1、December 2012 Translation by DIN-Sprachendienst.English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).I
2、CS 23.020.20!$“1929058www.din.deDDIN EN 16257Tanks for the transport of dangerous goods Service equipment Footvalve sizes other than 100 mm dia (nom);English version EN 16257:2012,English translation of DIN EN 16257:2012-12Tanks fr die Befrderung gefhrlicher Gter Bedienungsausrstung Bodenventile mit
3、 einem Nenndurchmesser von mehr oder weniger als 100 mm;Englische Fassung EN 16257:2012,Englische bersetzung von DIN EN 16257:2012-12Citernes destines au transport de matires dangereuses Equipement de service Dimension des clapets de fond dun diamtre nominal diffrent de 100 mm;Version anglaise EN 16
4、257:2012,Traduction anglaise de DIN EN 16257:2012-12www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1911.12 DIN EN 16257:2012-12 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technica
5、l Committee CEN/TC 296 “Tanks for transport of dangerous goods” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Tankanlagen (Tank Installations Standards Committee), Working Committee NA 104-02-07 AA Ausrstungen fr Transporttanks. The DIN
6、 Standard corresponding to the International Standard referred to in this document is as follows: ISO 2859-1 DIN ISO 2859-1 National Annex NA (informative) Bibliography DIN ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL)
7、 for lot-by-lot inspection EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16257 October 2012 ICS 23.020.20 English Version Tanks for the transport of dangerous goods - Service equipment - Footvalve sizes other than 100 mm dia (nom) Citernes destines au transport de matires dangereuses - Tanks
8、fr die Befrderung gefhrlicher Gter - Bedienungsausrstung - Bodenventile mit einem Nenndurchmesser von mehr oder weniger als 100 mm This European Standard was approved by CEN on 25 August 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions fo
9、r 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-CENELEC Management Centre or to any CEN member. This European Standard exists in thre
10、e 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-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bod
11、ies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, S
12、pain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN
13、national Members. Ref. No. EN 16257:2012: Equipement de service - Dimension des clapets de fond dun diamtre nominal diffrent de 100 mm 2 Contents Page Foreword . 3Introduction 41 Scope 52 Normative references . 53 Terms and definitions . 54 Functions . 55 Design characteristics 56 Tests . 77 Marking
14、 78 Installation, operating and maintenance recommendations 7Annex A (normative) Footvalve to tank mounting flange dimensions . 8Annex B (normative) Footvalve run-off flange dimensions 10Annex C (normative) Footvalve run-off flange dimensions (square) 12Annex D (normative) Break-away test positions
15、. 14Annex E (informative) Break-away test apparatus 15Annex F (informative) Preferred sizes 16Bibliography . 17DIN EN 16257:2012-12 EN 16257:2012 (E) 3 Foreword This document (EN 16257:2012) has been prepared by Technical Committee CEN/TC 296 “Tanks for the transport of dangerous goods”, the secreta
16、riat of which is held by AFNOR. 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 2013, and conflicting national standards shall be withdrawn at the latest by April 2013. Attention is drawn to
17、 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 forms part of a coherent standards programme comprising the following standards unde
18、r the general title. “Tanks for transport of liquid dangerous goods with vapour pressure not exceeding 110 kPa (absolute pressure) at 50 C and petrol - Service equipment“ : EN 13081, Tanks for transport of dangerous goods Service equipment for tanks Vapour collection adaptor and coupler; EN 13082, T
19、anks for transport of dangerous goods Service equipment for tanks Vapour transfer valve; EN 13083, Tanks for transport of dangerous goods Service equipment for tanks Adaptor for bottom loading and unloading; EN 13308, Tanks for transport of dangerous goods Service equipment for tanks Non-pressure ba
