UIC 564-2: Fire Safety Regulations for International Railway Vehicles

UIC 564-2 is a set of technical regulations established by the International Union of Railways (UIC) governing “Fire Protection and Firefighting Measures in Passenger-Carrying Railway Vehicles.” Before the unification of the European standard EN 45545-2, UIC 564-2 was the de facto global standard for railway fire safety. Today, it remains a mandatory compliance benchmark for railway projects in Southeast Asia, the Middle East, Africa, and for the Maintenance, Repair, and Operations (MRO) of legacy European fleets.

1. Why is UIC 564-2 Still Relevant?

Although the EU has mandated EN 45545-2, the UIC 564-2 standard has not exited the global supply chain. For export-oriented manufacturers, understanding this standard is critical.

It applies primarily to three key scenarios:

• Non-EU National Railway Projects: Tender documents for railways in countries such as Vietnam, Thailand, and Egypt often directly cite UIC standards.
• Maintenance & Refurbishment (MRO): Thousands of trains manufactured in the 90s (e.g., legacy ICE, TGV, and Intercity fleets) require replacement parts—curtains, seats, carpets—that must comply with their original certification basis: UIC 564-2.
• Cross-Border Vehicles: International carriages operating between EU and non-EU member states.

2. Core Technical Framework: Classification of Appendices

UIC 564-2 is not a single test, but a collection of test methods categorized by material application. It defines specific fire resistance requirements through various Appendices.

Unlike modern standards that emphasize “Smoke & Toxicity,” the core logic of UIC 564-2 focuses on “Flame Retardancy” and “Anti-Dripping” properties.

Quick Reference: Key Appendices

Appendix No.	Applicable Material	Core Testing Focus
Appendix 4	Rigid Materials	Spread of flame speed. Applicable to laminates, plywood, and wall panels.
Appendix 5	Textiles	Vertical flammability, afterflame time, anti-dripping. Applicable to curtains, blinds, and bedding.
Appendix 6	Rubber Seals	Fire resistance of door and window sealing strips.
Appendix 8	Foam Materials	Damaged length and self-extinguishing properties of seat foam/fillers.
Appendix 13	Seats (Complete Assembly)	Fire resistance of the finished seat (100g paper cushion test).

Note: Suppliers often confuse appendix numbers. Always select the test method based on “Material Application” rather than memory.

3. Deep Dive: Textile and Curtain Testing (Appendix 5)

UIC 564-2 Appendix 5 is a specialized vertical flammability test for flexible textiles such as curtains, blackout blinds, and headrest covers. This is the core compliance benchmark that textile suppliers (such as BEGOODTEX customers) must meet for product certification.

3.1 Test Method & Parameters

• Sample Size: 100mm x 300mm, vertically suspended.
• Ignition Source: Propane/Butane gas flame, impinging on the bottom edge at a 45° angle.
• Ignition Time: 30 seconds (continuous application).
• Severity: Compared to the 12-second ignition in aviation standards, the 30-second continuous burn in UIC is a rigorous test that often leads to burn-through or dripping in inferior fabrics.

3.2 Pass/Fail Criteria

To obtain a passing report, the material must meet all the following conditions:

1. Afterflame Time: Upon removal of the burner, any flame must self-extinguish within 10 seconds.
2. No Burning Droplets: Molten drips must not ignite the filter paper placed below the sample (Zero Tolerance).
3. Damaged Area: The carbonized or destroyed area must not exceed specified physical limits.

Expert Note: Standard polyester fabrics frequently fail the “No Burning Droplets” criteria. Passing this test usually requires deep fiber modification for flame retardancy and anti-dripping properties.

4. Deep Dive: Foam and Rigid Material Testing

Appendix 8: Foam Materials

Targeting seat foam and fillers. The test uses an alcohol burn method. The core metric is Self-Extinguishing capability. Once the fire source is removed, the foam must extinguish rapidly with minimal damaged length.

Appendix 4: Rigid Materials

Targeting interior wall panels, table tops, etc. This tests not only for combustion but for the speed of flame spread across the surface. This often involves radiant heat testing, requiring high thermal stability.

5. Critical Comparison: UIC 564-2 vs. EN 45545-2

Understanding the difference between the “Classic” and “Modern” standards helps suppliers formulate the right product strategy.

Dimension	UIC 564-2 (Classic Standard)	EN 45545-2 (Modern EU Standard)
Status	Int’l Railway Union Standard (Active in select regions)	Mandatory EU Law (TSI)
Focus	Physical Combustion (Burn/Drip)	Comprehensive (Burn + Smoke Density + Toxicity)
Ignition Difficulty	Very High (30s continuous ignition)	Method dependent (e.g., ISO 5660 Heat Release)
Smoke/Toxicity	Usually no quantitative requirements	Extremely Strict (Ds max, VOF4, CIT)
Market	SE Asia, Middle East, Legacy Refurbishment	Europe, Australia, High-end Exports

6. Expert Advice: Supply Chain Strategy

Based on our experience at BEGOODTEX, we recommend a strategy of “Downward Compatibility” when dealing with the transition between old and new standards.

Strategy: Exceed to Succeed

If your product is already certified to EN 45545-2 R1 (HL2 or HL3), the material’s physical flame retardancy is typically sufficient to pass the UIC 564-2 Appendix 5 test.

Technical Logic: EN standards require not only flame resistance but also low smoke and low toxicity. Fabrics that pass EN tests possess high chemical stability. Therefore, we recommend using dual-capable fabrics, like the BEGOODTEX™ Rail-Tex series, allowing one inventory SKU to fulfill both modern European new-builds and overseas legacy projects.

Avoid Pitfalls: Appendix Confusion

Warning: Do not use Appendix 4 criteria to test curtains, and do not use Appendix 5 for rigid panels. Incorrectly filling out the submission form will result in an invalid test report. For curtains and shades, you must specify Appendix 5.

FAQ: Frequently Asked Questions