1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12561-2:2011Railway applications TankwagonsPart 2: Bottom emptying devices for liquidproducts including vapour returnIncorporating corrigendum August 2011BS EN 12561-2:2011
2、 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12561-2:2011.It supersedes BS EN 12561-2:2002 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee RAE/1/-/9, Railway Applications - Wagons (Tank/Freight).A list of organ
3、izations 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. BSI 2011ISBN 978 0 580 76298 7ICS 13.300; 45.060.20 Compliance with a British
4、 Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2011.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e d31 August 2011 Implementation of CEN Correction Not
5、ice July 2011: modification of Table 1 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12561-2 June 2011 ICS 13.300; 45.060.20 Supersedes EN 12561-2:2002English Version Railway applications - Tank wagons - Part 2: Bottom emptying devices for liquid products including vapour return Applications
6、ferroviaires - Wagons citernes - Partie 2 : Dispositifs de vidange par le bas pour produits liquides, y compris la rcupration de vapeur Bahnanwendungen - Kesselwagen - Teil 2: Untenliegende Entleereinrichtung fr flssige Stoffe einschlielich Gaspendelung This European Standard was approved by CEN on
7、3 June 2011. 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
8、obtained on application to the CEN-CENELEC 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 th
9、e CEN-CENELEC 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, Luxembo
10、urg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights
11、 of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12561-2:2011: EBS EN 12561-2:2011EN 12561-2:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Requirements .54.1 General 54.2 Locks and seals .54.3 Dim
12、ensions .55 Bottom discharge line .55.1 General arrangement .55.2 Internal bottom valve .65.3 External valves .65.4 External branch pipes .65.5 Earthing devices 66 Vapour return line 77 Reserved spaces for connection devices .78 Threaded coupling .9Annex A (informative) Quick couplings for vapour re
13、turn . 11Bibliography . 12Figures Figure 1 General arrangement of bottom discharge line .6Figure 2 Example of vapour line arrangement 7Figure 3 Reserved spaces for connection devices 8Figure 4 Coupling dimensions 9Figure 5 Cap dimensions . 10Figure A.1 Dimensions of vapour return coupling 11Table Ta
14、ble 1 Thread dimensions .9BS EN 12561-2:2011EN 12561-2:2011 (E) 3 Foreword This document (EN 12561-2:2011) 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, eit
15、her by publication of an identical text or by endorsement, at the latest by December 2011, and conflicting national standards shall be withdrawn at the latest by December 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN a
16、nd/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12561-2:2002. This European Standard Railway applications Tank wagons consists of the following parts: Part 1: Identification plates for tank wagons for the carriage of dangerous go
17、ods; Part 2: Bottom emptying devices for liquid products including vapour return; Part 3: Bottom filling and emptying devices for gases liquefied under pressure; Part 4: Devices for top filling and emptying of liquid products; Part 5: Devices for vapour return while filling or emptying of liquid pro
18、ducts; Part 6: Manholes; Part 7: Platforms and ladders; Part 8: Heating connections. The changes made during this revision are editorial because of the change of the title of part 1 and the necessary updates of references. According to the CEN/CENELEC Internal Regulations, the national standards org
19、anizations 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, P
20、ortugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 12561-2:2011EN 12561-2:2011 (E) 4 1 Scope This European Standard specifies requirements on and characteristics of bottom emptying devices on tank wagons used for the carriage of liquid substances of RID. T
21、his European Standard specifies the most important dimensions of connection devices for the emptying of the tank. Safety functions of these devices are subject to RID requirements and not described in this document. This European Standard is applicable to bottom vapour return devices where fitted to
22、 tank wagons. This European standard applies to new tank wagons built after the 1stJanuary 2010. 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
23、edition of the referenced document (including any amendments) applies. 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) EN ISO 286-1, Geometrical product specifications (GPS) ISO code system for toleran
24、ces on linear sizes Part 1: Basis of tolerances, deviations and fits (ISO 286-1:2010) EN 14564, Tanks for transport of dangerous goods Terminology ISO 3419, Non-alloy and alloy steel butt-welding fittings ISO 4200:1991, Plain end steel tubes, welded and seamless general tables of dimensions and mass
25、es per unit length ISO 7005-1:1992, Metallic flanges Part 1: Steel flanges 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14564 and the following apply. 3.1 auto vent valve tank ventilation device linked with the internal bottom valve, which opens si
26、multaneously with the internal bottom valve NOTE 1 The auto vent valve is a valve that only opens during discharge. NOTE 2 As the auto vent valve remains closed during transport, it meets the requirements of RID. 3.2 stop valve part of the internal bottom valve comprising the disc, the gasket, the s
27、pring and the seat BS EN 12561-2:2011EN 12561-2:2011 (E) 5 4 Requirements 4.1 General Emptying devices shall be designed to minimise product residue in all their constituent parts following loading and unloading. Tank wagons for liquid chemical and petroleum products with bottom emptying devices sha
28、ll be fitted with a double arm outlet pipe designed to empty the tank and in conformity with this standard. 4.2 Locks and seals External valves as well as internal bottom valves shall be capable of being secured in their closed position to prevent any unintentional opening through impact or an inadv
