UIC 544-2

Railway Braking Force Estimation Methods

UIC 544-2 provides standardized calculation and estimation methods for determining braking force in railway rolling stock across different brake system types and operational scenarios. This technical standard defines mathematical models for translating brake system pressure, line force, and mechanical leverage into actual stopping power, accounting for variables such as wheel slip, temperature effects, and load conditions. The standard enables consistent performance prediction and certification across diverse European rail systems. Accreditation for this calculation methodology ensures reproducible, safety-critical engineering assessments used in rail fleet design and operational planning.

What it measures

  • Brake force calculation from system pressure and geometry
  • Adhesion coefficient effects on available braking force
  • Load-dependent braking force variations
  • Dynamic brake force response characteristics
  • Braking force distribution optimization
🇧🇪 NBN EN 14531-1 🇩🇪 DIN EN 14531-1 🇬🇧 BS EN 14531-1 🇫🇷 NF EN 14531-1 🇮🇹 UNI EN 14531-1 🇪🇸 UNE EN 14531-1 🇳🇱 NEN EN 14531-1
3,687 Accredited labs
21 Countries

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ABB

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ACCREDIA 00227 Dalmine, IT
DIN EN 62271-1 DIN EN 62271-102 DIN EN 62271-103 DIN EN 62271-200 IEC 61000-4-3: 2006 + 3 more
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BELAC 753-TEST Glabbeek, BE
NBN T96-102 HSG248 - appendix 2
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UKAS 4021 Rogerstone, GB
PRESSURE Hydraulic pressure (gauge) TEMPERATURE DC VOLTAGE INDUCTANCE + 3 more
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UKAS 4494 Southampton, GB
(HSG 248) – 2021 staining based on HSG 248 (PCM) based on HSG 248 QP23 based on HSG 248
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DAkkS D-PL-19436-01-01 Aalen, DE
DIN EN 932-1 DIN EN ISO 17892-4 DIN 19682-1 DIN 19682-2 DIN EN ISO 14688-2 + 3 more
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AC & MS

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UKAS 2742 Canvey Island, GB
(PCM) based on HSG 248 Analysts’ Guide (HSG 248)
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COFRAC 1-6001 Riorges, FR
DIN ISO 16000-4 DIN EN ISO 16017-2 NF X 43-262 NF X 43-257 NF X 43-267 + 3 more
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ACCREDIA 00156 Roma, IT
DIN EN 27888 DIN EN 13126-19 DIN EN 15408 DIN EN 14346 DIN EN 15935 + 3 more
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ACEL SERVICE

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ACCREDIA 00432 Langhirano, IT
ISO 18787 ISO 4831 ISO 4832 ISO 15214 ISO 21527-2 + 3 more
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ACEPE

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COFRAC 1-6133 Cherbourg-En-Cotentin, FR
NF X 43-050 NF X 43-269 NF ISO 22262-1 (parties utiles NF X 43-269 – ISO 16000-7 + 1 more
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ACM PHARMA

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COFRAC 1-7464 Bellegarde, FR
DIN EN ISO 16212 DIN EN ISO 18416 DIN EN ISO 21149 DIN EN ISO 11930 DIN EN ISO 11737-2 + 3 more
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ENAC LE026 Terrassa, ES
Sound power — engineering method using a Mechanical mounting of accelerometers (I Railway brake — anti-slide device (UIC 5 c.1772A>G rs11568367 ISO 3795 + 3 more
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ACONEX

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COFRAC 1-6332 Mont-Saint-Aignan, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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ACCREDIA 00548 Arzignano, IT
DIN EN 27888 DIN EN ISO 10523 DIN EN 14346 DIN EN 1484 DIN EN 12457-2 + 3 more
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ACQUE SPA

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ACCREDIA 01104 Empoli, IT
DIN EN ISO 10304-1 DIN EN ISO 17294-2 DIN EN ISO 10301 VDE 414-9-11 ISO 11731 + 3 more
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ACCREDIA 00308 Verona, IT
DIN EN ISO 10304-1 VDE 414-9-11 ISO 11731 DIN EN ISO 16266-2 DIN EN ISO 14403-2 + 3 more
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UKAS 0144 Glasgow, GB
(HSG 264, 2012) HSG 227 (2004) (HSG 248) – 2021 (PCM) based on HSG 248
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COFRAC 1-5574 Bourg-En-Bresse, FR
ISO 13299 ISO 4120 NF V 09-500
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ACCREDIA 00184 Cordenons, IT
DIN EN 1794-3 DIN EN 13126-19 DIN EN 303-5 DIN EN 13657 DIN EN 14346 + 3 more
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RvA I390 Heerlen, NL
NEN-EN 15567-1
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ENAC LE751 Gandia, ES
Environmental noise — determination of s ISO 2631-2 DIN EN ISO 1628-3 UNE-EN ISO 16283-1 UNE-EN ISO 16283-2 + 3 more
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COFRAC 1-5606 Brussieu, FR
DIN 51750-3 DIN EN 15002 ISO 22262-1 NF X 43-050 NF X 43-269 + 3 more
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COFRAC 1-6680 Hrabakova 1861/1 | 702 00 Moravska Ostrava A Privoz | Republique Tcheque, CZ
NF X43-050 (parties utiles de la norme) NF X43-050 (useful parts of the standard NF X43-050 (useful parts of the standard NF X43-050 (parties utiles de la norme) ISO 16000-7
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ADC

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COFRAC 1-6862 Mont-De-Marsan, FR
NF X 43-050 NF X 43-269 ISO 16000-7 FD X 46-033
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ADESUD

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ACCREDIA 00557 Battipaglia, IT
ISO 4832 ISO 21527-1 DIN ISO 16649-2 DIN EN ISO 18593 BS EN 15662 + 3 more
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Industries

Railway rolling stock engineering and design Brake system manufacturers and integrators Railway fleet operators Rail vehicle certification authorities Transport safety and compliance consulting

Related Standards

  • UIC 544-1 Railway brakes — Braking performance
  • UIC 541-01 Railway brakes — Brake pads — Part 1: Friction material specification
  • EN 14531-1 Railway applications — Safety requirements for the design of rolling stock

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