pyrosleeve

Our Firesleeve (PGH.20/ROS) achieves UL 94 V-0 Flame Rating: What Does It Mean?

Fri, 21 Aug 2026 11:58:57 GMT

UL 94 Vertical Flame Testing

of our Firesleeve:

What this means: Pyrosleeve's Firesleeve ( PGH.20/ROS ) has achieved the highest classification within the UL 94 V-0, V-1 and V-2 vertical burning system, with no recorded afterflame following either flame application during independent flame-resistant performance testing of our silicone coated glass fibre firesleeves .

In August 2026, we commissioned Impact Solutions to carry out UL-94 vertical orientation flammability testing on our firesleeve (PGH.20/ROS).

The result? Pyrosleeve's Firesleeve achieved a V-0 classification , the highest classification within the UL-94 V-0, V-1 and V-2 vertical burning system.

Even more notably, the five specimens tested recorded a total afterflame time of 0 seconds . None of the specimens produced flaming drips and none burned up to the specimen clamp.

But what does UL 94 V-0 actually mean, and why is it important when choosing a firesleeve?

What is UL 94 flame testing?

UL 94 is a recognised flammability testing standard used to assess how a material behaves when exposed to a controlled flame.

Its full title is: "Test for Flammability of Plastic Materials for Parts in Devices and Appliances"

In simple terms, the test looks at whether a material continues to burn after a flame is applied and removed. It also looks at:

how quickly the material stops burning
whether it continues to glow
whether burning material drips from the specimen
whether flames travel up the specimen

For our test, Impact Solutions carried out a 50W Vertical Flame Test in accordance with UL 94 Paragraph 8.

The specimens were positioned vertically and exposed to a controlled methane flame for 10 seconds. The flame was then removed, and the 'afterflame' and 'afterglow' behaviour was recorded. The flame was subsequently reapplied for a further 10 seconds and the process repeated.

What does UL 94 V-0 mean?

The UL 94 standard includes several classifications for vertical burning performance, including:

V-0 <-- the highest of these 3 classifications.
V-1
V-2

To achieve V-0, individual specimens must have an afterflame time of no more than 10 seconds, while the total afterflame time for the five specimens must not exceed 50 seconds.

The material must also:

Not continue burning or glowing up to the holding clamp
Not produce flaming particles or drops that ignite the cotton indicator below
Meet the specified combined afterflame and afterglow time requirements (see table below)

In plain English...

A V-0 result means the material stops flaming very quickly when the flame source is removed and does not produce flaming drips that could ignite material underneath.

That is particularly relevant for applications where materials are installed close to cables, hoses, pipework or other components where uncontrolled flame spread or burning droplets could present an additional hazard.

What happened when Pyrosleeve's Firesleeve was tested?

The results from our firesleeve tests were very positive.

5 x Firesleeve specimens were tested and the results were:

Total afterflame time was: 0 seconds
No afterflame following either flame application

The laboratory also reported that none of our specimens showed signs of ignition while the flame was being applied. Following flame removal, there was only a limited cherry-red afterglow at the bottom of the material, together with a small amount of smoke ring production.

Importantly, none of the specimens produced flaming drips and none burned up to the specimen clamp.

The individual test results were:

The laboratory recorded a total afterflame time of 0 seconds , resulting in the final classification of V-0 .

Standard UL 94: 'V-0' vs 'V-1' vs 'V-2'

So, what is the difference between the three classifications of UL 94?

The V-0 classification therefore represents the most demanding of these three vertical burning classifications.

Why is UL 94 V-0 important for firesleeve?

Firesleeve is used to provide thermal and flame protection around components such as hydraulic hoses, fuel lines, cables, wiring and pipework installed into critical systems where components may be exposed to elevated temperatures or potential flame hazards.

