What are the different standards for Rail Pads?

What do rail pad standards actually control?

Rail pads are elastic elements placed between the rail foot and the sleeper or baseplate. A standard that governs rail pads has to control four groups of properties, because a pad that is correct for one track form can be wrong for another:

Dimensions and tolerances: the pad footprint must match the rail foot profile and the fastening system, with controlled thickness and flatness.

Mechanical performance: static and dynamic vertical stiffness, damping behaviour, compression set and resistance to repeated loading.

Durability: ageing, ozone resistance, water absorption and low-temperature behaviour, verified over the service life of the fastening.

Electrical insulation: for track-circuit compatibility, insulated fastenings must hold a defined minimum resistance.

European framework: EN 13481 and the EN 13146 test series

In European practice a rail pad is qualified as part of a complete fastening system rather than as a standalone article. EN 13481-2 sets the performance requirements for fastening systems on concrete sleepers, including vertical stiffness classes and component limits, while the test methods come from the EN 13146 series:

Reference standard	Scope	Typical verification
EN 13481-2	Performance requirements for fastening systems on concrete sleepers	System acceptance: stiffness class, clamping force, component limits
EN 13146-3	Test method	Static and dynamic stiffness of the pad within the system
EN 13146-4	Test method	Behaviour under repeated loading (fatigue)
EN 13146-5	Test method	Electrical resistance of the insulated fastening

Chinese practice: TB/T and GB/T

For Chinese railway projects, rubber rail pads are commonly specified to TB/T 2626, the railway-industry technical standard for rubber rail pads, and the fastening system must satisfy the TB/T performance requirements applicable to the line category (passenger, freight, heavy-haul or high-speed). Material-level properties are verified with the national GB/T rubber test methods: GB/T 528 for tensile strength and elongation at break, GB/T 531.1 for Shore hardness and GB/T 7759 for compression set. Pads used in concrete-sleeper fastenings must also demonstrate the electrical resistance required for signalling circuits.

Regional frameworks: AREMA, BS and JIS

North American tenders usually follow AREMA recommended practice for track components, with pad properties agreed from project specifications rather than from a single pad standard. Legacy British designs still reference BS 113 rail sections, and Japanese contractors commonly apply JIS-based material practice. In every framework the same engineering logic applies: the pad must be dimensionally matched to the rail profile and fastening type, and its stiffness class must suit the axle load and line speed.

Choosing the right standard for your order

Confirm the rail profile and fastening system first; the pad drawing must match both.

Select the stiffness class for the axle load: heavy-haul lines need stiffer pads than metro or tram applications.

Check the insulation requirement whenever the line uses track circuits.

Request type-test reports and batch material certificates before shipment.

Frequently asked questions

Is EN 13481 a rail pad standard?

No. EN 13481-2 defines the performance requirements of complete fastening systems on concrete sleepers. The pad is one component of that system, and its properties are verified through the EN 13146 test methods within the system assembly.

Which Chinese standard covers rubber rail pads?

Rubber rail pads for Chinese railway use are commonly specified to TB/T 2626, the railway-industry standard for rubber rail pads, with material tests performed to the corresponding GB/T rubber test methods.

What does a pad type test include?

A typical type test covers static and dynamic stiffness, damping, repeated-load behaviour and electrical resistance at system level, plus material tests such as tensile strength, elongation at break, Shore hardness and compression set, all reported against the applicable standard.

Can one pad fit both UIC54 and UIC60 rails?

No. UIC54 (54E1) has a base width of about 140 mm while UIC60 (60E1) has a base width of about 150 mm. Pads are profile-specific and must also match the shoulder geometry of the fastening system.

Do E-clip systems and studded fastening systems use the same pad?

Not necessarily. The pad outline must fit the clip and shoulder footprint of each system, and the stiffness class is tuned to the system design. Always verify the pad drawing against the fastening system drawing before ordering.

What documentation should a buyer request?

Request the pad drawing with tolerances, batch material certificates, type-test reports for stiffness, fatigue and insulation, and, where the contract requires it, third-party laboratory test results.