SIST EN 15612:2009
Railway applications - Braking - Brake pipe accelerator valve
Railway applications - Braking - Brake pipe accelerator valve
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, testing and manufacture of brake pipe accelerator valves.
Bahnanwendungen - Bremse - Schnellbremsbeschleunigungsventil
Diese Europäische Norm (prEN 15612:2006) gilt für Schnellbremsbeschleunigungsventile zur Entlüftung der Bremsleitung von Eisenbahnfahrzeugen bei Auslösen einer Notbremsung ohne Berücksichtigung der Fahrzeugart oder Spurweite.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.
In dieser Europäischen Norm sind die Anforderungen für die Konstruktion, die Prüfung und Herstellung von Schnellbremsbeschleunigungsventilen niedergelegt.
Applications ferroviaires - Freinage - Valve accélératrice de vidange
La présente Norme européenne s’applique aux valves accélératrices de vidange conçues pour purger la conduite de frein de véhicules ferroviaires lors d’un freinage d’urgence, indépendamment du type de véhicules ou de l’écartement de la voie.
La présente Norme européenne spécifie les exigences relatives à la conception, à la fabrication et aux essais des valves accélératrices de vidange.
Železniške naprave - Zavore - Pospešilnik praznjenja glavnega zavornega voda
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Železniške naprave - Zavore - Pospešilnik praznjenja glavnega zavornega vodaBahnanwendungen - Bremse - SchnellbremsbeschleunigungsventilRailway applications - Braking - Brake pipe accelerator valve45.040Materiali in deli za železniško tehnikoMaterials and components for railway engineeringICS:Ta slovenski standard je istoveten z:EN 15612:2008SIST EN 15612:2009en,fr01-januar-2009SIST EN 15612:2009SLOVENSKI
STANDARD
SIST EN 15612:2009
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15612November 2008ICS 45.060.01 English VersionRailway applications - Braking - Brake pipe accelerator valveApplications ferroviaires - Freinage - Valve accélératrice devidangeBahnanwendungen - Bremse -SchnellbremsbeschleunigungsventilThis European Standard was approved by CEN on 27 September 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15612:2008: ESIST EN 15612:2009
EN 15612:2008 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.4 4 Design and manufacture.5 4.1 General.5 4.2 Functional requirements.5 4.3 Vibration and shocks requirements.7 4.4 Environment requirements.7 4.5 Compressed air quality.10 4.6 Service life.10 4.7 Fire behaviour.10 4.8 External appearance.10 4.9 Design requirements regarding pressure stress.10 4.10 Interfaces.11 5 Materials.11 6 Type tests.11 6.1 General.11 6.2 Individual brake pipe accelerator tests.11 6.3 Simulated train consist tests.17 7 Routine test and inspection.19 8 Documentation.19 9 Designation.20 10 Identification and marking.20 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 96/48/EC, as modified by Directive 2004/50/EC.21 Annex ZB (informative)
Relationship between this
European
Standard and the Essential Requirements
of EU Directive 2001/16/EC of the European Parliament and of the Council of 19 March 2001 on the interoperability of the trans-European conventional rail system, as modified by EU Directive 2004/50/EC of 29 April 2004.22 Bibliography.23
SIST EN 15612:2009
EN 15612:2008 (E) 3 Foreword This document (EN 15612:2008) has been prepared by Technical Committee CEN/TC 256 “Railway applications”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2009, and conflicting national standards shall be withdrawn at the latest by May 2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This European Standard has been prepared under a mandate given to CEN/CENELEC/ETSI by the European Commission and the European Free Trade Association and supports essential requirements of EU Directive 96/48 and EU Directive 2001/16, as modified by EU Directive 2004/50. For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 15612:2009
EN 15612:2008 (E) 4 1 Scope 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. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 14478:2005, Railway applications – Braking – Generic vocabulary EN 14601, Railway applications – Straight and angled end cocks for brake pipe and main reservoir pipe EN 15355, Railway applications – Braking - Distributor valves and distributor-isolating devices EN 50125-1, Railway applications – Environmental conditions for equipment – Part 1: Equipment on board rolling stock EN 60721-3-5:1997, Classification of environmental conditions – Part 3: Classification of groups of environmental parameters and their severities – Section 5: Ground vehicle installations (IEC 60721-3-5:1997) EN 61373:1999, Railway applications – Rolling stock equipment – Shock and vibration tests (IEC 61373:1999) EN ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads – Part 1: Dimensions, tolerances and designation (ISO 228-1:2000) ISO 8573-1:2001, Compressed air – Part 1: Contaminants and purity classes 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14478:2005 and the following apply. 3.1 brake pipe accelerator valve device connected to the brake pipe of a vehicle, which operates in response to seeing a rapid fall in brake pipe pressure to ensure a continuing rapid fall to below 2,5 bar 3.2 braking mode “goods ” braking mode “freight” braking mode “G" braking mode characterized by slow brake application and release times specific for distributor valves used on freight trains for slow speed 3.3 braking mode “passenger” braking mode “P” braking mode characterized by fast brake application and release times specific for distributor valves used on trains for passenger traffic SIST EN 15612:2009
