Armacell Pipe Insulation

Armacell Pipe Insulation — Complete Armaflex Range

Armacell is the world's leading manufacturer of flexible elastomeric insulation, with over 60 years of engineering expertise. Their Armaflex products are specified by building services engineers, HVAC contractors, refrigeration engineers and plumbers across the UK and globally.

At Pipelagging, we stock a wide range of Armacell pipe insulation products, including standard Armaflex Class O pipe insulation, Armaflex EVO, Armaflex HT Solar, Armaflex Ultima, Armaflex Rail, NH Armaflex Smart, Armaflex sheet insulation, self-seal pipe insulation, adhesives and sealing tapes.

Armaflex pipe insulation is commonly used for HVAC systems, refrigeration pipework, chilled water services, heating pipework, air conditioning installations and condensation control. Its closed-cell structure helps reduce heat loss, prevent condensation and protect pipework in domestic, commercial and industrial environments.

Why Choose Armaflex Pipe Insulation?

Armaflex pipe insulation is widely regarded as the industry standard for flexible elastomeric pipe lagging. It combines strong thermal performance with excellent condensation control, good fire performance and easy installation.

Unlike some traditional insulation materials, Armaflex has a closed-cell structure that helps resist moisture ingress. This makes it particularly suitable for cold pipework, chilled water systems, refrigeration lines and air conditioning pipework where condensation control is critical.

• Excellent condensation control — ideal for chilled water, AC and refrigeration systems
• Class O fire performance — suitable for many commercial building services applications
• Flexible and easy to install — works well around bends, valves and fittings
• Wide product range — pipe sections, self-seal tubes, sheets, tape and adhesive
• Trusted manufacturer — produced by Armacell, a global insulation specialist
• Suitable for trade and domestic use — used by contractors, engineers, plumbers and DIY customers

Browse by Product Range

• Armaflex Pipe Insulation — Class O rated, the industry standard for HVAC, refrigeration and plumbing applications
• Armaflex EVO — next-generation elastomeric insulation with improved environmental credentials
• Armaflex HT Solar — high-temperature pipe insulation for solar thermal systems up to 150°C
• Armaflex Ultima — premium elastomeric insulation with enhanced fire performance
• Armaflex Rail — specialist insulation for rail and transport applications
• NH Armaflex Smart — ammonia-resistant insulation for industrial refrigeration applications
• Armaflex Sheet Insulation — flexible sheet insulation for valves, fittings, tanks and irregular surfaces
• Armaflex Self Seal — pipe insulation with a factory-applied adhesive seam for faster installation

Browse by Application

• Condensation Control — closed-cell insulation for chilled water, refrigeration and cold pipework
• Refrigeration Pipe Insulation — for AC systems, cold rooms and refrigeration pipework
• Outdoor Pipe Insulation — insulation options for exposed external pipework

Common Applications for Armaflex

• Heating pipe insulation
• Chilled water systems
• Air conditioning pipework
• Commercial HVAC installations
• Refrigeration pipework
• Heat pump pipe insulation
• Condensate pipe protection
• Plant room pipework
• Commercial building services
• External pipework, when correctly protected from UV and weather exposure

What Thickness of Armaflex Do I Need?

The correct Armaflex wall thickness depends on pipe size, operating temperature, ambient conditions and whether the pipework is used for heating, chilled water or refrigeration.

For domestic heating and plumbing systems, thinner wall sections are often used to reduce heat loss. For chilled water, air conditioning and refrigeration systems, thicker insulation may be needed to prevent condensation and meet project specification requirements.

Commercial projects may also need to consider Building Regulations Part L and BS 5422 insulation guidance. If you are unsure which thickness to choose, read our Armaflex Pipe Insulation Thickness Guide or contact our team for technical advice.

