CEN/TC 256/SC 3/WG 24 - Components

This European Standard applies to automatic variable load sensing devices designed to continuously sense the load of a railway vehicle and provide a signal that can be used by a relay valve for the automatic variation of the air pressure used for brake application, thereby adjusting the brake force accordingly to achieve the required brake performance.
This European Standard specifies the requirements for the design, dimensions, manufacture and testing of automatic variable load sensing devices.

This European Standard is applicable to empty-loaded changeover devices designed to automatically sense when the load of a railway vehicle reaches a defined value (changeover mass), which represents the point at which the vehicle is classed as "loaded" and thereby requires the brake force to be adjusted accordingly to achieve the required brake performance. This European Standard also covers manually operated emptyloaded changeover devices and the associated changeover plates.
This European Standard specifies the requirements for the design, dimensions, manufacture and testing of empty-loaded changeover devices.

This European Standard applies to distributor valves and distributor-isolating devices.
The distributor valves contained in this European Standard are of graduated release type. Direct release types are not included.
Functionally they are regarded as not containing relay valves of any type, even if the relay valves are physically an integral part of the distributor valves.
This European Standard applies to both distributor-isolating devices mounted separate from the distributor valve and distributor-isolating devices integral with the distributor valve.
This European Standard specifies the requirements for the design, testing and quality assurance of distributor valves and distributor-isolating devices.
For interoperable freight wagons, these devices which are operated by compressed air according to EN 14198 are assessed according to the respective technical specification of interoperability.

This European Standard is applicable to brake pipe accelerator valves designed to vent the brake pipe of railway vehicles when an emergency brake application is initiated, without taking the type of vehicles and track-gauge into consideration.
This European Standard specifies the requirements for the design, manufacture and testing of brake pipe accelerator valves.

This European Standard applies to pneumatic half couplings designed to couple either the brake pipes or main reservoir pipes of railway vehicles, without taking the type of vehicles and track-gauge into consideration.
This European Standard gives the requirements for the design, dimensions, testing and quality assurance of pneumatic half couplings.

This European Standard applies to automatic variable load sensing devices designed to continuously sense the load of a railway vehicle and provide a signal that can be used by a relay valve for the automatic variation of the air pressure used for brake application, thereby adjusting the brake force accordingly to achieve the required brake performance.
This European Standard specifies the requirements for the design, dimensions, manufacture and testing of automatic variable load sensing devices.

This European Standard is applicable to empty-loaded changeover devices designed to automatically sense when the load of a railway vehicle reaches a defined value (changeover mass), which represents the point at which the vehicle is classed as “loaded” and thereby requires the brake force to be adjusted accordingly to achieve the required brake performance. This European Standard also covers manually operated empty-loaded changeover devices and the associated changeover plates.
This European Standard specifies the requirements for the design, dimensions, manufacture and testing of empty-loaded changeover devices.

This European Standard is applicable to brake pipe accelerator valves designed to vent the brake pipe of railway vehicles when an emergency brake application is initiated, without taking the type of vehicles and track-gauge into consideration.
This European Standard specifies the requirements for the design, manufacture and testing of brake pipe accelerator valves.

This European Standard is applicable to relay valves designed 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, and in response to a change in vehicle load that is either continuously variable or in two stages i.e. empty - loaded.
Relay valves operating with other pressures, in particular the brake pipe pressure, are not included.
This European Standard specifies the requirements for the design, manufacture and testing of relay valves.

This European Standard applies to distributor valves and distributor-isolating devices.
The distributor valves contained in this European Standard are of graduated release type. Direct release types are not included.
Functionally they are regarded as not containing relay valves of any type, even if the relay valves are physically an integral part of the distributor valves.
This European Standard applies to both distributor-isolating devices mounted separate from the distributor valve and distributor-isolating devices integral with the distributor valve.
This European Standard specifies the requirements for the design, testing and quality assurance of distributor valves and distributor-isolating devices.
For interoperable freight wagons, these devices which are operated by compressed air according to EN 14198 are assessed according to the respective technical specification of interoperability.

This European Standard specifies requirements for the design, dimensions, performance, and testing of the brake disc, hereafter called "disc". This European Standard applies to discs secured at the axle or drive-shaft of railway rolling stock by a cylindrical or conic tapered interference fit.
For each discrete unit so fitted, one or more disc brake rings, each having two axially separated friction faces, may be deployed.
This European Standard applies to discs designed to be fitted to rail vehicles used on the main national networks, urban networks, underground railways, trams and private networks (regional railways, company railways etc.).
NOTE   This European Standard should be used in association with the standards prEN 15328 and CEN/TC 256 N 185 covering disc brake linings.

This European Standard specifies the minimum criteria for system acceptance/type approval of a new wheel slide protection system and implementation of accepted WSP to specific vehicle applications and route requirements. This includes the design, testing and quality assessment of the WSP system and its components.
This European Standard is applicable to wheel slide protection systems for pneumatic braking systems without taking the type of vehicles and track-gauge into consideration. The general principles of this standard can also apply as a reference for other types of braking systems and other kinds of railway vehicles. The system is designed to control the sliding of wheels of railway vehicles during braking under degraded adhesion conditions to prevent wheel damage and to minimize the extension of the stopping distance under degraded adhesion conditions by optimizing the available adhesion between wheel and rail.
This European Standard does not apply to the following categories of vehicles:
1)   tramways;
2)   light railways;
3)   metros on steel wheels;
4)   metros on rubber tyred wheels.