20、lanced footvalve; EN 13314, Tanks for transport of dangerous goods Service equipment for tanks Fill hole cover; EN 13315, Tanks for transport of dangerous goods Service equipment for tanks Gravity discharge coupler; EN 13316, Tanks for transport of dangerous goods Service equipment for tanks Pressur
21、e balanced footvalve; EN 13317, Tanks for transport of dangerous goods Service equipment for tanks Manhole cover assembly; EN 14595, Tanks for transport of dangerous goods Service equipment for tanks Pressure and vacuum breather vent; EN 14596, Tanks for transport of dangerous goods Service equipmen
22、t for tanks Emergency pressure relief valve. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Forme
23、r Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 16257:2012-12 EN 16257:2012 (E) 4 I
24、ntroduction The footvalve, also called emergency valve or internal security valve, the subject of this standard, is an internal self closing stop valve ensuring the primary containment to confine the dangerous substances within the tank when closed. It allows the flow of dangerous substances in the
25、unloading direction, that is, from the tank compartment into the run-off pipe only when externally actuated. The non-pressure balanced footvalve shall be capable of allowing transfer of dangerous substances in the bottom loading direction through self-actuation by the hydraulic force of the loaded d
26、angerous substances. The pressure balanced footvalve does not allow flow of dangerous substances in either the loading or unloading direction when not externally actuated, and stops the flow if the external actuation is interrupted or disengaged. DIN EN 16257:2012-12 EN 16257:2012 (E) 5 1 Scope This
27、 European Standard is applicable to non-pressure balanced and pressure balanced footvalves intended for loading and unloading and specifies the performance requirements, critical dimensions and tests necessary to verify the compliance of the equipment with this standard. Footvalves covered by this E
28、uropean standard are unsuitable for use in applications where the product velocity exceeds 5 m/sec The equipment specified by this standard is suitable for use with liquid petroleum products and other dangerous substances of Class 3 of ADR - European Agreement concerning the International Carriage o
29、f Dangerous Goods by Road (flammable liquids) which have a vapour pressure not exceeding 110 kPa at 50 C and petrol, and which have no sub-classification as toxic or corrosive. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are in
30、dispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13308:2002, Tanks for transport of dangerous goods Service equipment for tanks Non-pressure balanced foo
31、tvalve EN 13316:2002, Tanks for transport of dangerous goods Service equipment for tanks Pressure balanced footvalve 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 13308:2002 and EN 13316:2002 apply. 4 Functions The requirements for non-pres
32、sure balanced footvalves shall be in accordance with Clause 4 of EN 13308:2002 and for pressure balanced footvalves in accordance with Clause 4 of EN 13316:2002. Smaller dimensions for other purposes than loading and unloading (e.g. emptying the water sump of aircraft refuellers) may be used provide
33、d that all the requirements given in the standard are fulfilled. If smaller sizes than those given in the annexes of this standard are chosen, the dimensions of the flanges for connecting the tank and the pipework shall be designed for those dimensions. 5 Design characteristics The minimum requireme
34、nts for each type of footvalve are as follows. 5.1 Pressure rating The requirements for non-pressure balanced footvalves shall be in accordance with 5.1 of EN 13308:2002 and for pressure balanced footvalves in accordance with 5.1 of EN 13316:2002. DIN EN 16257:2012-12 EN 16257:2012 (E) 6 5.2 Mountin
35、g The tank mounting flange dimensions shall be in accordance with Annex A. The pipe connection flange dimensions shall be in accordance with Annex B or Annex C according to the specified type. 5.3 Actuation The requirements for non-pressure balanced footvalves shall be in accordance with 5.5 of EN 1
