Scope
UIC 519
Railway Wheelset Equivalent Conicity Determination
This test method specifies procedures for determining the equivalent conicity of railway wheelsets, a critical parameter governing vehicle stability and steering behavior on curves. Conicity describes the geometric relationship between wheel profiles and rail geometry, affecting how vehicles negotiate curves and respond to track irregularities. The measurement is essential for wheelset manufacturers, vehicle designers, and track maintenance specialists to ensure stable, safe operation and minimize wear and derailment risk. Accredited testing provides objective verification that wheelsets meet design specifications and regulatory requirements for dynamic safety.
What it measures
- Wheel profile geometry and taper angles
- Equivalent conicity value (λ)
- Wheelset geometric parameters and deviation
- Contact point position relative to wheel center
- Stability characteristics and steering forces
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DIN EN 13262
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BS EN 13262
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NF EN 13262
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UNI EN 13262
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UNE EN 13262
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NEN EN 13262
1,632
Accredited labs
19
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Moorcroft Controls
Active
DC CURRENT
Gas pressure (gauge)
ELECTRICAL
DC VOLTAGE
Measurement
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NSF Wales Limited
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BS EN ISO 7686:2005
DIN EN 997
DIN EN 13079
DIN ISO 10381-7
DIN EN 14622
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Nature’s Consultancy
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(HSG 248) – 2021
(PCM) based on HSG 248
DOC/002 based on HSG 248)
Normec DETS
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BS 1377: Part 2: 1990
DIN EN 12457
No DETSC 5012 based on BS EN
staining based on HSG 248.
(HSG 248) – 2021
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North Star Environmental
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(HSG 248) – 2021
NSDOC 47 based on HSG 248
staining based on HSG 248.
(PCM) based on HSG 248
Not One Iota
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(HSG 248) – 2021
SOP-12, based on HSG 248
staining based on HSG 248
(PCM) based on HSG 248
Nuclear Restoration Services
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AIR KERMA RATE
AMBIENT DOSE
HBs-Antigen (Hepatitis B-Surface
RESPONSE:
PERSONEL DOSE
O.C. Consulting (UK)
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(HSG 264, 2012)
Appendix 5 of HSG 227 (2004)
(HSG 248) – 2021
(PCM) based on HSG 248
IEC 61400-23
ASTM G73 (2012)
IEC 60885-3, 2.4.1
IEC 60502-2
IEC 60840
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One Scientific
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ISO 6888-1
ISO 21528-2
BS ISO 4832:2006
ISO 4833-1
ISO 6579-1
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Optical Test & Calibration
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DC Resistance
DC CURRENT
DC VOLTAGE
DC RESISTANCE (cont’d)
PHH Environmental (UK)
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HSG 227 (2004))
(HSG 264, 2012)
HSG 264 (2012) and Appx. 3 of
(HSG 248) – 2021
(PCM) based on HSG 248
Paragon Scientific
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Refractive Index
Capillary Viscometer Calibration
2.92 mm systems (continued)
Liquids
Density in Air at 20
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Particle Technology
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MIL-STD 810D, Method 510.2
MIL-STD 810E, Method 510.3
MIL-STD 810G:2008 Method 501.5
MIL-STD 810F, Method 510.4
MIL-STD-810H, Method 510.7
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Pennington Choices
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(HSG 264, 2012)
and Appx. 3 of HSG 227 (2004))
Executive guides HSG 264 (2012)
Perry Analytical
Active
(HSG 248) – 2021
(PCM) based on HSG 248
Manual based on HSG 248
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