1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 16257:2012Tanks for the transport ofdangerous goods Serviceequipment Footvalve sizesother than 100 mm dia (nom)BS EN 16257:2012 BRITISH STANDARDNational forewordThis Britis
2、h Standard is the UK implementation of EN 16257:2012.The UK participation in its preparation was entrusted to TechnicalCommittee AUE/18, Tanks for the transport of dangerous goods.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does n
3、ot purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 69999 3ICS 23.020.20Compliance with a British Standard cannot confer immunity fromlegal obli
4、gations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2012.Amendments issued since publicationDate Text affectedBS EN 16257:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16257 October 2012 ICS 23.020.20 English Version
5、Tanks for the transport of dangerous goods - Service equipment - Footvalve sizes other than 100 mm dia (nom) Citernes destines au transport de matires dangereuses -Equipement de service - Clapets de fond avec diamtre nominal diffrent de 100 mm Tanks fr die Befrderung gefhrlicher Gter - Bedienungsaus
6、rstung - 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 for giving this European Standard the status of a na
7、tional 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 three official versions (English, French, German). A v
8、ersion 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 bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus
9、, 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, Spain, Sweden, Switzerland, Turkey and United Kingd
10、om. 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 national Members. Ref. No. EN 16257:2012: EBS EN 1
11、6257:2012EN 16257:2012 (E) 2 Contents Page Foreword . 3Introduction 41 Scope 52 Normative references . 53 Terms and definitions . 54 Functions . 55 Design characteristics 56 Tests . 77 Marking 78 Installation, operating and maintenance recommendations 7Annex A (normative) Footvalve to tank mounting
12、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 . 14Annex E (informative) Break-away test apparatus 15Annex F (informative) Preferred sizes 16Bibliography .
13、 17BS EN 16257:2012EN 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 secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either b
14、y 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 the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENEL
15、EC 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 under the general title. “Tanks for transport of liquid dangerous goods with vapour pressure not exceeding 110 kPa (a
16、bsolute 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, Tanks for transport of dangerous goods Service equipment for tanks Vapour transfer valve; EN 13083, Tanks for tran
17、sport 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 balanced footvalve; EN 13314, Tanks for transport of dangerous goods Service equipment for tanks Fill hole cover; E
18、N 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 Pressure balanced footvalve; EN 13317, Tanks for transport of dangerous goods Service equipment for tanks Manhole cover
19、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 equipment for tanks Emergency pressure relief valve. According to the CEN/CENELEC Internal Regulations, the national stan
20、dards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, L
21、uxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 16257:2012EN 16257:2012 (E) 4 Introduction The footvalve, also called emergency valve or internal security valve, the subject of this standard, is an
22、 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 unloading direction, that is, from the tank compartment into the run-off pipe only when externally actuated. The non-p
23、ressure 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 dangerous substances. The pressure balanced footvalve does not allow flow of dangerous substances in either the loading
24、 or unloading direction when not externally actuated, and stops the flow if the external actuation is interrupted or disengaged. BS EN 16257:2012EN 16257:2012 (E) 5 1 Scope This European Standard is applicable to non-pressure balanced and pressure balanced footvalves intended for loading and unloadi
25、ng and specifies the performance requirements, critical dimensions and tests necessary to verify the compliance of the equipment with this standard. Footvalves covered by this European standard are unsuitable for use in applications where the product velocity exceeds 5 m/sec The equipment specified
26、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 of Dangerous Goods by Road (flammable liquids) which have a vapour pressure not exceeding 110 kPa at 50 C and petrol, and wh
27、ich 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 indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest e