Browse by Pipe Size

• 15mm Pipe Insulation
• 22mm Pipe Insulation
• 28mm Pipe Insulation
• 35mm Pipe Insulation
• 42mm Pipe Insulation
• 54mm Pipe Insulation

Armacell Accessories

• Armaflex Adhesive — Armaflex 520 and specialist adhesives for sealing joints, seams and fittings
• Armaflex Tape — self-adhesive tape for joints, repairs, edges and insulation finishing

Helpful Armaflex Guides

• Armaflex Pipe Insulation Thickness Guide
• Armaflex vs Rockwool Pipe Insulation
• Armaflex vs K-Flex Pipe Insulation
• Armaflex vs Tubolit Pipe Insulation
• Pipe Insulation Wall Thickness Guide

About Armacell

Founded in 1954, Armacell pioneered flexible foam insulation and today operates manufacturing facilities across Europe, the Americas and Asia. Their Armaflex range is the benchmark specification for elastomeric pipe insulation worldwide, trusted for its combination of thermal performance, condensation control, fire safety and installation flexibility.

Key reasons engineers specify Armacell products include:

• Class O fire rating — widely specified for commercial pipe insulation applications
• Closed-cell structure — helps prevent condensation on cold pipework
• Wide temperature range — suitable for many heating, cooling and refrigeration applications depending on grade
• Global approvals — used across UK, European and international building services projects
• Installation flexibility — suitable for straight runs, bends, fittings and complex pipework
• Specialist grades available — including solar, rail, refrigeration and low-smoke options

Frequently Asked Questions

What is Armaflex pipe insulation?
Armaflex is a flexible elastomeric pipe insulation manufactured by Armacell. It is commonly used for heating, chilled water, air conditioning, refrigeration and HVAC pipework.

Is Armacell the same as Armaflex?
Armacell is the manufacturer. Armaflex is their flagship brand of flexible elastomeric pipe insulation. Armacell also manufactures other insulation products, including Tubolit and specialist technical insulation ranges.

What is the difference between Armaflex and Tubolit?
Both are Armacell insulation products. Armaflex is the premium elastomeric insulation range and is widely used for commercial HVAC, refrigeration and condensation control. Tubolit is generally a more economical option suited to domestic plumbing and heating. Read our full Armaflex vs Tubolit comparison guide.

Does Armaflex stop condensation?
Yes. Armaflex has a closed-cell structure designed to help prevent condensation forming on chilled water, refrigeration and air conditioning pipework when correctly specified and installed.

Is Armaflex suitable for outdoor use?
Armaflex can be used outdoors when protected from UV exposure and weathering with a suitable covering, coating or external protection system. For exposed external pipework, view our outdoor pipe insulation range.

Is Armaflex Class O?
Standard Armaflex Class O pipe insulation is widely specified for commercial building services applications where Class O fire performance is required.

Can Armaflex be used on heating pipes?
Yes. Armaflex can be used on heating pipework to reduce heat loss and improve system efficiency, provided the correct grade and wall thickness are selected.

Can Armaflex be used on refrigeration pipework?
Yes. Armaflex is commonly used for refrigeration, chilled water and air conditioning pipework because of its condensation control properties and closed-cell construction.

Can Armaflex be used on heat pump pipework?
Yes. Armaflex is suitable for many heat pump heating and cooling pipework applications, depending on operating temperature, location and specification requirements.

What pipe sizes are available?
Armaflex is available in common domestic and commercial pipe sizes including 15mm, 22mm, 28mm, 35mm, 42mm and 54mm, with larger commercial sizes also available across the range.

Where can I find the Armaflex thickness guide?
You can read our Armaflex Pipe Insulation Thickness Guide for wall thickness selection advice, including guidance around pipe size, application and specification requirements.

Do you stock the full Armacell range?
Yes. Pipelagging stocks a broad Armacell range, including Armaflex pipe insulation, Armaflex EVO, HT Solar, Ultima, Rail, NH Armaflex Smart, sheet insulation, self-seal insulation, adhesives and tapes.