1、BSI Standards PublicationBS EN 14433:2014Tanks for the transport ofdangerous goods Tankequipment for the transport ofliquid chemicals and liquefiedgases Foot valvesBS EN 14433:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 14433:2014. Itsupersedes BS EN 14
2、433:2006 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee AUE/18, Tanks for the transport of dangerous goods.A list of organizations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 not purport to include all
3、 the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 82496 8ICS 13.300; 23.020.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This Brit
4、ish Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2014.Amendments issued since publicationDate Text affectedBS EN 14433:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14433 October 2014 ICS 13.300; 23.020.20 Supersedes EN 14433:2006E
5、nglish Version Tanks for the transport of dangerous goods - Tank equipment for the transport of liquid chemicals and liquefied gases - Foot valves Citernes de transport de matires dangereuses - quipements de la citerne pour le transport de produits chimiques liquides et de gaz liqufis - Clapets de f
6、ond Tanks fr die Befrderung gefhrlicher Gter - Ausrstung fr Tanks fr die Befrderung von flssigen Chemieprodukten und Flssiggasen - Bodenventile This European Standard was approved by CEN on 30 August 2014. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the
7、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-CENELEC Management Centre or to any CEN member. This European Standard e
8、xists 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-CENELEC Management Centre has the same status as the official versions. CEN members are the national
9、standards bodies 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
10、, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means re
11、served worldwide for CEN national Members. Ref. No. EN 14433:2014 EBS EN 14433:2014EN 14433:2014 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions . 4 4 Function 5 5 Design and materials . 5 5.1 General 5 5.2 Design . 5 5.3 Materials . 6 6 Test media 6 6.1 Hyd
12、raulic tests . 6 6.2 Pneumatic tests . 6 7 Type tests . 6 7.1 General 6 7.2 Valve casing hydraulic pressure test 6 7.3 Valve assembly pressure test 6 7.4 Closure, casing and valve assembly pneumatic tightness tests . 7 7.5 Cyclic test . 7 7.6 Breakaway test . 7 8 Production tests. 8 8.1 General 8 8.
13、2 Function test 8 8.3 Valve casing pressure test . 9 8.4 Closure, casing and valve assembly pneumatic tests. 9 9 Marking . 9 10 Supply requirements . 9 10.1 Order information 9 10.2 Installation and operation . 9 Annex A (normative) Verification of valve design type . 10 Annex B (informative) Exampl
14、es of breakaway vectors. 11 Bibliography 12 BS EN 14433:2014EN 14433:2014 (E) 3 Foreword This document (EN 14433:2014) has been prepared by Technical Committee CEN/TC 296 “Tanks for transport of dangerous goods”, the secretariat of which is held by AFNOR. This European Standard shall be given the st
15、atus of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2015 and conflicting national standards shall be withdrawn at the latest by April 2015. Attention is drawn to the possibility that some of the elements of this document may be the subjec
16、t of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14433:2006. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This European S
17、tandard has been submitted for reference into: the RID 1, and the technical annexes of the ADR 2. NOTE These regulations take precedence over any clause of this standard. It is emphasised that RID/ADR/ADN are being revised regularly at intervals of two years which may lead to temporary non- complian
18、ces with the clauses of this standard. Compared to EN 14433:2006 the following changes have been made: a) the scope of the standard has been enlarged to include liquefied gases; b) the references to ADR/RID have been included in the respective clauses of the main part of the standard; c) the normati
19、ve references have been updated; d) change of test conditions (test pressure, hold time). 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, Cze
20、ch 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 the United Kingdo
21、m. BS EN 14433:2014EN 14433:2014 (E) 4 1 Scope This European Standard specifies the requirements for foot valves for use on transportable tanks with a minimum working pressure greater than 50 kPa for the transport of dangerous goods by road and rail. It is applicable to metallic equipment for use on
22、 tanks with gravity and/or pressure bottom loading and discharge for liquid chemicals and liquefied gases. It includes carbon dioxide while excluding refrigerated liquefied gases. NOTE The standard is also applicable to liquefied gases including LPG, however, for a dedicated LPG standard see EN 1317
23、5 3. 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 edition of the referenced document (including any
24、amendments) applies. EN 12266-1:2012, Industrial valves - Testing of metallic valves - Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements EN 12266-2:2012, Industrial valves - Testing of metallic valves - Part 2: Tests, test procedures and acceptance criteria - S
25、upplementary requirements EN 12516-1, Industrial valves - Shell design strength - Part 1: Tabulation method for steel valve shells EN 12516-2, Industrial valves - Shell design strength - Part 2: Calculation method for steel valve shells EN 12516-3:2002, Valves - Shell design strength - Part 3: Exper
