HT Armaflex High‑Temperature Pipe Insulation
HT Armaflex is a flexible EPDM insulation material designed for continuous service temperatures up to 150°C. It provides long‑term thermal stability, UV resistance and excellent moisture control for demanding industrial, commercial and renewable energy applications.
HT Armaflex Pipe Insulation VIEW ALL
13mm Wall HT Armaflex13mm Wall HT Armaflex High‑Temperature EPDM Pipe Insulation
19mm Wall HT Armaflex19mm Wall HT Armaflex High‑Temperature EPDM Pipe Insulation
25mm Wall HT Armaflex25mm Wall HT Armaflex High‑Temperature EPDM Pipe Insulation
HT Armaflex AccessoriesAccessories for use with HT Armaflex High‑Temperature Insulation
HT/ArmaFlex is a highly flexible, closed-cell insulation material suitable for High Temperatures up to 150°C
For a full range of pipe insulation lagging we have available,
see our Pipe Lagging & Pipe Insulation category.
HT Armaflex Benefits
Performance Benefits
- High‑temperature EPDM formulation designed for continuous service up to 150°C, making it suitable for solar thermal, steam, hot gas and industrial process lines.
- Closed‑cell elastomeric structure provides excellent water vapour diffusion resistance (μ ≥ 4000 for tubes), helping prevent moisture ingress and long‑term thermal degradation.
- Low thermal conductivity (as low as 0.042 W/m·K at 0°C for tubes) helps minimise heat loss and maintain system efficiency across high‑temperature pipework.
- Inherent UV resistance allows HT Armaflex to be installed outdoors without additional jacketing in most environments, reducing installation time and lifecycle cost.
- Self‑extinguishing behaviour with no flaming droplets and stable fire performance characteristics, supporting safe use in commercial and industrial settings.
- Long‑term material stability, even under elevated temperatures, with no fibre shedding, no dust and no risk of corrosion under insulation (CUI).
Practical Benefits
- Flexible EPDM construction makes HT Armaflex easy to install around bends, valves and complex pipework, even in tight plantrooms or retrofit environments.
- Clean, accurate cutting and shaping with standard tools, helping installers achieve a professional finish with minimal waste.
- Durable, impact‑resistant outer surface maintains integrity in exposed locations, including rooftops, solar circuits and external mechanical services.
- Consistent, high‑quality appearance that enhances exposed pipework and supports professional installation standards across commercial and industrial projects.
- Suitable pipe lagging for a wide range of applications including solar thermal systems, steam lines, hot water services, industrial process pipework, tanks and vessels.
- Long service life due to resistance to UV exposure, ageing, moisture ingress and mechanical stress when installed correctly with HT Armaflex HT625 adhesive.
HT Armaflex Technical Specification
| Property | Value |
|---|---|
| Material | Flexible closed-cell EPDM elastomeric foam (EN 14304) |
| Thermal Conductivity (EN ISO 8497 / EN ISO 13787) | 0.042 W/m·K at 0°C (tubes) 0.045 W/m·K at 0°C (sheets/tapes) |
| Temperature Range (EN 14706 / EN 14707) | -50°C to +150°C (up to +85°C for self-adhesive products) |
| Fire Performance (EN 13501-1) | D(L)-s3,d0 (tubes) / D-s3,d0 (sheets & tape) |
| UL Fire Classification | UL 94 V-0 (self-extinguishing, no flaming droplets) |
| Water Vapour Resistance (EN 12086) | µ ≥ 4,000 (tubes) / µ ≥ 3,000 (sheets & tapes) |
| UV Resistance | Very good (EN ISO 4892-2) — suitable for outdoor use without jacketing |
| VOC Emissions | Meets French, Italian, Belgian, AgBB, Blauer Engel & Eurofins IAC GOLD requirements |
| Environmental Product Declaration | EPD-ARM-20200222-IBA1-EN (Type III EPD) |
| Formats | Flexible tubes, sheets and tapes |
| Applications | Solar thermal, steam lines, hot gas systems, dual‑temperature lines, vehicles, tanks and vessels |
| Storage Conditions | Store in dry, clean areas at 0°C to 35°C and 50–70% RH |
Frequently Asked Questions
What is HT Armaflex pipe insulation?+
HT Armaflex is a high‑temperature EPDM elastomeric insulation designed for continuous service up to 150°C. It offers excellent UV resistance, a closed‑cell vapour barrier and long‑term thermal stability for industrial, commercial and renewable energy applications.
What temperature range can HT Armaflex be used in?+
HT Armaflex can be used between −50°C and +150°C. Self‑adhesive versions are suitable up to +85°C. This makes it ideal for solar thermal systems, steam lines, hot gas pipework and high‑temperature services where standard nitrile rubber insulation is not suitable.
Is HT Armaflex suitable for outdoor use?+
Yes. HT Armaflex has very good UV resistance and can be installed outdoors without additional jacketing in most environments. This is a key advantage over standard elastomeric insulation, which typically requires protective coatings for external exposure.
What fire rating does HT Armaflex have?+
HT Armaflex is classified as D(L)-s3,d0 for tubes and D-s3,d0 for sheets and tapes under EN 13501‑1. It is self‑extinguishing, does not drip and does not spread flames. It also passes UL 94 V‑0 testing for vertical burn performance.
Does HT Armaflex prevent condensation?+
Yes. Its closed‑cell EPDM structure provides high water vapour diffusion resistance (µ ≥ 4,000 for tubes), helping prevent moisture ingress and reducing the risk of condensation on high‑temperature or dual‑temperature pipework.
Is HT Armaflex easy to install?+
HT Armaflex is flexible, lightweight and easy to cut, making it suitable for both new installations and retrofits. Armacell recommends using HT625 adhesive to ensure a fully sealed vapour barrier and long‑term system performance.
What pipe sizes and insulation thicknesses are available?+
HT Armaflex is available in a wide range of pipe diameters with 13 mm, 19 mm and 25 mm wall thicknesses. Sheets and tapes are also available for tanks, vessels and large surface areas.
Is HT Armaflex environmentally certified?+
Yes. HT Armaflex meets strict VOC requirements (French, Italian, Belgian, AgBB, Blauer Engel and Eurofins IAC GOLD) and carries a Type III Environmental Product Declaration (EPD‑ARM‑20200222‑IBA1‑EN).