Industries include:

Railways & rolling stock
Underground transport systems
Mining
Heavy-duty vehicles
Industrial machinery
Power generation
Marine applications
Fire suppression systems
Intelligent Robot Industries

When selecting a protective sleeve for a demanding application, engineers need to consider more than simply the maximum operating temperature. How a material behaves when exposed to flame is also a very important consideration, particularly where sleeving is installed close to heat-producing components.

A UL 94 V-0 result provides useful additional information about the flammability behaviour of the tested Firesleeve construction. For applications where flame resistance and protection from heat are important design considerations, this additional test data can help engineers make a more informed material selection.

Is UL 94 V-0 the same as a 250°C temperature rating?

No - and this is an important distinction!

UL 94 V-0 is a flammability classification , not a continuous operating temperature rating.

Our firesleeve has a stated continuous operating temperature of up to 250°C, while its UL 94 V-0 result relates specifically to its behaviour during the controlled vertical flame test.

These are two different characteristics and should not be confused.

The UL 94 test also does not by itself determine the complete fire performance or suitability of a product for every application. The laboratory report specifically notes that the results relate to the behaviour of the test specimens under the conditions of the test and should not be used as the sole criterion for assessing potential fire hazard in service.

How was Pyrosleeve tested?

The testing was carried out by Impact Solutions on Pyrosleeve PGH.20/ROS, with a nominal specimen thickness of 5.0 mm.

The specimens were prepared to the required dimensions and conditioned at 23 ± 2°C and 50 ± 5% relative humidity for at least 48 hours before testing.

During the test, specimens were mounted vertically and exposed to a controlled 50W methane flame. The flame was applied to the bottom edge of each specimen for 10 seconds, removed, and then reapplied for a further 10 seconds. Afterflame, afterglow, flame spread and flaming drips were recorded.

The testing was performed under UL 94:2014 , Paragraph 8. The report identifies the 50W Vertical Flame Test as a non-UKAS test within the laboratory's report.

What does this mean for Pyrosleeve customers?

The V-0 result gives customers and engineers another piece of independently generated test data when evaluating Pyrosleeve's Firesleeve for demanding applications.

Combined with the product's silicone-coated glass fibre construction and thermal protection capabilities, the result demonstrates the importance we place on testing , quality and continual product development .

We believe engineers should be able to specify protective textile products with confidence — supported by clear, meaningful technical information rather than simply relying on marketing claims.

Frequently Asked Questions

What is a UL 94 V-0 rating?

UL 94 V-0 is the highest classification within the V-0, V-1 and V-2 vertical burning classification system. It indicates that the tested material meets stringent requirements for afterflame and afterglow behaviour and does not produce flaming drips during the test.

Is V-0 the highest UL 94 rating?

YES

V-0 is the highest classification among the UL 94 vertical V-0, V-1 and V-2 classifications. Other UL 94 classifications and test methods exist, so it is more accurate to describe V-0 specifically as the highest of these three vertical classifications.

Did Pyrosleeve pass the UL 94 test?

YES - Our Firesleeve (PGH.20/ROS) achieved a V-0 classification during the UL-94 vertical orientation flammability test carried out by Impact Solutions in August 2026.

What was Pyrosleeve's afterflame time?

The five specimens recorded a total afterflame time of 0 seconds. Each specimen recorded 0 seconds after the first and second flame applications.

Did Pyrosleeve produce flaming drips?

NO - none of the five specimens produced flaming drips during the UL 94 test. None of the specimens burned up to the holding clamp.

Does UL 94 V-0 mean Pyrosleeve can operate continuously at a particular temperature?

NO - UL 94 V-0 is a flammability classification and should not be interpreted as a continuous operating temperature rating. Temperature performance and flame performance are separate characteristics.

Test results relate to the specimens tested under the conditions of the laboratory test. They should not be considered the sole criterion for assessing fire hazard or suitability for a particular application.

How Long Does Firesleeve Last ?

Fri, 24 Jul 2026 10:49:16 GMT

A Technical Guide to Service Life, Inspection & Replacement

How Long Does Firesleeve Last?