36、3308:2002 and for pressure balanced footvalves in accordance with 5.5 of EN 13316:2002. 5.4 Break-away security The footvalve seat shall be designed to be located within the envelope of the tanker compartment The footvalve shall be designed with reference to Annexes D and E, such that in the event o
37、f accidental damage, the external housing shall break away, leaving the footvalve sealing mechanism within the tank compartment intact. The impact energy required to break away the external housing of footvalves with a nominal diameter of less than 100 mm shall not exceed 1 kJ with a nominal diamete
38、r greater than 100 mm shall not exceed the value given by: (dt /100)2in kJ where dtis the nominal diameter in mm. 5.5 Temperature range The requirements for non-pressure balanced footvalves shall be in accordance with 5.7 of EN 13308:2002 and for pressure balanced footvalves in accordance with 5.7 o
39、f EN 13316:2002. 5.6 Materials of construction The requirements for non-pressure balanced footvalves shall be in accordance with 5.8 of EN 13308:2002 and for pressure balanced footvalves in accordance with 5.8 of EN 13316:2002. Whenever possible, selected materials shall be recyclable and sustainabl
40、e. 5.7 Electrical resistance The requirements for non-pressure balanced footvalves shall be in accordance with 5.9 of EN 13308:2002 and for pressure balanced footvalves in accordance with 5.9 of EN 13316:2002. 5.8 Strainer The requirements for non-pressure balanced footvalves shall be in accordance
41、with 5.10 of EN 13308:2002 and for pressure balanced footvalves in accordance with 5.10 of EN 13316:2002. DIN EN 16257:2012-12 EN 16257:2012 (E) 7 6 Tests The test requirements for non-pressure balanced footvalves shall be in accordance with Clause 6 of EN 13308:2002 and for pressure balanced footva
42、lves in accordance with Clause 6 of EN 13316:2002. 7 Marking The marking requirements for non-pressure balanced footvalves shall be in accordance with Clause 7 of EN 13308:2002 and for pressure balanced footvalves in accordance with Clause 7 of EN 13316:2002 8 Installation, operating and maintenance
43、 recommendations Installation, operation and maintenance instructions shall be provided for the equipment. DIN EN 16257:2012-12 EN 16257:2012 (E) 8 Annex A (normative) Footvalve to tank mounting flange dimensions Figure A.1 Footvalve to tank mounting flange dimensions 8 bolt hole spacing illustrated
44、 DIN EN 16257:2012-12 EN 16257:2012 (E) 9 Table A.1 Footvalve to tank mounting flange dimensions (Elbow type illustrated) Dimensions in millimetres Diameter DrillingOutside diameter Main spigot diameter Pitch circle diameter No. holes (equispaced) Hole diameter D maxd1maxk 0,5 + 0,5 d2 - 0,3 270/268
45、 188/200 240 12 14 230 163 190 8 14215 118 180 6 13 154 88 130 8 11,6DIN EN 16257:2012-12 EN 16257:2012 (E) 10 Annex B (normative) Footvalve run-off flange dimensions Figure B.1 Footvalve run-off flange dimensions 8 bolt hole spacing illustrated DIN EN 16257:2012-12 EN 16257:2012 (E) 11 Table B.1 Fo
46、otvalve run-off flange dimensions Elbow type illustrated Dimensions in millimetres Diameter DrillingOutside diameter Inside diameter Pitch circle diameter No. holes (equispaced) Hole diameter D maxd1 1,0 k 0,5 + 0,5 d2 - 0,3 175 100 150 8 14 240/242 150 210 12 14154 80 130 8 11,6 154 65 130 8 11,6DI
47、N EN 16257:2012-12 EN 16257:2012 (E) 12 Annex C (normative) Footvalve run-off flange dimensions (square) Figure C.1 Footvalve run-off flange dimensions (square) DIN EN 16257:2012-12 EN 16257:2012 (E) 13 Table C.1 Footvalve run-off flange dimensions (square) Dimensions in millimetres Flange DrillingA
48、 maxInside diameter Pitch circle diameter No. holes (equispaced) Hole diameter d1 1,0 k 0,5 + 0,5 d2 - 0,3 140 100 150 4 14 120 80 130 10,5110 80 120 4 11 DIN EN 16257:2012-12 EN 16257:2012 (E) 14 Annex D (normative) Break-away test positions Dimensions in millimetres Key 1 Point of impact NOTE Impact point to be on centre line of valve. Figure D.1 Break-away test positions DIN EN 16257:2012-12 EN
