Järnvägsteknik

Kommittébeteckning: SIS/TK 254 (Järnvägar)
Källa: CEN
Svarsdatum: den 16 aug 2018
Se merSe mindre
 

This European Standard specifies the characteristics of wheelsets for all track gauges.

This standard can also apply to light rail and tramway applications.

This standard is applicable to wheelsets comprising elements that conform to the following European Standards:

— EN 13262 for wheels;

— EN 13261 for axles.

Some characteristics are given as a function of a category 1 or of a category 2. Category 2 can be divided into sub-categories (2a and 2b) to specify certain characteristics.

2a) vmax ≤ 120 km/h

2b) 120 < vmax ≤ 200 km/h

Category 1 is generally chosen when the operating speed exceeds 200 km/h. The wheelset then comprises wheels and axle of category 1 as specified in EN 13262 for the wheels and EN 13261 for the axles.

Kommittébeteckning: SIS/TK 254 (Järnvägar)
Källa: CEN
Svarsdatum: den 16 aug 2018
Se merSe mindre
 

This European Standard specifies the characteristics of axles for use for all track gauges.

This standard can also apply to light rail and tramway applications.

It defines characteristics of forged or rolled solid and hollow axles, made from vacuum-degassed steel grade EA1N1), EA1T1) and EA4T1). For hollow axles, this standard applies only to those that are manufactured by machining of a hole in a forged or rolled solid axle.

Two categories of axle are defined, category 1 and category 2. Generally, category 1 is chosen when the operational speed is higher than 200 km/h.

This standard is applicable to axles that are designed in accordance with the requirements of EN 13103-1.

This standard also permits variations of the material characteristics linked to alternative manufacturing processes (e.g. cold rolling, shot peening, thermal spraying, steel cleanliness, reduction ratio, improved material properties from melting and heat treatment process, etc.).

Kommittébeteckning: SIS/TK 254 (Järnvägar)
Källa: CEN
Svarsdatum: den 16 aug 2018
Se merSe mindre
 

This European Standard specifies the characteristics of railway wheels for all track gauges.

This standard can also apply to light rail and tramway applications.

Five steel grades, ER6, ER7, ER8, ERS8 and ER9 are defined in this standard.

NOTE ERS8 has been integrated in this standard as an optimization of steel grades ER8 and ER9 in the context of RCF, and by taking into account European service experience e.g. BS 5892-3 in the UK.

Certain characteristics are defined according to a category 1 or a category 2. Category 1 is generally chosen when the operation train speed is higher than 200 km/h. Vehicles running at speeds lower than or equal to 200 km/h generally use wheels of category 2.

These categories can sometimes be subdivided, depending upon the characteristics.

This standard is applicable to solid forged and rolled wheels which are made from vacuum degassed steel and have a chilled rim. They are to have already been used in commercial conditions on a European network in a significant quantity, or to have satisfied a technical approval procedure according to EN 13979-1 for their design.

Annex A describes the assessment process for acceptance of new materials not cited in this standard.

The standard defines the wheel product requirements; the technical approval procedure is not within the scope of this standard.

NOTE Rim-chilled describes heat treatment of the rim, the aim of which is to harden the rim and to create compressive residual stresses in the rim.

Kommittébeteckning: SIS/TK 254 (Järnvägar)
Källa: CEN
Svarsdatum: den 12 okt 2018
Se merSe mindre
 

This document is applicable to relay valves designated to control the brake cylinder pressure of compressed air brakes fitted to railway vehicles, in association with an air brake distributor valve or other control device. It covers one stage relay valves and relay valves adjusting the brake cylinder pressure in response to a change in vehicle speed or load that is either continuously variable or in two or more stages, i.e. empty – loaded.

Relay valves operating with other pressures, in particular the brake pipe pressure, are not included.

This document specifies the requirements for the design, manufacture and testing of relay valves.