When protecting hydraulic hoses, fuel lines, electrical cables and industrial pipework from extreme temperatures, firesleeve is often expected to perform reliably for many years with little maintenance. However, one of the most common questions engineers, maintenance teams and procurement specialists ask is:

"How long should firesleeve last?"

The honest answer is that there is no fixed lifespan.

Unlike components with predetermined replacement intervals, the service life of a high-quality silicone-coated glass fibre firesleeve depends on numerous factors including operating temperature, environmental conditions, mechanical wear, chemical exposure and installation quality.

In controlled industrial environments, premium firesleeve may remain fully serviceable for many years. In harsher environments involving molten metal splash, continuous abrasion, hydraulic oil contamination or outdoor UV exposure, inspections should be carried out more frequently and replacement may be required sooner.

Understanding what influences firesleeve longevity helps maximise equipment protection, reduce unplanned downtime and improve maintenance planning.

What Determines the Service Life of Firesleeve?

Several interacting factors influence how long firesleeve continues to provide effective thermal protection.

Operating Temperature

Temperature is naturally the biggest influence.

A quality silicone-coated E-glass firesleeve is typically designed for:

Continuous operating temperatures around 260°C
Short-duration exposure to significantly higher temperatures
Protection from molten metal splash approaching 1,200°C

Continuous operation close to maximum design temperatures accelerates ageing of the silicone elastomer coating.

The glass fibre insulation itself remains stable at temperatures beyond the limits of the silicone coating, but repeated thermal cycling gradually hardens elastomers over time.

Lower operating temperatures generally result in substantially longer service life.

Thermal Cycling

Many industrial systems repeatedly heat and cool throughout the working day.

This repeated expansion and contraction creates stresses within the silicone coating, with thousands of heating and cooling cycles over several years can eventually lead to:

surface hardening
reduced flexibility
minor cracking
loss of elasticity

This ageing process is gradual and should be monitored during routine inspections.

Mechanical Abrasion

In many applications, abrasion causes premature replacement long before heat damage occurs.

Typical sources include:

vibrating hydraulic hoses
rubbing against brackets
cable movement
hose clamps
engine vibration
moving machinery

Silicone coatings provide excellent abrasion resistance, but no protective sleeve is immune to continuous mechanical wear. Proper routing and adequate support significantly extends service life.

Chemical Exposure

Industrial environments often expose firesleeve to:

hydraulic fluids
lubricating oils
diesel fuel
petrol
coolants
cleaning chemicals
dilute acids
alkalis

High-quality silicone elastomers offer excellent resistance to many industrial fluids. However, prolonged immersion or exposure to aggressive chemicals beyond the material's design limits can accelerate degradation.

Always verify chemical compatibility for specialist applications.

Ultraviolet (UV) Exposure

Outdoor equipment presents different challenges. Over extended periods UV radiation slowly ages most elastomeric materials. Although silicone performs significantly better than many synthetic rubbers, long-term outdoor installations should still form part of scheduled inspection programmes .

Installation Quality

Incorrect installation remains one of the leading causes of premature failure. Common mistakes include:

stretching the sleeve excessively
forcing it over oversized fittings
insufficient clearance around bends
poor end finishing
inadequate clamping where required

Correct installation minimises unnecessary mechanical stresses throughout the product's life.

Common Failure Modes of Firesleeve:

A well-manufactured firesleeve rarely fails without visible warning signs. Understanding typical failure mechanisms allows replacement before protection is compromised. Common failure modes include:

Torn Glass Fibre

Mechanical damage can eventually penetrate through the silicone coating into the knitted glass fibre substrate. This significantly reduces thermal protection and should normally trigger replacement.

Localised Heat Damage

Exceptional overheating may produce:

blistering
charring
burnt silicone
local hardening

These indicate temperatures have exceeded the intended operating conditions.

Contamination

Heavy deposits of:

oil
carbon
welding debris
molten metal residue

may conceal damage during inspections. Cleaning before assessment is recommended where practical.

How Often Should Firesleeve Be Inspected?

