions for Critical Environments

Why NORSOK Approval Matters

The NORSOK M-710 specification was developed by the Norwegian petroleum industry to define rigorous qualification criteria for non‑metallic sealing materials — particularly those used in demanding subsea, offshore and high‑pressure gas environments.

Compliance with NORSOK M‑710 means a compound has passed stringent tests for

• Rapid Gas Decompression (RGD) / Explosive Decompression (ED) — ensuring the seal resists blistering, cracking or failure when pressure drops rapidly.
• Sour‑gas (H₂S) ageing — guaranteeing long-term resilience against aggressive, chemically corrosive environments common in oil and gas applications.

For sectors like oil & gas, marine, subsea systems or critical gas infrastructure, these validations are essential for safety, performance and long-term reliability.

What We Offer at Eastern Seals (UK) Ltd

We provide a broad portfolio of NORSOK-approved elastomer compounds — including O‑rings and bespoke seal components — across multiple high‑performance material types. Our compounds have been independently tested and certified under NORSOK M‑710.

Our available material families include:

These compounds are suitable for manufacturing O‑rings, back‑up rings, custom mouldings or other polymeric sealing components tailored to specific operational requirements.

Key Features & Benefits

Choosing NORSOK‑approved compounds delivers a number of advantages:

• Reliable resistance to rapid decompression (RGD/ED) — ensuring structural integrity under sudden pressure drop.
• Chemical and sour-gas (H₂S) compatibility — ideal for oil, gas, chemical processing, and other aggressive media.
• Wide temperature capability — from sub-zero cold environments to high-temperature applications, depending on compound grade.
• Durable mechanical properties — including high tensile strength, low compression set, good flexibility and long service life.
• Flexibility in design and application — suitable for O‑rings, custom mouldings, back‑up rings or bespoke seal components.

How to Choose the Right Compound

Selecting the right sealing material depends on several factors. When specifying a seal, consider:

• Operating pressure and risk of rapid decompression / depressurisation — for high-pressure gas, RGD-resistant AED/EDR compounds are strongly recommended.
• Fluid media — If dealing with sour gas (H₂S), hydrocarbons, aggressive chemicals or saltwater, choose compounds with proven chemical compatibility.
• Temperature range — For cryogenic or sub-zero environments, low-temperature FKM or HNBR grades; for high-temperature or hot-fluid applications, FFKM or high-grade FKM.
• Dynamic vs Static application — For moving parts or dynamic seals, ensure compound properties cover the expected dynamic temperature and pressure range.
• Regulatory or industry compliance requirements — If operating under offshore, subsea or oil/gas industry regulations, NORSOK M‑710 approval ensures compliance and reliability.

If you’re unsure which compound is best for your application — or need a custom seal — our technical team is always on hand to advise.

Contact Us or Request a Callback

If you’d like to order NORSOK‑approved O‑rings or sealing solutions — or require more detailed technical information, please get in touch. Our experts can help you match the right compound to your application, optimise seal life, and ensure compliance with industry standards.

Why This Matters to Our Customers

With increasingly demanding environments in oil & gas, subsea and industrial applications, where pressure fluctuations, sour gas exposure and harsh chemicals are the norm, using properly tested and certified sealing materials isn’t a luxury, it’s essential. By supplying NORSOK‑approved compounds, Eastern Seals gives customers confidence in long-term performance, safety, and regulatory compliance, reducing maintenance frequency, avoiding failures, and saving costs over the life of the installation.

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

This Material Data Sheet section is to be used as a professional guide only. Eastern Seals (UK) Ltd may source their products from a variety of Quality Approved Suppliers and the data shown should not be relied upon by any purchaser without verification of material source.

Information Sheet:

Downloads

Norsok Approved Compounds

ES REF	Description	Colour	Temp Range	Shore	Notes	Datasheet
V90 AED GLT	Viton 90 Anti-Explosive Decompression, GLT Type	BLACK	-30°C to +250°C (Static) -40°C to +220°C (Dynamic)	90	NORSOK M-710 Approved	V90 AED GLT
V90 AED Type B	Viton 90 Anti-Explosive Decompression, B Type	BLACK	-30°C to +250°C (Static) -15°C to +220°C (Dynamic)	90	NORSOK M-710 Approved. Provides low and stable compression set at high temperature.	V90 AED Type B
HNBR90 AED	Hydrogenated Nitrile 90 Anti Explosive Decompression	BLACK	-30°C to 150°C	90	NORSOK M-710 Approved	HNBR90 AED
FKM90 LT50 AED	FKM 90 Anti-Explosive Decompression, Low Temperature grade	BLACK	-50°C to +225°C (+250°C for short periods)	90	Norsok M-710 Approved (Rev.2 October 2001).	FKM90 LT50 AED
FFKM3208	Perluoroelastomer 90 Anti-Explosive Decompression	BLACK	-10°C to + 230°C continuous (260°C Peak)	90	NORSOK M-710 Approved	FFKM 3208
HNBR90 AED LT	Hydrogenated Nitrile 90 Anti Explosive Decompression, Low Temperature	BLACK	-40°C to +150°C (static) -35°C to +150°C (dynamic)	90	This 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	HNBR90 LT AED