EN 15612:2008 (E) 5 3.4 normal litre Nl unit of mass for gases equal to the mass of 1 l at a pressure of 1,013 2 bar (one atmosphere) and at a standard temperature, often 0 °C or 20 °C NOTE Airflow is often stated in normal litres per minute (Nl/min). 3.5 operating pressure reference input pressure in full release position NOTE This is normally 5 bar brake pipe pressure but can be 4 bar or 6 bar. 3.6 quick service function function of a distributor valve which allows, when applying the brake from stand-by and released position, the local fast venting of brake pipe pressure by a certain specified amount and at a certain specified gradient, to provide pneumatic brake signal transmission through a train 3.7 quick service device device that fulfils the quick service function 3.8 emergency brake application brake pipe pressure fall seen at the accelerator valve as a result of a demand for an emergency brake application from any source 3.9 overcharge increase in brake pipe pressure above normal operating pressure 4 Design and manufacture 4.1 General The design and manufacture of the brake pipe accelerator valves shall take the requirements of this standard into account for all intended operating conditions. 4.2 Functional requirements 4.2.1 General Brake pipe accelerator valves shall be able to operate with all interoperable distributors and existing interoperable brake pipe accelerator valves. The brake pipe accelerator valve shall be ready to operate when the brake pipe has reached its operating (running) pressure. The brake pipe accelerator valve shall operate in response to a defined rapid fall of brake pipe pressure to ensure a continuing rapid fall to below 2,5 bar. 4.2.2 Operating requirements The following operating requirements are defined in relation to a 5 bar brake pipe operating (running) pressure. When an emergency brake application occurs, the brake pipe accelerator valves shall create a sufficiently rapid reduction in brake pipe pressure to ensure the rapid increase in brake cylinder pressure on every vehicle SIST EN 15612:2009
EN 15612:2008 (E) 6 in the train set. When the pressure in the brake pipe has fallen quickly to below 2,5 bar, and within no more than 4 s after the brake pipe accelerator valve commences operation, the brake pipe accelerator valve shall stop venting air in such a way that the brake pipe can rapidly be refilled. This requirement shall be proven by testing in accordance with 6.2.4.4.
No functional errors shall occur in the operation of the brake pipe accelerator valve at operating (running) pressures of (5 ± 1) bar. This requirement shall be proven by testing in accordance with 6.2.4.10. 4.2.3 Train/vehicle behaviour The brake pipe accelerator valve shall exhaust the air from the brake pipe without causing any adverse effect on vehicle/train behaviour. This requirement shall be proven by testing in accordance with 6.3. 4.2.4 Affect of overcharge 4.2.4.1 Overcharge after full service application The brake pipe accelerator valve shall not come into operation due to the effect of an operating pressure overcharge after a full service brake application, which allows a build up of brake pipe pressure above normal operating pressure to 6 bar. It shall be taken into account that this overcharge can be present for up to 40 s in braking mode “G” and 10 s in braking mode “P” after a full service application. This requirement shall be proven by testing in accordance with 6.2.4.8. 4.2.4.2 Overcharge starting from operating pressure The brake pipe accelerator valve shall not come into operation if the brake pipe pressure, starting from the operating pressure, is raised to 6 bar for 2 s, then is reduced to 5,2 bar in 1 s, followed by a return to the operating pressure at a rate of 0,15 bar in 60 s. This requirement shall be proven by testing in accordance with 6.2.4.9. 4.2.5 Affect of individual vehicle The operation of the brake pipe accelerator valve shall not be affected by an individual vehicle with a brake pipe volume not exceeding 25 l, where a brake pipe accelerator valve is not fitted or the brake has been isolated. This shall apply irrespective of the position of that vehicle in the train consist. This requirement shall be proven by testing in accordance with 6.3. 4.2.6 Subsequent emergency application The brake pipe accelerator valve shall come into operation when an emergency brake application is made after a full service brake application. This requirement shall be proven by testing in accordance with 6.2.4.7. 4.2.7 Sensitivity The brake pipe accelerator valve shall come into operation no later than 2 s after the pressure in the brake pipe, venting to atmosphere, has fallen from 5 bar to 3,2 bar within 3 s. This requirement shall be proven by testing in accordance with 6.2.4.4. 4.2.8 Insensitivity to brake pipe pressure fall The brake pipe accelerator valve shall not come into operation when the pressure in the brake pipe falls uniformly from 5 bar to 3,2 bar over 6 s with the distributor inoperative. Continuing the pressure fall down to 2,5 bar shall not cause the brake pipe accelerator valve to operate. This requirement shall be proven by testing in accordance with 6.2.4.5. SIST EN 15612:2009
EN 15612:2008 (E) 7 4.2.9 Insensitivity to distributor valve quick service device operation The brake pipe accelerator valve shall not operate during the initial stage of service braking due to operation of the distributor valve internal quick service device. This requirement shall be proven by testing in accordance with 6.2.4.6. 4.2.10 Isolation 4.2.10.1 If the brake pipe accelerator valve is incorporated in the distributor, it shall be inoperative after the distributor has been isolated. This requirement shall be proven by testing in accordance with EN 15355 as part of the distributor valve test. 4.2.10.2 If the brake pipe accelerator valve is fitted separately from the distributor it shall be possible to isolate the brake pipe accelerator valve from the brake pipe and vent its pressure, using a suitable valve or device in the pipework such that it can be sealed in the normal open position with the isolating handle in the vertical down position.