Inspection frequency depends on the application's operating environment. As a general guide:

Where equipment is considered safety-critical, inspections should always follow the machinery manufacturer's maintenance schedule.

What Should You Look For During Inspection?

Maintenance personnel should inspect for:

✔ Cuts

✔ Tears

✔ Abrasion

✔ Missing silicone

✔ Burn marks

✔ Brittle coating

✔ Oil saturation

✔ Loose securing methods

✔ Heat discolouration

✔ Exposed glass fibre

If any of these conditions are observed, further assessment should be carried out before returning equipment to service.

Does Firesleeve Wear Out Suddenly?

Generally, no.

Unlike some protective products that fail catastrophically, quality firesleeve normally deteriorates gradually.

This progressive ageing provides maintenance teams with opportunities to identify deterioration during routine inspections before thermal protection is significantly compromised.

Can Firesleeve Be Reused?

Where firesleeve has been carefully removed without damage and remains in excellent condition, reuse may be technically possible in some non-critical applications. However, in safety-critical environments it is generally recommended that damaged or heavily aged firesleeve is replaced rather than reused. Replacing worn firesleeve is usually inexpensive compared with the potential cost of hose failure, equipment damage or unplanned downtime.

Does Manufacturing Quality Affect Service Life?

Absolutely! Not all firesleeves are manufactured to the same standards.

Factors that influence long-term durability include:

Glass fibre yarn quality
Braid or knit consistency
Silicone formulation
Coating thickness
Curing process
Dimensional accuracy
Quality control
Batch traceability

Consistent manufacturing processes help ensure that every production batch delivers predictable thermal performance and mechanical durability. For engineers specifying firesleeve, selecting a manufacturer with established UKAS accredited quality systems and robust process controls can provide greater confidence in long-term performance.

Maximising Firesleeve Service Life

The following practices can help extend operational life:

Select the correct diameter for the application.
Avoid excessive stretching during installation.
Prevent continuous rubbing against sharp edges.
Support hoses and cables correctly.
Inspect regularly as part of planned maintenance.
Replace damaged sections promptly.
Use products appropriate for the operating temperature and environment.
Source firesleeve from manufacturers with consistent quality control.

Frequently Asked Questions

Is firesleeve a consumable product?

Not in the traditional sense. Firesleeve is designed as a durable protective component, but like any engineering material it will gradually age in service and should be inspected periodically.

Can firesleeve last 10 years?

In stable industrial environments with moderate temperatures and minimal abrasion, high-quality firesleeve can remain serviceable for many years. Actual service life depends on operating conditions and maintenance.

What causes firesleeve to fail?

The most common causes are mechanical abrasion, excessive heat, incorrect installation, chemical attack and prolonged ageing.

Should damaged firesleeve be repaired?

Minor external contamination may be cleaned, but firesleeve with exposed glass fibre, significant abrasion or heat damage is generally best replaced.

Does thicker silicone mean longer life?

Not necessarily. Durability depends on the overall design, material quality, coating formulation, curing process and manufacturing consistency—not just coating thickness.

Conclusion

There is no universal service life for firesleeve because every application places different demands on the material. The key to achieving long-term performance lies in selecting a high-quality product, installing it correctly and carrying out regular inspections as part of a preventative maintenance programme.

By understanding the factors that influence ageing—including temperature, abrasion, thermal cycling and environmental exposure—engineers can make informed decisions that maximise protection and minimise downtime.

At Pyrosleeve , our silicone-coated glass fibre firesleeves are manufactured in the UK under an UKAS Accredited ISO 9001 quality management system using carefully controlled production processes. This enables us to provide consistent, reliable thermal protection for demanding industrial applications, helping customers achieve dependable performance throughout the product's service life.

Why UK Manufactured Firesleeve Offers Better Performance, Quality and Reliability

Tue, 14 Jul 2026 15:17:19 GMT

Why choose a UK manufactured firesleeve?