This European Standard specifies the requirements for the design, dimensions, performance and testing of single/double brake indicators with or without electrical contacts. It applies to pneumatically operated brake indicators visible from the outside of the vehicle.
NOTE Brake indicators are for giving precise and accurate information about release and application of the brake.
This European Standard applies to brake indicators on railway vehicles used on the main national networks, urban networks, underground railways, trams and private networks (regional railways, company railways etc.).

This European Standard specifies the general requirements for the installation of the passenger alarm subsystem.
The passenger alarm subsystem is fitted to passenger trains used on national networks including trans-European high-speed and conventional interoperable rail systems.
The passenger alarm subsystem includes the passenger emergency brake system.
NOTE    The passenger emergency brake is sometimes shortened to emergency brake (esp. German: Notbremse) or passenger alarm (esp. English: alarm, French: alarme).
The passenger emergency brake can be operated in case of emergency brake demand by passengers or personnel in the train in order to stop the train.

This European Standard specifies the minimum criteria for system acceptance/type approval of a new wheel slide protection system and implementation of accepted WSP to specific vehicle applications and route requirements. This includes the design, testing and quality assessment of the WSP system and its components.
This European Standard is applicable to wheel slide protection systems for pneumatic braking systems without taking the type of vehicles and track-gauge into consideration. The general principles of this standard can also apply as a reference for other types of braking systems and other kinds of railway vehicles. The system is designed to control the sliding of wheels of railway vehicles during braking under degraded adhesion conditions to prevent wheel damage and to minimize the extension of the stopping distance under degraded adhesion conditions by optimizing the available adhesion between wheel and rail.
This European Standard does not apply to the following categories of vehicles:
1)   tramways;
2)   light railways;
3)   metros on steel wheels;
4)   metros on rubber tyred wheels.

This European Standard specifies the requirements for the design, dimensions, performance and testing of single/double brake indicators with or without electrical contacts. It applies to pneumatically operated brake indicators visible from the outside of the vehicle.
NOTE   Brake indicators are for giving precise and accurate information about release and application of the brake.
This European Standard applies to brake indicators on railway vehicles used on the main national networks, urban networks, underground railways, trams and private networks (regional railways, company railways etc.).

This European Standard specifies requirements for the design, dimensions, performance, and testing of the brake disc, hereafter called "disc". This European Standard applies to discs secured at the axle or drive-shaft of railway rolling stock by a cylindrical or conic tapered interference fit.
For each discrete unit so fitted, one or more disc brake rings, each having two axially separated friction faces, may be deployed.
This European Standard applies to discs designed to be fitted to rail vehicles used on the main national networks, urban networks, underground railways, trams and private networks (regional railways, company railways etc.).
NOTE   This European Standard should be used in association with the standards prEN 15328 and CEN/TC 256 N 185 covering disc brake linings.

This European Standard is applicable to relay valves designed 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, and in response to a change in vehicle load that is either continuously variable or in two stages i.e. empty - loaded.
Relay valves operating with other pressures, in particular the brake pipe pressure, are not included.
This European Standard specifies the requirements for the design, manufacture and testing of relay valves.

This European Standard is applicable to brake pipe accelerator valves designed to vent the brake pipe of railway vehicles when an emergency brake application is initiated, without taking the type of vehicles and track-gauge into consideration.
This European Standard specifies the requirements for the design, manufacture and testing of brake pipe accelerator valves.

This European Standard is applicable to empty-loaded changeover devices designed to automatically sense when the load of a railway vehicle reaches a defined value (changeover mass), which represents the point at which the vehicle is classed as “loaded” and thereby requires the brake force to be adjusted accordingly to achieve the required brake performance. This European Standard also covers manually operated empty-loaded changeover devices and the associated changeover plates.
This European Standard specifies the requirements for the design, dimensions, manufacture and testing of empty-loaded changeover devices.

This European Standard applies to automatic variable load sensing devices designed to continuously sense the load of a railway vehicle and provide a signal that can be used by a relay valve for the automatic variation of the air pressure used for brake application, thereby adjusting the brake force accordingly to achieve the required brake performance.
This European Standard specifies the requirements for the design, dimensions, manufacture and testing of automatic variable load sensing devices.

This European Standard applies to distributor valves and distributor-isolating devices.
The distributor valves contained in this European Standard are of graduated release type. Direct release types are not included.
Functionally they are regarded as not containing relay valves of any type, even if the relay valves are physically an integral part of the distributor valves.
This European Standard applies to both distributor-isolating devices mounted separate from the distributor valve and distributor-isolating devices integral with the distributor valve.
This European Standard specifies the requirements for the design, testing and quality assurance of distributor valves and distributor-isolating devices.
For interoperable freight wagons, these devices which are operated by compressed air according to EN 14198 are assessed according to the respective technical specification of interoperability.

This document is applicable to manually operated end cocks designed to cut-off the brake pipe and the main reservoir pipe of the air brake and compressed air system of rail vehicles; without taking the type of vehicles and track-gauge into consideration.
This document specifies requirements for the design, dimensions, testing and certification (qualification and/or homologation), and marking.