NOTE This requirement will be specified in the relevant vehicle system standard. 4.2.11 Leakage Leakage of the brake pipe accelerator valve shall be such that technical performance as specified by this standard is met without restrictions. The sealing arrangement within the brake pipe accelerator valve shall prevent loss of air as follows when considering a brake pipe operating pressure of 6 bar: At an environmental temperature of (20 ± 5) °C, the brake pipe accelerator valve shall not have a leakage rate of greater than 0,005 Nl/min. This requirement shall be proven by testing in accordance with 6.2.4.3. At – 25 °C ≤ environmental temperature < 15 °C, also at 25 °C < environmental temperature ≤ 70 °C, the brake pipe accelerator valve shall not have a leakage rate of greater than 0,01 Nl/min at the normal working pressures. This requirement shall be proven by testing in accordance with 6.2.5. At – 40 °C ≤ environmental temperature < – 25 °C, the brake pipe accelerator valve shall not have a leakage rate of greater than 0,1 Nl/min at normal working pressures. This requirement shall be proven by testing in accordance with 6.2.5. 4.3 Vibration and shocks requirements The brake pipe accelerator valve shall be able to operate without restriction under vibration and shock conditions as specified by EN 61373:1999, Category 1, Class A or B. This requirement shall be proven by testing in accordance with 6.2.4.11. 4.4 Environment requirements 4.4.1 General The design shall take into account that the brake pipe accelerator valve shall be able to be put into service and operate normally in the conditions and climatic zones for which it is intended to operate and in which it is likely to run, as specified in this standard. NOTE 1 The environmental conditions are expressed in classes for temperature, humidity etc. thereby giving the vehicle designer the choice of a brake pipe accelerator valve suitable for operation on a vehicle all over Europe, or have a restricted use. SIST EN 15612:2009
EN 15612:2008 (E) 8 NOTE 2 The environment range limits specified are those that have a low probability of being exceeded. All specified values are maximum or limit values. These values can be reached, but do not occur permanently. Depending on the situation there can be different frequencies of occurrence related to a certain period of time. NOTE 3 The environment requirements of this document cover the environment requirements of the HS RST TSI which only refers to EN 50125-1. The brake pipe accelerator valve shall be tested in accordance with requirements given in Clause 6 of this standard including where required environmental/climatic testing. 4.4.2 Temperature Brake pipe accelerator valves covered by this standard shall be able to operate:
at – 25 °C ≤ environmental temperature ≤
70 °C, without any deviation from the technical requirements specified in Clause 4 in this standard; at – 40 °C ≤ environmental temperature < – 25 °C, with allowed deviation from the technical requirements specified in this standard but without affecting the function of the brake pipe accelerator valve. Deviations from the technical requirements when testing at extremes are defined in 6.2.5. The purchaser can specify higher or lower extreme temperature limit values if operational constraints demand it. In this case the temperature limit values used in the extreme temperature tests in 6.2.5 shall be changed accordingly. 4.4.3 Other environmental conditions 4.4.3.1 General The following environmental conditions shall be considered in the design of the brake pipe accelerator valve. It shall be demonstrated that these environmental conditions have been taken into account in the design of the brake pipe accelerator valve. It is sufficient for the supplier to make a declaration of conformity stating how the environmental conditions in the following clauses have been taken into account. If not specifically required to be tested as part of the type testing requirements in Clause 6 of this standard, suitable tests and/or design assessments considering the effect of the following environmental conditions on the brake pipe accelerator valve, shall be used in the development/design proving of the brake pipe accelerator valve, prior to type testing. 4.4.3.2 Altitude The brake pipe accelerator valve shall be able to operate without restrictions up to an altitude of 2 000 m. 4.4.3.3 Humidity The following external humidity levels shall be considered: yearly average: ≤ 75 % relative humidity;
on 30 days in the year continuously: between 75 % and 95 % relative humidity; on the other days occasionally: between 95 % and 100 % relative humidity; maximum absolute humidity: 30 g/m3 occurring in tunnels. SIST EN 15612:2009
EN 15612:2008 (E) 9 An operationally caused infrequent and slight moisture condensation shall not lead to any malfunction or failure. The psychometric charts contained in EN 50125-1 shall be used to establish the range of variation of the relative humidity for the different temperature classes that it is considered will not be exceeded for more than 30 days per year. At cooled surfaces, 100 % relative humidity can occur causing condensation on parts of equipment; this shall not lead to any malfunction or failure. Sudden changes of the air temperature local to the vehicle can cause condensation of water on parts of equipment with rate of 3 K/s and maximum variation of 40 K; these conditions particularly occurring when entering or leaving a tunnel shall not lead to any malfunction or failure of the equipment. 4.4.3.4 Rain Rain rate of 6 mm/min shall be taken into account. The effect of rain shall be considered depending on the possible equipment installation together with wind and vehicle movement. 4.4.3.5 Snow, ice and hail Consideration shall be given to the effect of all kinds of snow, ice and/or hail. The maximum diameter of hailstones shall be taken as 15 mm, larger diameters can occur exceptionally. The effect of snow, ice and hail shall be considered depending on the equipment installation together with wind and vehicle movement. 4.4.3.6 Solar radiation Equipment design shall allow for direct exposure to solar radiation at the rate of 1 120 W/m2 for a maximum duration of 8 h. 4.4.3.7 Pollution The effects of pollution shall be considered in the design of equipment and components. Means may be provided to reduce pollution by the effective use of protection of the brake pipe accelerator valve. The severity of pollution can depend upon the location of the equipment on the vehicle, therefore the effects of the kinds of pollution indicated in Table 1 shall be considered as a minimum. Table 1 — Pollution Pollution Class to be considered Chemically active substances Class 5C2 of EN 60721-3-5:1997 Contaminating fluids Class 5F2 (electrical engine) of EN 60721-3-5:1997 Class 5F3 (thermal engine) of EN 60721-3-5:1997 Biologically active substances Class 5B2 of EN 60721-3-5:1997 Dust Class 5S2 of EN 60721-3-5:1997 Stones and other objects Ballast and other objects of maximum 15 mm diameter Sand Class 5S2 of EN 60721-3-5:1997 Sea spray Class 5C2 of EN 60721-3-5:1997