When specifying silicone coated Firesleeves for hydraulic hoses, fuel lines, cables and industrial equipment, quality, consistency and reliability are essential.

Firesleeve is designed to provide thermal insulation and protection against extreme heat, molten metal splash and flame exposure, helping to improve safety and extend equipment life in demanding industrial environments.

With an increasing number of low-cost imported products available, many engineers and procurement professionals are asking an important question:

Why choose a UK manufactured firesleeve?

For businesses where performance and compliance matter, the answer is simple – British manufacturing continues to set the benchmark for quality, innovation and technical expertise.

British Manufacturing: Built on Quality and Innovation

The UK has a long-standing reputation for manufacturing excellence, combining engineering expertise with rigorous quality standards.

According to Make UK :

Manufacturing contributes around £220 billion to the UK economy
Supports approximately 2.6 million jobs
Accounts for 48% of UK business research and development
Represents 17% of total UK business investment

These figures demonstrate that manufacturing remains one of Britain's most innovative and economically important sectors.

For specialist products such as high temperature firesleeves manufactured in Britain, this commitment to continuous improvement translates into reliable, high-performance solutions that customers can trust.

Why Product Origin Matters

Not all firesleeve products are manufactured to the same standards.

While imported products may offer lower upfront costs, differences in manufacturing processes, material quality and quality control can affect long-term performance and reliability.

For critical applications, choosing a British-made firesleeve provides greater confidence in:

Consistent manufacturing quality
Reliable high-temperature protection
Product traceability
Responsive technical support
Shorter, more resilient supply chains
Compliance with recognised British manufacturing standards

When protecting hydraulic hoses, fuel lines and electrical cables in safety-critical applications - including passenger rail, marine, offshore and heavy industry - dependable thermal protection is essential. Product failure can lead to equipment damage, operational downtime and increased safety risks.

The Advantages of Buying UK Manufactured Firesleeve

Working with a UK manufacturer offers benefits that extend well beyond the product itself.

Consistent Quality

British manufacturers operate under rigorous quality management systems, ensuring products are manufactured consistently and meet demanding performance requirements.

Pyrosleeve Ltd (with Sister Company Pyroglass Ltd ) is proudly ISO 9001:2015 UKAS accredited , demonstrating its commitment to continuous quality improvement across every stage of production.

Technical Expertise

Selecting the correct firesleeve isn't simply about choosing a size.

Different industries and applications require varying levels of heat resistance, abrasion protection and environmental performance.

Working directly with an experienced UK manufacturer gives customers access to knowledgeable technical advice, helping specify the right solution for each application.

Reliable Supply

Global supply chain disruption has highlighted the importance of dependable sourcing.

Choosing a UK manufacturer helps reduce lead times, improves communication and provides greater confidence in product availability.

Supporting British Manufacturing

Purchasing British-made industrial products also supports skilled employment, engineering innovation and investment within the UK manufacturing sector.

Manufacturing to Recognised Standards

Choosing a UK manufacturer provides confidence that products are produced under recognised quality management systems and are supported by comprehensive documentation, technical expertise and traceability.

For industries including rail, offshore, marine, mining and heavy engineering, these factors are often just as important as the product itself.

Made in Britain: A Mark You Can Trust

One of the strongest indicators of genuine British manufacturing is the Made in Britain mark.

Established in 2013, Made in Britain is a not-for-profit organisation that promotes and supports UK manufacturers while protecting the integrity of British-made products.

Membership is only available to businesses that meet strict eligibility requirements, including manufacturing their products in Great Britain and demonstrating that the majority of their value chain remains within the UK.

Today, more than 2,150 British manufacturers proudly display the Made in Britain mark, providing customers with confidence in the origin and authenticity of the products they purchase.

Membership reflects a long-standing commitment to manufacturing quality products in Britain.

Managing Director Sara Pullen explains:

"We are a family-owned independent business proud of our long-standing reputation as a British manufacturer. Being a member of Made in Britain and displaying the mark is evidence that we manufacture to the highest standards."

