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, manufacture and testing of brake pipe accelerator valves.

Bahnanwendungen - Bremse - Schnellbremsbeschleunigungsventil

Diese Europäische Norm gilt für Schnellbremsbeschleunigungsventile, die nachfolgend Schnellbremsbeschleuniger
genannt werden und zur Entlüftung der Hauptluftleitung von Eisenbahnfahrzeugen bei Auslösen
einer Schnellbremsung ohne Berücksichtigung der Fahrzeugart oder Spurweite.
Diese Europäische Norm legt die Anforderungen für die Konstruktion, die Herstellung und Prüfung von
Schnellbremsbeschleunigern fest.

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

Ta evropski standard velja za pospešilnike praznjenja glavnega zavornega voda, načrtovane za prezračevanje zavornega voda železniških vozil, kadar je sprožena uporaba zasilne zavore, ne da bi se upoštevala vrsta vozila in profil tira.
Ta evropski standard določa zahteve za načrtovanje, proizvodnjo in preskušanje pospešilnikov praznjenja glavnega zavornega voda.

General Information

Status
Withdrawn
Publication Date
07-Apr-2011
Withdrawal Date
01-Jul-2020
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
02-Jul-2020
Due Date
25-Jul-2020
Completion Date
02-Jul-2020

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Železniške naprave - Zavore - Pospešilnik praznjenja glavnega zavornega vodaBahnanwendungen - Bremse - SchnellbremsbeschleunigungsventilApplications ferroviaires - Freinage - Valve accélératrice de vidangeRailway applications - Braking - Brake pipe accelerator valve45.040Materiali in deli za železniško tehnikoMaterials and components for railway engineeringICS:Ta slovenski standard je istoveten z:EN 15612:2008+A1:2010SIST EN 15612:2009+A1:2011en,fr,de01-maj-2011SIST EN 15612:2009+A1:2011SLOVENSKI
STANDARD



SIST EN 15612:2009+A1:2011



EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15612:2008+A1
October 2010 ICS 45.060.01 Supersedes EN 15612:2008English Version
Railway applications - Braking - Brake pipe accelerator valve
Applications ferroviaires - Freinage - Valve accélératrice de vidange
Bahnanwendungen - Bremse - Schnellbremsbeschleunigungsventil This European Standard was approved by CEN on 27 September 2008 and includes Amendment 1 approved by CEN on 30 August 2010.
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. Up-to-date lists and bibliographical references concerning such national standards 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 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, Croatia, 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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15612:2008+A1:2010: ESIST EN 15612:2009+A1:2011



EN 15612:2008+A1:2010 (E) 2 Contents Page Foreword .41Scope .52Normative references .53Terms and definitions .54Design and manufacture .64.1General .64.2Functional requirements .64.2.1General .64.2.2Operating requirements .74.2.3Train/vehicle behaviour .74.2.4Affect of overcharge .74.2.5Affect of individual vehicle .74.2.6Subsequent emergency application .74.2.7Sensitivity .74.2.8Insensitivity to brake pipe pressure fall .74.2.9Insensitivity to distributor valve quick service device operation .84.2.10Isolation .84.2.11Leakage .84.3Vibration and shocks requirements.84.4Environment requirements .84.4.1General .84.4.2Temperature .94.4.3Other environmental conditions .94.5Compressed air quality . 114.6Service life . 114.7Fire behaviour . 114.8External appearance . 114.9Design requirements regarding pressure stress . 114.10Interfaces . 124.10.1General . 124.10.2Mechanical . 124.10.3Pneumatic . 125Materials . 126Type tests . 126.1General . 126.2Individual brake pipe accelerator tests . 126.2.1Test bench for individual brake pipe accelerator tests . 126.2.2Sampling for type tests . 136.2.3Test temperature and air quality . 146.2.4Procedure for type tests . 146.2.5Operation at extreme temperatures . 176.3Simulated train consist tests . 186.3.1Simulated train consist test bench . 186.3.2Sampling for train consist test . 196.3.3Test temperature and air quality . 196.3.4Test procedure . 197Routine test and inspection . 208Documentation . 20SIST EN 15612:2009+A1:2011



EN 15612:2008+A1:2010 (E) 3 9Designation . 2110Identification and marking . 21Annex ZA (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 2008/57/EC of the European Parliament and of the Council of 17 June 2008 on the interoperability of the rail system within the Community (Recast)"""" . 22!!!!deleted text"""" Bibliography . 28 SIST EN 15612:2009+A1:2011



EN 15612:2008+A1:2010 (E) 4 Foreword This document (EN 15612:2008+A1:2010) 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 April 2011, and conflicting national standards shall be withdrawn at the latest by April 2011. 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 document includes Amendment 1, approved by CEN on 30 August 2010. This document supersedes EN 15612:2008. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ". !This document 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 2008/57/EC. For relationship with EU Directive 2008/57/EC, see informative Annex ZA, which is an integral part 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, Croatia, 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. SIST EN 15612:2009+A1:2011



EN 15612:2008+A1:2010 (E) 5 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 SIST EN 15612:2009+A1:2011



EN 15612:2008+A1:2010 (E) 6 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 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. SIST EN 15612:2009+A1:2011



EN 15612:2008+A1:2010 (E) 7 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. 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 SIST EN 15612:2009+A1:2011



EN 15612:2008+A1:2010 (E) 8 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 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. SIST EN 15612:2009+A1:2011



EN 15612:2008+A1:2010 (E) 9 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. 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; SIST EN 15612:2009+A1:2011



EN 15612:2008+A1:2010 (E) 10  maximum absolute humidity: 30 g/m3 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 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+A1:2011



EN 15612:2008+A1:2010 (E) 11 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
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