SIST EN 15612:2009
EN 15612:2008 (E) 10 4.5 Compressed air quality It shall be possible to operate the brake pipe accelerator valve without restrictions with at least the compressed air quality according to the following classes defined by ISO 8573-1:2001: class 4 – for the maximum particle size and the maximum concentration of solid contaminants; class 4 – for the water dew point; class 4 – for the maximum total (droplets, aerosols and vapours) oil concentration. The brake pipe accelerator valve shall be capable of operating in an air supply system that is not fitted with an air dryer, or when the air dryer is out of order. The air system should therefore include some means of preventing water collecting within the brake pipe accelerator valve and hence freezing of the water in conditions below 0 °C. 4.6 Service life No specific requirements for the brake pipe accelerator valve to attain a particular service life are contained in this standard. Any testing to establish the service life of a brake pipe accelerator valve shall be conducted as part of the product development. NOTE The service life of the brake pipe accelerator valve is a function of the environment/operating conditions in which the brake pipe accelerator valve will function, and the requirements for the brake pipe accelerator valve to achieve a serviceable life in accordance with the maintenance requirements of the vehicle to which it is fitted. 4.7 Fire behaviour The materials used in the manufacture of the brake pipe accelerator valve shall prevent the emission of fumes or gases that are harmful and dangerous to the environment, particularly in the event of fire. The assembled brake pipe accelerator valve shall limit fire ignition, propagation and the production of smoke in the event of fire on primary ignition from a source of 7 kW for 3 min. 4.8 External appearance The dimensions and the co-ordinates and threads of the ports and fixing points of the brake pipe accelerator valve shall comply with the detail given by the relevant drawings. The design of the brake pipe accelerator valve shall ensure that the exterior surfaces of the brake pipe accelerator valve are free of sharp edges and corners that could be dangerous to those people handling the brake pipe accelerator valve or, when installed on a vehicle, working on adjacent equipment.
This requirement shall be checked in accordance with 6.2.4.2. 4.9 Design requirements regarding pressure stress The design of the brake pipe accelerator valve shall allow safe required performance with a maximum supply pressure of 10 bar. It shall be taken into consideration that the maximum supply pressure can be reached in other pneumatic circuits of the brake pipe accelerator valve when the present standard requires such a function. SIST EN 15612:2009
EN 15612:2008 (E) 11 4.10 Interfaces 4.10.1 General A brake pipe accelerator valve shall be capable of being installed on the vehicle in accordance with 4.10.2 and 4.10.3 or directly mounted to a distributor valve. 4.10.2 Mechanical The interface of the brake pipe accelerator valve to the vehicle shall be via a mounting bracket or manifold. The connectors shall be suitably sized to meet the physical loadings identified in this standard. The interface of the brake pipe accelerator valve with manifold or bracket is dependant on the individual design of the brake pipe accelerator valve. 4.10.3 Pneumatic The pneumatic interface with the vehicle pipework shall be via a suitable manifold/pipe connection such that removal of the brake pipe accelerator valve without disturbing the main brake pipe is possible. The pipe connections to the brake pipe shall be via a threaded connection of size G 1 or G 1 1/4 in accordance with EN ISO 228-1. 5 Materials The selection of the material and the manufacturing process shall comply with the requirements of this standard, technical specification and/or the relevant manufacturing drawings. 6 Type tests 6.1 General The following type tests shall be carried out: a) individual brake pipe accelerator tests (see 6.2); b) simulated train consist tests (see 6.3). All the test requirements shall be achieved to obtain type test compliance. 6.2 Individual brake pipe accelerator tests 6.2.1 Test bench for individual brake pipe accelerator tests The type tests shall be performed on a test bench specifically designed so that all the requirements given by this standard for the testing of the brake pipe accelerator valve can be confirmed. A diagram of the test bench that shall be used to show conformity of the brake pipe accelerator valve with the requirements of 4.2 is shown in Figure 1. This test bench arrangement or an equivalent may be used for both ambient and extreme temperature testing when used in association with a thermostatic enclosure. The dimensions and other characteristics of the test bench components shall be provided to ensure the performance of the test bench is in accordance with the requirements of this specification. This shall be verified to ensure that constructional elements of the test bench have not affected that performance. SIST EN 15612:2009
EN 15612:2008 (E) 12
Key
X brake pipe accelerator valve on test S pressure supply R1 pressure regulator A, B, C, D, E isolating cocks V1 brake pipe volume V2, V3 test volumes 1, 2, 3 pressure sensors/gauge T thermostatic enclosure for testing at extreme temperatures TP1, TP2, TP3, TP4 throttle ports BP brake pipe with an internal diameter of 1 " NOTE Examples of typical test bench equipment sizes are: V1: 8 l, V2: 0,645 l, V3: 0,155 l, tp1: Ø 4,5 mm, tp2: Ø 1,5 mm, tp3: Ø 1,9 mm, tp4: Ø 2,6 mm. a Shortest form of construction; the test assembly shall be as compact as possible in this area, distance between components shall be minimised, with no unnecessary piping. Figure 1 — Test bench for testing of leakage, function and operation at ambient and extreme temperatures The isolating cocks shall be situated at a place, that the pipe volume between isolating cocks A and E and the brake pipe accelerator valve is ≤ 200 cm³ including the pipework to and the measuring instrument itself. The test bench leakage shall not be greater than 0,001
...