British Manufacturing Supports Sustainability

Sustainability is becoming an increasingly important consideration for industrial buyers.

Choosing products manufactured in the UK can help reduce transport carbon footprints and support supply chains operating under robust environmental and employment standards.

Made in Britain also encourages its members to improve sustainability through initiatives such as its Green Growth Programme , helping manufacturers work towards lower carbon operations and Net Zero ambitions.

By investing in durable, high-quality products manufactured closer to home, businesses can make purchasing decisions that support both operational performance and responsible manufacturing.

Manufactured in Lancashire, Trusted Worldwide

The North West remains Britain's largest manufacturing region, making it the ideal home for companies producing specialist industrial products.

From its Lancashire manufacturing facility, Pyrosleeve Ltd has been designing and manufacturing a comprehensive range of firesleeves , high-temperature insulation products and specialist textile solutions for customers throughout the UK and around the world since 1987.

Our range includes firesleeve for hydraulic hose protection, thermal insulation sleeving, exhaust lagging, woven tapes and high-temperature sealing products

With decades of textile engineering expertise, the company supplies products that protect equipment operating in some of the world's most demanding industrial environments such as passenger Railways, Maritime, Mining and Offshore drilling.

Although manufactured in Lancashire, Pyrosleeve products are supplied to customers worldwide, demonstrating that British engineering continues to be trusted across international industries.

From sourcing the very best quality texturised glass fibre yarns from the very best European yarn producers, to knitting those yarns in-house to create the glass fibre sleevings which we then coat in a high grade silicone rubber – our processes are performed in-house at our facilities in Preston.

By overseeing every single stage of production , we ensure exceptional product quality and consistency across our entire range of high temperature products from Firesleeves, to pyrotapes, high temperature seals and retro-fit velcro firesleeve closures.

Why Engineers Choose Pyrosleeve Ltd

Since 1987, the company has built its reputation on quality, technical expertise and customer service.

As a family owned independent British manufacturer, the company combines advanced textile engineering with rigorous quality management to produce reliable thermal protection products that customers can specify with confidence.

Whether you're looking for firesleeve made in the UK , high-temperature sealing materials or specialist thermal insulation solutions, choosing a British manufacturer offers significant advantages in quality, support and supply chain reliability.

Choose British-Made Quality

When product performance matters, choosing a trusted UK manufacturer makes all the difference.

As a Made in Britain member and ISO 9001:2015 UKAS accredited manufacturer, we remain committed to delivering high-performance solutions that help customers protect people, equipment and operations.

Choosing a UK manufacturer means choosing quality, consistency and technical expertise backed by decades of manufacturing experience.

At Pyrosleeve Ltd, every firesleeve is manufactured in Lancashire using carefully controlled production processes and rigorous quality standards to deliver dependable performance in demanding industrial environments.

If you're looking for a trusted UK manufacturer of firesleeve, our technical team is here to help you select the right solution for your application.

What is BS EN 45545-2:2020+A1:2023?

Wed, 24 Jun 2026 12:50:42 GMT

The European "Gold Standard" for

Railway Fire Safety

When a product is tested to EN 45545-2:2020 , it means it has passed one of the most stringent fire safety standards in the European railway industry.

This certification ensures that materials used in railway and underground transport systems are designed to resist fire, minimise flame spread, reduce smoke generation and limit the release of toxic gases in the event of a fire.

For railway operators, manufacturers and infrastructure providers, compliance with EN 45545-2:2020 is essential for protecting passengers, staff and critical systems in high-risk transport environments.

What Is EN 45545-2:2020?

EN 45545-2:2020 is the European standard that defines fire safety requirements for materials and components used in railway vehicles. The standard evaluates how products behave under fire conditions, specifically focusing on:

1. Flame Spread - Assesses how quickly a material ignites and burns.

Test Standard: EN ISO 4589-2

2. Smoke Density - Measures how much smoke is produced & how severely visibility is reduced during a fire.

Test Standard: ISO 5659-2

3. Toxicity - Determines whether smoke emissions contain dangerous or potentially lethal gases such as carbon monoxide or hydrogen cyanide.