29、ertent act. The operating controls of the external valves shall also be equipped with devices to which a seal can be properly attached. For customs seals, a hole of diameter 15 mm shall be required. 4.3 Dimensions All dimensions are given in millimetres. Unless otherwise specified in this European S
30、tandard the tolerances of EN ISO 286-1 apply for all dimensions. 5 Bottom discharge line 5.1 General arrangement The bottom discharge line shall have a nominal diameter of not less than 100 mm. The bottom discharge line shall consist of: a) ,an internal bottom valve in accordance with 5.2, except fo
31、r tank wagons intended for the carriage of certain crystallisable or highly viscous substances; b) an external branch pipe; c) an external valve shall be fitted at each end of the branch pipe. If a threaded connection is used, it shall be in accordance with the requirements of Clause 8. NOTE A gravi
32、ty coupling according to EN 13315 can be used for tank wagons transporting petroleum products. These fittings shall be arranged as shown in Figure 1. BS EN 12561-2:2011EN 12561-2:2011 (E) 6 Key 1 internal bottom valve 2 external valve 3 threaded coupling or flange or equivalent device 4 branch pipe
33、Figure 1 General arrangement of bottom discharge line 5.2 Internal bottom valve Internal bottom valves and associated vent valves need to meet the requirements of RID. 5.3 External valves The flanged connections for the valves shall comply with PN 16 according to ISO 7005-1:1992, face type B. The se
34、tting whether open or closed and/or the direction of closure of external valves shall be capable of being visually verified except when a dry break self-sealing coupling is used. 5.4 External branch pipes The external branch pipes shall be horizontal in order to minimise product residue in the pipe
35、following loading and unloading. It is recommended that external branch pipes be built with seamless line pipes and butt welding fittings (straight tees, long radius elbows, etc.) made from low temperature steel as specified in ISO 9329-3. If welded pipes are used, they shall exhibit a suitable degr
36、ee of safety comparable to that of the shell itself. Dimensions of line pipes shall be as specified by serial 1 Grade F specified in ISO 4200:1991. Dimensions of butt weld fittings shall be as specified in ISO 3419. 5.5 Earthing devices Two stainless steel earthing plates shall be welded on each sid
37、e of the tank wagon. Their dimensions shall be at least 40 mm 80 mm 5 mm. They shall be positioned within the reserved space defined in Figure 3. BS EN 12561-2:2011EN 12561-2:2011 (E) 7 6 Vapour return line The vapour return line where fitted shall consist of: a) an auto vent valve or at least one o
38、f the vacuum relief valves according to the requirement of 5.2; b) a branch pipe; c) at each end of the branch pipe a flange DN 80 PN 16 and e.g. a vapour return coupling according to the requirements of Annex A (informative). Example of arrangements is given in Figure 2. Key 1 auto-vent valve 2 con
39、necting pipe 3 coupling 4 branch pipe NOTE These figures are given only as an example. Figure 2 Example of vapour line arrangement The vapour return line shall be designed in such a way that the effective cross-sectional area shall not be less than 1 960 mm (equivalent to a 50 mm diameter pipe). Mea
40、sures shall be taken to protect shells against the risk of deformation as a result of a negative internal pressure during discharge. Vacuum relief devices shall be installed either at the top of the tank or in the vapour return line. Where the rate of discharge of tank wagon exceeds 120 m3/h the cro
41、ss sectional area of vapour return devices shall be increased accordingly. The structure of the vapour return line pipe shall meet the requirements specified in 5.2. The vacuum relief devices shall also operate when the vapour return devices are not connected during unloading. 7 Reserved spaces for
42、connection devices Except for specific cases agreed between the customer and the manufacturer, the connecting faces of the discharge and vapour return couplings shall be positioned as shown in Figure 3. BS EN 12561-2:2011EN 12561-2:2011 (E) 8 Dimension in millimetres Key 1 middle of tank wagon 2 tan
43、k longitudinal axle 3 reserved space 4 top of rails 5 branch pipe of discharge line 6 branch pipe of vapour return line 7 Distance between vertical planes NOTE 1 These dimensions are given for new and empty tank wagons. NOTE 2 These dimensions are based on the international loading gauge. For domest
44、ic traffic in Great Britain and for traffic of continental tank wagons running in Great Britain, the Kinematic gauge for Great Britain rules defined in the Technical Specification for Interoperability for Freight Wagons also apply. Figure 3 Reserved spaces for connection devices Distance between ver
45、tical planes shall where possible be kept to a minimum. BS EN 12561-2:2011EN 12561-2:2011 (E) 9 8 Threaded coupling Except for specific cases agreed between the customer and the manufacturer, the bottom discharge lines shall be fitted with a threaded coupling as shown in Figure 4 and given in Table
46、1 and caps as shown in Figure 5. The caps shall be fitted with a loss preventing device. Dimension in millimetres Figure 4 Coupling dimensions Table 1 Thread dimensions External diameter Minor diameter Pitch diameter Pitch Number of thread per 25,4 mm Radius Thread height Section Gasket d d1d2p z r
47、t1Td3,e mm mm mm mm mm mm mm2mm General limit deviations are 0,25 mm except for threads where tolerances from EN ISO 228-1 apply. 139,705 127,313 133,509 9,677 2 5/8 1,329 6,196 12 730 130 3 BS EN 12561-2:2011EN 12561-2:2011 (E) 10 Dimensions in millimetres Figure 5 Cap dimensions NOTE This figure i
48、s an example of the caps, other dimensions could be used except 55 mm, d, for Z view and 250 mm for the maximum external dimension of the cap. BS EN 12561-2:2011EN 12561-2:2011 (E) 11 Annex A (informative) Quick couplings for vapour return The vapour return coupling shall consist of a dry quick coup
49、ling. It shall be fitted with an internal closure operated by the female part of the coupling. Dimensions of vapour return couplings shall be as shown in Figure A.1. The dry coupling shall be provided with an easy-to-handle dust-proof cap with attachment facility to a chain or a stainless steel wire cable. In order to make the vapour return coupling perfectly visible from the outside, its dust-proof cap shall be coloured “yellow-green“. Dimensions in millimet