SLOVENSKI STANDARD
kSIST prEN 15612:2008
Železniške naprave - Zavore - Pospešilnik praznjenja glavnega zavornega voda
Railway applications - Braking - Brake pipe accelerator valve
Bahnanwendungen - Bremse - Schnellbremsbeschleunigungsventil
Ta slovenski standard je istoveten z: prEN 15612
ICS:
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
kSIST prEN 15612:2008 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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kSIST prEN 15612:2008
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kSIST prEN 15612:2008
EUROPEAN STANDARD
FINAL DRAFT
prEN 15612
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2008
ICS 45.060.01
English Version
Railway applications - Braking - Brake pipe accelerator valve
Applications ferroviaires - Freinage - Valve accélératrice de Bahnanwendungen - Bremse -
vidange Schnellbremsbeschleunigungsventil
This draft European Standard is submitted to CEN members for formal vote. It has been drawn up by the Technical Committee CEN/TC
256.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15612:2008: E
worldwide for CEN national Members.
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kSIST prEN 15612:2008
prEN 15612:2008 (E)
Contents Page
Foreword.3
1 Scope .3
2 Normative references .3
3 Terms and definitions .4
4 Design and manufacture.5
4.1 General.5
4.2 Functional requirements.5
4.3 Vibration and shocks requirements.7
4.4 Environment requirements .7
4.5 Compressed air quality .9
4.6 Service life .9
4.7 Fire behaviour .9
4.8 External appearance.10
4.9 Design requirements regarding pressure stress .10
4.10 Interfaces .10
5 Materials .10
6 Type tests .10
6.1 General.10
6.2 Individual brake pipe accelerator tests .11
6.3 Simulated train consist tests.17
7 Routine test and inspection.19
8 Documentation.19
9 Designation .20
10 Identification and marking .20
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 96/48/EC, as modified by Directive 2004/50/EC .21
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2001/16/EC of the European Parliament and of the Council
of 19 March 2001 on the interoperability of the trans-European conventional rail system,
as modified by EU Directive 2004/50/EC of 29 April 2004 .22
Bibliography .23
2
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kSIST prEN 15612:2008
prEN 15612:2008 (E)
Foreword
This document (prEN 15612:2008) has been prepared by Technical Committee CEN/TC 256 “Railway
applications”, the secretariat of which is held by DIN.
This document is currently submitted to the Formal Vote.
This European Standard has been prepared under a mandate given to CEN/CENELEC/ETSI by the European
Commission and the European Free Trade Association to support Essential Requirements of EU Directive
96/48 and EU Directive 2001/16, as modified by EU Directive 2004/50.
For relationship with EU Directive(s), see informative Annexes ZA and ZB, which are integral parts of this
document.
1 Scope
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.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 14478:2005, Railway applications — Braking — Generic vocabulary
EN 14601, Railway applications - Straight and angled end cocks for brake pipe and main reservoir pipe
prEN 15355, Railway applications - Braking - Distributor valves and distributor-isolating devices
EN 50125-1, Railway applications — Environmental conditions for equipment — Part 1: Equipment on board
rolling stock
EN 60721-3-5:1997, Classification of environmental conditions — Part 3: Classification of groups of
environmental parameters and their severities — Section 5: Ground vehicle installations (IEC 60721-3-5:1997)
EN 61373:1999, Railway applications — Rolling stock equipment — Shock and vibration tests
(IEC 61373:1999)
EN ISO 228-1:2003, Pipe threads where pressure-tight joints are not made on the threads — Part 1:
Dimensions, tolerances and designation (ISO 228-1:2000)
ISO 8573-1:2001, Compressed air for general use — Part 1: Contaminants and quality classes
3
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kSIST prEN 15612:2008
prEN 15612:2008 (E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 14478:2005 and the following apply.
3.1
brake pipe accelerator valve
device connected to the brake pipe of a vehicle, which operates in response to seeing a rapid fall in brake
pipe pressure to ensure a continuing rapid fall to below 2,5 bar
3.2
braking mode “goods ”
braking mode “freight”
braking mode “G"
braking mode characterized by slow brake application and release times specific for distributor valves used on
freight trains for slow speed
3.3
braking mode “passenger”
braking mode “P”
braking mode characterized by fast brake application and release times specific for distributor valves used on
trains for passenger traffic
3.4
normal litre
Nl
unit of mass for gases equal to the mass of 1 l at a pressure of 1,013 2 bar (one atmosphere) and at a
standard temperature, often 0 °C or 20 °C
NOTE Airflow is often stated in normal litres per minute (Nl/min).
3.5
operating pressure
reference input pressure in full release position
NOTE This is normally 5 bar brake pipe pressure but can be 4 bar or 6 bar.