28、dition of the referenced document (including any amendments) applies. EN 13308:2002, Tanks for transport of dangerous goods Service equipment for tanks Non-pressure balanced footvalve EN 13316:2002, Tanks for transport of dangerous goods Service equipment for tanks Pressure balanced footvalve 3 Term
29、s 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-pressure balanced footvalves shall be in accordance with Clause 4 of EN 13308:2002 and for pressure balanced footvalves in acco
30、rdance 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 provided that all the requirements given in the standard are fulfilled. If smaller sizes than those given in the annexes of this s
31、tandard 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 requirements for each type of footvalve are as follows. 5.1 Pressure rating The requirements for non-pressure balanced footvalves sh
32、all be in accordance with 5.1 of EN 13308:2002 and for pressure balanced footvalves in accordance with 5.1 of EN 13316:2002. BS EN 16257:2012EN 16257:2012 (E) 6 5.2 Mounting The tank mounting flange dimensions shall be in accordance with Annex A. The pipe connection flange dimensions shall be in acc
33、ordance 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 13308:2002 and for pressure balanced footvalves in accordance with 5.5 of EN 13316:2002. 5.4 Break-away security The footvalve se
34、at 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 of accidental damage, the external housing shall break away, leaving the footvalve sealing mechanism within the tank compartment
35、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 diameter greater than 100 mm shall not exceed the value given by: (dt /100)2in kJ where dtis the nominal diameter in mm. 5.5 Temperatur
36、e 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 of EN 13316:2002. 5.6 Materials of construction The requirements for non-pressure balanced footvalves shall be in accordance with
37、 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 sustainable. 5.7 Electrical resistance The requirements for non-pressure balanced footvalves shall be in accordance with 5.9 of EN 13308:2
38、002 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 with 5.10 of EN 13308:2002 and for pressure balanced footvalves in accordance with 5.10 of EN 13316:2002. BS EN 16257:2012EN 162
39、57:2012 (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 footvalves in accordance with Clause 6 of EN 13316:2002. 7 Marking The marking requirements for non-pressure balanced footvalves shall be i
40、n 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 recommendations Installation, operation and maintenance instructions shall be provided for the equipment. BS EN 16257:2012EN 16257:2
41、012 (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 BS EN 16257:2012EN 16257:2012 (E) 9 Table A.1 Footvalve to tank mounting flange dimensions (Elbow type illustrated) Dimensions in millime
42、tres Diameter DrillingOutside diameter Main spigot diameter Pitch circle diameter No. holes (equispaced) Hole diameter D maxd1maxk 0,5 + 0,5 d2 - 0,3 270/268 188/200 240 12 14 230 163 190 8 14215 118 180 6 13 154 88 130 8 11,6BS EN 16257:2012EN 16257:2012 (E) 10 Annex B (normative) Footvalve run-off
43、 flange dimensions Figure B.1 Footvalve run-off flange dimensions 8 bolt hole spacing illustrated BS EN 16257:2012EN 16257:2012 (E) 11 Table B.1 Footvalve run-off flange dimensions Elbow type illustrated Dimensions in millimetres Diameter DrillingOutside diameter Inside diameter Pitch circle diamete
44、r 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 11,6BS EN 16257:2012EN 16257:2012 (E) 12 Annex C (normative) Footvalve run-off flange dimensions (square) Figure C.1 Footvalve run-off flange dimensions (squar
45、e) BS EN 16257:2012EN 16257:2012 (E) 13 Table C.1 Footvalve run-off flange dimensions (square) Dimensions in millimetres Flange DrillingA 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 BS EN 16
46、257:2012EN 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 BS EN 16257:2012EN 16257:2012 (E) 15 Annex E (informative) Break-away test apparatus The te
47、st rig is generally of steel construction and welded assy. Pendulum assembly to weigh (145 7,25) kg. Key 1 Shaft with a diameter of 63,5 mm 8 Solid bar with a diameter of 127 mm. 2 2off Bearing block 9 2 off Channel 150 mm x 76 mm x 5,5 mm 3 4off 152 mm x 76 mm RST 10 Optional extra restraining peg
48、4 Floor mounting plates secured by holding down bolts (4 each) 11 150 mm x 12,5 mm thick bar (length to suit) 5 Small vessel 12 Optional extra hoist and quick release latch 6 Optional extra stop latch 13 Optional extra lifting bracket 7 Emergency valve mounting plate 25 mm thick 14 Bearing mtg plate
49、 25 mm thick 15 Pendulum assembly (127 mm N/B tube) Figure E.1 Break-away test apparatus BS EN 16257:2012EN 16257:2012 (E) 16 Annex F (informative) Preferred sizes Dimensions in millimetres The naming convention of the valves is dt: dp. Table F.1 Preferred combination of sizes Pipe mounting diameter dp65 80 100 125 150 200 Tank shell mounting diameter dt200 x x 150 x x 125 x x 100 x Refer to EN 13308/EN 13316 80 x 65 x
