1、BS EN 15612:2008ICS 45.060.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDRailway applications Braking Brake pipeaccelerator valve+A1:2010National forewordThis British Standard is the UK implementation of EN 15612:2008+A1:2010. It supersedes BS EN 15612:2008,
2、 which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“.The UK participation in its preparation wa
3、s entrusted to Technical Committee RAE/4, Braking.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance wi
4、th a British Standard cannot confer immunity from legal obligations.BS EN 15612:2008+A1:2010This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2008 BSI 2011Amendments/corrigenda issued since publicationDate Comments Implementation of
5、 CEN amendment A1:2010ISBN 978 0 580 70062 031 January 2011 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE 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
6、 acclratrice 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 t
7、he 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
8、 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 bod
9、ies 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 Ki
10、ngdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR 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+A1:201
11、0: EEN 15612:2008+A1:2010 (E) 2 Contents Page Foreword 41 Scope 52 Normative references 53 Terms and definitions .54 Design and manufacture .64.1 General 64.2 Functional requirements .64.2.1 General 64.2.2 Operating requirements 74.2.3 Train/vehicle behaviour .74.2.4 Affect of overcharge 74.2.5 Affe
12、ct of individual vehicle .74.2.6 Subsequent emergency application 74.2.7 Sensitivity .74.2.8 Insensitivity to brake pipe pressure fall 74.2.9 Insensitivity to distributor valve quick service device operation .84.2.10 Isolation 84.2.11 Leakage .84.3 Vibration and shocks requirements.84.4 Environment
13、requirements .84.4.1 General 84.4.2 Temperature .94.4.3 Other environmental conditions 94.5 Compressed air quality 114.6 Service life . 114.7 Fire behaviour . 114.8 External appearance . 114.9 Design requirements regarding pressure stress 114.10 Interfaces . 124.10.1 General . 124.10.2 Mechanical .
14、124.10.3 Pneumatic 125 Materials 126 Type tests 126.1 General . 126.2 Individual brake pipe accelerator tests 126.2.1 Test bench for individual brake pipe accelerator tests 126.2.2 Sampling for type tests 136.2.3 Test temperature and air quality . 146.2.4 Procedure for type tests 146.2.5 Operation a
15、t extreme temperatures 176.3 Simulated train consist tests . 186.3.1 Simulated train consist test bench . 186.3.2 Sampling for train consist test 196.3.3 Test temperature and air quality . 196.3.4 Test procedure 197 Routine test and inspection . 208 Documentation 20BS EN 15612:2008+A1:2010EN 15612:2
16、008+A1:2010 (E) 3 9 Designation 2110 Identification 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 wit
17、hin the Community (Recast)“ . 22!deleted text“ Bibliography 28BS EN 15612:2008+A1:2010EN 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
18、 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 doc
19、ument 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
20、 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 2008/5
21、7/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,
22、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. BS EN 15612:2008+A1:2010EN 15612:2008+A1:2010 (E) 5 1 Scope T
23、his 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
24、 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 docu
25、ment (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
26、 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
27、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 Pa
28、rt 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 fa
29、ll 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 BS EN 15612:2008
30、+A1:2010EN 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 press
31、ure 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.
32、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 throug
33、h 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 nor
34、mal 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 b
35、e 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
36、 defined rapid fall of brake pipe pressure to ensure a continuing rapid fall to below 2,5 bar. BS EN 15612:2008+A1:2010EN 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 eme
37、rgency 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, an
38、d 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
39、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
40、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 ov
41、ercharge 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 applicatio
42、n. 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
43、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
44、 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 em
45、ergency 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 int
46、o 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 c
47、ome 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 BS EN 15612:2008+A1:2010EN 15612:2008+A1:2010 (E) 8 2,5 bar shall not cause the brake pipe accelerator valve to operate. This r
48、equirement 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 de
49、vice. 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