3.6
quick service function
function of a distributor valve which allows, when applying the brake from stand-by and released position, the
local fast venting of brake pipe pressure by a certain specified amount and at a certain specified gradient, to
provide pneumatic brake signal transmission through a train
3.7
quick service device
device that fulfils the quick service function
3.8
emergency brake application
brake pipe pressure fall seen at the accelerator valve as a result of a demand for an emergency brake
application from any source
3.9
overcharge
increase in brake pipe pressure above normal operating pressure
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prEN 15612:2008 (E)
4 Design and manufacture
4.1 General
The design and manufacture of the brake pipe accelerator valves shall take the requirements of this standard
into account for all intended operating conditions.
4.2 Functional requirements
4.2.1 General
Brake pipe accelerator valves shall be able to operate with all interoperable distributors and existing
interoperable brake pipe accelerator valves.
The brake pipe accelerator valve shall be ready to operate when the brake pipe has reached its operating
(running) pressure. The brake pipe accelerator valve shall operate in response to a defined rapid fall of brake
pipe pressure to ensure a continuing rapid fall to below 2,5 bar.
4.2.2 Operating requirements
The following operating requirements are defined in relation to a 5 bar brake pipe operating (running) pressure.
When an emergency brake application occurs, the brake pipe accelerator valves shall create a sufficiently
rapid reduction in brake pipe pressure to ensure the rapid increase in brake cylinder pressure on every vehicle
in the train set. When the pressure in the brake pipe has fallen quickly to below 2,5 bar, and within no more
than 4 s after the brake pipe accelerator valve commences operation, the brake pipe accelerator valve shall
stop venting air in such a way that the brake pipe can rapidly be refilled. This requirement shall be proven by
testing in accordance with 6.2.4.4.
No functional errors shall occur in the operation of the brake pipe accelerator valve at operating (running)
pressures of (5 ± 1) bar. This requirement shall be proven by testing in accordance with 6.2.4.10.
4.2.3 Train/vehicle behaviour
The brake pipe accelerator valve shall exhaust the air from the brake pipe without causing any adverse effect
on vehicle/train behaviour. This requirement shall be proven by testing in accordance with 6.3.
4.2.4 Affect of overcharge
4.2.4.1 Overcharge after full service application
The brake pipe accelerator valve shall not come into operation due to the effect of an operating pressure
overcharge after a full service brake application, which allows a build up of brake pipe pressure above normal
operating pressure to 6 bar. It shall be taken into account that this overcharge can be present for up to 40 s in
braking mode “G” and 10 s in braking mode “P” after a full service application. This requirement shall be
proven by testing in accordance with 6.2.4.8.
4.2.4.2 Overcharge starting from operating pressure
The brake pipe accelerator valve shall not come into operation if the brake pipe pressure, starting from the
operating pressure, is raised to 6 bar for 2 s, then is reduced to 5,2 bar in 1 s, followed by a return to the
operating pressure at a rate of 0,15 bar in 60 s. This requirement shall be proven by testing in accordance
with 6.2.4.9.
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prEN 15612:2008 (E)
4.2.5 Affect of individual vehicle
The operation of the brake pipe accelerator valve shall not be affected by an individual vehicle with a brake
pipe volume not exceeding 25 l, where a brake pipe accelerator valve is not fitted or the brake has been
isolated. This shall apply irrespective of the position of that vehicle in the train consist. This requirement shall
be proven by testing in accordance with 6.3.
4.2.6 Subsequent emergency application
The brake pipe accelerator valve shall come into operation when an emergency brake application is made
after a full service brake application. This requirement shall be proven by testing in accordance with 6.2.4.7.
4.2.7 Sensitivity
The brake pipe accelerator valve shall come into operation no later than 2 s after the pressure in the brake
pipe, venting to atmosphere, has fallen from 5 bar to 3,2 bar within 3 s. This requirement shall be proven by
testing in accordance with 6.2.4.4.
4.2.8 Insensitivity to brake pipe pressure fall
The brake pipe accelerator valve shall not come into operation when the pressure in the brake pipe falls
uniformly from 5 bar to 3,2 bar over 6 s with the distributor inoperative. Continuing the pressure fall down to
2,5 bar shall not cause the brake pipe accelerator valve to operate. This requirement shall be proven by
testing in accordance with 6.2.4.5.
4.2.9 Insensitivity to distributor valve quick service device operation
The brake pipe accelerator valve shall not operate during the initial stage of service braking due to operation
of the distributor valve internal quick service device. This requirement shall be proven by testing in accordance
with 6.2.4.6.
4.2.10 Isolation
4.2.10.1 If the brake pipe accelerator valve is incorporated in the distributor, it shall be inoperative after the
distributor has been isolated. This requirement shall be proven by testing in accordance with prEN 15355 as
part of the distributor valve test.
4.2.10.2 If the brake pipe accelerator valve is fitted separately from the distributor it shall be possible to
isolate the brake pipe accelerator valve from the brake pipe and vent its pressure, using a suitable valve or
device in the pipework such that it can be sealed in the normal open position with the isolating handle in the
vertical down position.
NOTE This requirement will be specified in the relevant vehicle system standard.
4.2.11 Leakage
Leakage of the brake pipe accelerator valve shall be such that technical performance as specified by this
standard is met without restrictions.
The sealing arrangement within the brake pipe accelerator valve shall prevent loss of air as follows when
considering a brake pipe operating pressure of 6 bar:
At an environmental temperature of (20 ± 5) °C, the brake pipe accelerator valve shall not have a leakage
rate of greater than 0,005 Nl/min. This requirement shall be proven by testing in accordance with 6.2.4.3.