Test Standard: BS EN 17084:2018

Together, these tests ensure passengers have more time to safely evacuate railway vehicles and tunnels during a fire emergency.

The importance of EN 45545-2:2020

EN 45545-2 harmonises railway fire safety regulations across Europe and is widely recognised as the benchmark standard for rail vehicle fire protection.

The standard is critical because it sets strict performance requirements for:

Flame spread control
Heat release reduction
Smoke suppression
Toxic gas emission control

In confined environments such as railway carriages, underground tunnels and metro systems, these factors are vital for passenger safety and emergency evacuation.

Fire Risks in Rail and Underground Environments

Rail and underground transport systems operate in enclosed spaces where heat, vibration and limited ventilation can rapidly escalate fire risks.

Common fire hazards within railway infrastructure include:

Electrical cables exposed to abrasion, vibration, and high engine temperatures
Hydraulic and fuel lines routed near hot engines and braking systems
Poor ventilation in tunnels and underground routes
Sparks generated from braking, grinding, and maintenance operations

Without adequate protection, hoses, cables and wiring can become ignition points that compromise critical systems and passenger safety.

This is why fire protection products such as Firesleeve are essential within railway applications.

Where Is Firesleeve Used in Railway Vehicles?

Firesleeve is installed over hydraulic hoses, electrical harnesses and fuel lines to provide protection against:

Extreme heat
Flame exposure
Abrasion damage
Mechanical wear

By protecting critical systems, Firesleeve helps reduce the likelihood of fire caused by damaged cables or fluid lines.

Common Applications for Firesleeve in railways:

Firesleeves are widely used in:

Underground transport rolling stock
Locomotive engine compartments
Metro and subway infrastructure
Hydraulic and pneumatic braking systems
Electrical wiring near heat-emitting equipment
Emergency lighting systems
Fire suppression system components
Critical evacuation route infrastructure

What Does “HL3 Rated Under R22” Mean?

If a product is classified as HL3 rated under R22 , it has achieved the highest hazard level classification under EN 45545-2.

HL3 certification is required for the most demanding railway environments, including:

Underground metro systems
Sleeper trains
Long tunnel operations
High-capacity passenger rail systems

These applications present increased fire risks due to difficult evacuation conditions and confined operating environments.

An HL3 rating demonstrates that the product is suitable for use in virtually any railway application worldwide.

How Did Our Firesleeve Perform?

When tested in accordance with EN 45545-2:2020 requirements, our Firesleeve achieved compliance with:

R22 requirements
R23 requirements
HL1, HL2, and HL3 hazard level classifications

This confirms our Firesleeve is suitable for use across a wide range of rail and underground transport applications around the world.

Why the Rail Industry Chooses Our Firesleeve

Our Firesleeve, sold under the trade name Pyrosleeve , has been specified throughout rail and underground industries because it delivers exceptional thermal and fire protection performance.

Key Features and Benefits

Firesleeve is designed for high-temperature exposure
It does not support combustion
UL94 V-0 flammability rated
Continuous operating temperature up to 260°C
Retains 75% tensile strength at 340°C
Excellent abrasion resistance
Halogen free
100% PFAS free
Conflict minerals free
REACH compliant
RoHS compliant
POPs compliant
We are a UKAS accredited ISO 9001:2015 company

Other Standards Our Firesleeve Complies With:

Our Firesleeves are independently tested and compliant with:

BS EN 45545-2:2020+A1:2023
BS EN ISO 4589-2:2017
ISO 5659-2
NF X 70-100-1:2006
NF X 70-100-2:2006

These standards cover:

Fire behaviour
Oxygen index testing
Smoke generation
Toxic gas analysis

Learn More About EN 45545-2:2020

For further information regarding the European railway fire safety standard, visit the official BSI guidance page.

For technical advice, product specifications, or application support, contact our team today.