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prEN 15612:2008 (E)
At – 25 °C ≤ environmental temperature < 15 °C, also at 25 °C < environmental temperature ≤ 70 °C, the
brake pipe accelerator valve shall not have a leakage rate of greater than 0,01 Nl/min at the normal
working pressures. This requirement shall be proven by testing in accordance with 6.2.5.
At – 40 °C ≤ environmental temperature < – 25 °C, the brake pipe accelerator valve shall not have a
leakage rate of greater than 0,1 Nl/min at normal working pressures. This requirement shall be proven by
testing in accordance with 6.2.5.
4.3 Vibration and shocks requirements
The brake pipe accelerator valve shall be able to operate without restriction under vibration and shock
conditions as specified by EN 61373:1999, Category 1, Class A or B. This requirement shall be proven by
testing in accordance with 6.2.4.11.
4.4 Environment requirements
4.4.1 General
The design shall take into account that the brake pipe accelerator valve shall be able to be put into service
and operate normally in the conditions and climatic zones for which it is intended to operate and in which it is
likely to run, as specified in this standard.
NOTE 1 The environmental conditions are expressed in classes for temperature, humidity etc. thereby giving the
vehicle designer the choice of a brake pipe accelerator valve suitable for operation on a vehicle all over Europe, or have a
restricted use.
NOTE 2 The environment range limits specified are those that have a low probability of being exceeded. All specified
values are maximum or limit values. These values can be reached, but do not occur permanently. Depending on the
situation there can be different frequencies of occurrence related to a certain period of time.
NOTE 3 The environment requirements of this document cover the environment requirements of the HS RST TSI
which only refers to EN 50125-1.
The brake pipe accelerator valve shall be tested in accordance with requirements given in Clause 6 of this
standard including where required environmental/climatic testing.
4.4.2 Temperature
Brake pipe accelerator valves covered by this standard shall be able to operate:
at – 25 °C ≤ environmental temperature ≤ 70 °C, without any deviation from the technical requirements
specified in Clause 4 in this standard;
at – 40 °C ≤ environmental temperature < – 25 °C, with allowed deviation from the technical requirements
specified in this standard but without affecting the function of the brake pipe accelerator valve.
Deviations from the technical requirements when testing at extremes are defined in 6.2.5.
The purchaser can specify higher or lower extreme temperature limit values if operational constraints demand
it. In this case the temperature limit values used in the extreme temperature tests in 6.2.5 shall be changed
accordingly.
4.4.3 Other environmental conditions
4.4.3.1 General
The following environmental conditions shall be considered in the design of the brake pipe accelerator valve.
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prEN 15612:2008 (E)
It shall be demonstrated that these environmental conditions have been taken into account in the design of the
brake pipe accelerator valve. It is sufficient for the supplier to make a declaration of conformity stating how the
environmental conditions in the following clauses have been taken into account.
If not specifically required to be tested as part of the type testing requirements in Clause 6 of this standard,
suitable tests and/or design assessments considering the effect of the following environmental conditions on
the brake pipe accelerator valve, shall be used in the development/design proving of the brake pipe
accelerator valve, prior to type testing.
4.4.3.2 Altitude
The brake pipe accelerator valve shall be able to operate without restrictions up to an altitude of 2 000 m.
4.4.3.3 Humidity
The following external humidity levels shall be considered:
yearly average: ≤ 75 % relative humidity;
on 30 days in the year continuously: between 75 % and 95 % relative humidity;
on the other days occasionally: between 95 % and 100 % relative humidity;
3
maximum absolute humidity: 30 g/m occurring in tunnels.
An operationally caused infrequent and slight moisture condensation shall not lead to any malfunction or
failure.
The psychometric charts contained in EN 50125-1 shall be used to establish the range of variation of the
relative humidity for the different temperature classes that it is considered will not be exceeded for more than
30 days per year.
At cooled surfaces, 100 % relative humidity can occur causing condensation on parts of equipment; this shall
not lead to any malfunction or failure.
Sudden changes of the air temperature local to the vehicle can cause condensation of water on parts of
equipment with rate of 3 K/s and maximum variation of 40 K; these conditions particularly occurring when
entering or leaving a tunnel shall not lead to any malfunction or failure of the equipment.
4.4.3.4 Rain
Rain rate of 6 mm/min shall be taken into account. The effect of rain shall be considered depending on the
possible equipment installation together with wind and vehicle movement.
4.4.3.5 Snow, ice and hail
Consideration shall be given to the effect of all kinds of snow, ice and/or hail. The maximum diameter of
hailstones shall be taken as 15 mm, larger diameters can occur exceptionally. The effect of snow, ice and hail
shall be considered depending on the equipment installation together with wind and vehicle movement.
4.4.3.6 Solar radiation
2
Equipment design shall allow for direct exposure to solar radiation at the rate of 1 120 W/m for a maximum
duration of 8 h.
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4.4.3.7 Pollution
The effects of pollution shall be considered in the design of equipment and components. Means may be
provided to reduce pollution by the effective use of protection of the brake pipe accelerator valve. The severity
of pollution can depend upon the location of the equipment on the vehicle therefore the effects of the kinds of
pollution indicated in Table 1 shall be considered as a minimum.
Table 1 — Pollution
Pollution Class to be considered
Chemically active substances Class 5C2 of EN 60721-3-5:1997
Class 5F2 (electrical engine) of EN 60721-3-5:1997
Contaminating fluids
Class 5F3 (thermal engine) of EN 60721-3-5:1997
Biologically active substances Class 5B2 of EN 60721-3-5:1997
Dust Class 5S2 of EN 60721-3-5:1997
Stones and other objects Ballast and other objects of maximum 15 mm diameter
Sand Class 5S2 of EN 60721-3-5:1997
Sea spray Class 5C2 of EN 60721-3-5:1997
4.5 Compressed air quality
It shall be possible to operate the brake pipe accelerator valve without restrictions with at least the
compressed air quality according to the following classes defined by ISO 8573-1:2001:
class 4 – for the maximum particle size and the maximum concentration of solid contaminants;
class 4 – for the water dew point;
class 4 – for the maximum total (droplets, aerosols and vapours) oil concentration.
The brake pipe accelerator valve shall be capable of operating in an air supply system that is not fitted with an
air dryer, or when the air dryer is out of order. The air system should therefore include some means of
preventing water collecting within the brake pipe accelerator valve and hence freezing of the water in
conditions below 0 °C.
4.6 Service life
No specific requirements for the brake pipe accelerator valve to attain a particular service life are contained in
this standard.
Any testing to establish the service life of a brake pipe accelerator valve shall be conducted as part of the
product development.
NOTE The service life of the brake pipe accelerator valve is a function of the environment/operating conditions in
which the brake pipe accelerator valve will function, and the requirements for the brake pipe accelerator valve to achieve a
serviceable life in accordance with the maintenance requirements of the vehicle to which it is fitted.
4.7 Fire behaviour
The materials used in the manufacture of the brake pipe accelerator valve shall prevent the emission of fumes
or gases that are harmful and dangerous to the environment, particularly in the event of fire.
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The assembled brake pipe accelerator valve shall limit fire ignition, propagation and the production of smoke
in the event of fire on primary ignition from a source of 7 kW for 3 min.
4.8 External appearance
The dimensions and the co-ordinates and threads of the ports and fixing points of the brake pipe accelerator
valve shall comply with the detail given by the relevant drawings.
The design of the brake pipe accelerator valve shall ensure that the exterior surfaces of the brake pipe
accelerator valve are free of sharp edges and corners that could be dangerous to those people handling the
brake pipe accelerator valve or, when installed on a vehicle, working on adjacent equipment.
This requirement shall be checked in accordance with 6.2.4.2.
4.9 Design requirements regarding pressure stress
The design of the brake pipe accelerator valve shall allow safe required performance with a maximum supply
pressure of 10 bar. It shall be taken into consideration that the maximum supply pressure can be reached in
other pneumatic circuits of the brake pipe accelerator valve when the present standard requires such a
function.
4.10 Interfaces
4.10.1 General
A brake pipe accelerator valve shall be capable of being installed on the vehicle in accordance with 4.10.2 and
4.10.3 or directly mounted to a distributor valve.
4.10.2 Mechanical
The interface of the brake pipe accelerator valve to the vehicle shall be via a mounting bracket or manifold.
The connectors shall be suitably sized to meet the physical loadings identified in this standard. The interface
of the brake pipe accelerator valve with manifold or bracket is dependant on the individual design of the brake
pipe accelerator valve.
4.10.3 Pneumatic
The pneumatic interface with the vehicle pipework shall be via a suitable manifold/pipe connection such that
removal of the brake pipe accelerator valve without disturbing the main brake pipe is possible. The pipe
connections to the brake pipe shall be via a threaded connection of size G 1 or G 1 1/4 in accordance with
EN ISO 228-1:2003.
5 Materials
The selection of the material and the manufacturing process shall comply with the requirements of this
standard, technical specification and/or the relevant manufacturing drawings.
6 Type tests
6.1 General
The following type tests shall be carried out:
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kSIST prEN 15612:2008
prEN 15612:2008 (E)
a) individual brake pipe accelerator tests (see 6.2);
b) simulated train consist tests (see 6.3).
All the test requirements shall be achieved to obtain type test compliance.
6.2 Individual brake pipe accelerator tests
6.2.1 Test bench for individual brake pipe accelerator tests
The type tests shall be performed on a test bench specifically designed so that all the requirements given by
this standard for the testing of the brake pipe accelerator valve can be confirmed.
A diagram of the test bench that shall be used to show conformity of the brake pipe accelerator valve with the
requirements of 4.2 is shown in Figure 1. This test bench arrangement or an equivalent may be used for both
ambient and extreme temperature testing when used in association with a thermostatic enclosure. The
dimensions and other characteristics of the test bench components shall be provided to ensure the
performance of the test bench is in accordance with the requirements of this specification. This shall be
verified to ensure that constructional elements of the test bench have not affected that performance.
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prEN 15612:2008 (E)
Key
X brake pipe accelerator valve on test
S pressure supply
R1 pressure regulator
A, B, C, D, E isolating cocks
V1 brake pipe volume
V2, V3 test volumes
1, 2, 3 pressure sensors/gauge
T thermostatic enclosure for testing at extreme temperatures
TP1, TP2, TP3, TP4 throttle ports
BP brake pipe with an internal diameter of 1 "
NOTE Examples of typical test bench equipment sizes are: V1: 8 l, V2: 0,645 l, V3: 0,155 l, tp1: Ø 4,5 mm,
tp2: Ø 1,5 mm, tp3: Ø 1
...
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