26、imental method EN 13445-1, Unfired pressure vessels - Part 1: General EN ISO 11299-1:2013, Plastics piping systems for renovation of underground gas supply networks - Part 1: General (ISO 11299-1:2011) 3 Terms and definitions For the purposes of this document, the following terms and definitions app
27、ly. 3.1 maximum working pressure MWP maximum pressure up to which the valve can be operated, not more than the test pressure divided by 1,3 SOURCE: ADR/RID chapter 6.8 3.2 maximum allowable working pressure MAWP maximum pressure up to which the valve can be operated, not more than the test pressure
28、divided by 1,3 (liquified gases) respectively 1,5 (liquids) SOURCE: ADR/RID chapter 6.7 BS EN 14433:2014EN 14433:2014 (E) 5 3.3 test pressure the pressure used for the pressure tests 3.4 nominal size DN numerical designation of the size of a component which is a convenient round number approximately
29、 equal to the manufacturing dimension in millimetres SOURCE: EN ISO 11299-1:2013 4 Function The footvalve is a primary valve located in the lower part of the tank to allow the controlled loading and discharge of the product and to ensure leaktightness in the closed condition. 5 Design and materials
30、5.1 General The footvalve shall be designed for a working pressure of at least 300 kPa. The footvalve shall normally be a non-pressure balanced design. If the valve is a pressure balanced design, a surge pressure of 5 times the MWP shall not jeopardize the tightness of the housing or the function of
31、 the valve. The manufacturer shall specify in drawings and other papers, the design and the materials of the footvalve. The valve specification shall include information regarding mating tank flange details. 5.2 Design 5.2.1 The valve shall provide a closure located within the tank shell. 5.2.2 The
32、valve closure shall be positioned so that the pressure in the tank acts to increase the force on the valve seat, and shall be so designed as to prevent self-opening of the valve. 5.2.3 The opening of the valve shall be such as to give a minimum flow path through the valve of a diameter equal to the
33、DN designation of the valve. 5.2.4 The operating mechanism shall be protected from inadvertent operation in transit either by a latching device or by locating within an enclosure. 5.2.5 The internal stop-valve of all filling and all discharge openings of tanks (for tank containers with a capacity gr
34、eater than 1 m3) intended for the carriage of liquefied flammable or toxic gases shall be instant-closing and shall close automatically in the event of an unintended movement of the tank or in the event of fire. It shall also be possible to operate the internal stop-valve by remote control. 5.2.6 Th
35、e operating mechanism of each valve shall have an indicator for the direction of opening and/or closing. 5.2.7 The external valve casing shall have a weakened section (e.g. a shear groove in the external casing or other appropriate means) so positioned that should the valve casing be removed by a se
36、vere impact, the sealing capability of the valve shall not be affected. This requires that, in the case of a bottom-operated valve, the operating mechanism of the valve be not directly connected to the valve closure. BS EN 14433:2014EN 14433:2014 (E) 6 5.2.8 Regarding the calculation of flanges and
37、body wall thickness the requirements given in EN 12516-1, EN 12516-2 and EN 12516-3 or EN 13445-1 apply. 5.3 Materials 5.3.1 The manufacturer shall provide, with the equipment, the material specification for those parts that may come into contact with the product. 5.3.2 The material elongation at fr
38、acture of the pressure-loaded components of the valve shall be a minimum of 12 %. 5.3.3 The relevant EN reference, where possible, for the valve casing material shall be permanently marked on the valve casing. Should no EN exist then the appropriate national standard designation may be used. 6 Test
39、media 6.1 Hydraulic tests Hydraulic tests shall be carried out using a fluid in accordance with EN 12266-2:2012, A.1.5. 6.2 Pneumatic tests Pneumatic tests shall be carried out using a gas in accordance with EN 12266-2:2012, A.1.5. 7 Type tests 7.1 General Each valve used for testing shall conform t
40、o the drawings and dimensions specified and specification provided by the manufacturer. Each design of valve, as verified in Annex A, shall be subjected to a type test. Type testing according to 7.2 to 7.6 shall be carried out under ambient conditions. If the valve is required to operate outside the
41、 temperature range 40 C to +50 C, the design shall be taken into account either in the type testing or by a validated calculation method. For the calculation of the test pressure, EN 12516-3:2002, 6.3 and 6.4 apply. The tests shall be carried out with the casing/valve attached to a flange equivalent
42、 to that for which its use is intended. 7.2 Valve casing hydraulic pressure test The valve casing shall be hydraulically tested, using a test medium conforming to 6.1 at a pressure equal to a minimum of 2,25 times the MWP or 400 kPa whichever is the greater. The test pressure shall be maintained for
43、 a minimum of 5 min on the valve casing without permanent deformation occurring. 7.3 Valve assembly pressure test The valve assembly shall be hydraulically or pneumatically tested, using a test medium conforming to 6.1 or 6.2 at a pressure equal to 1,5 times the MWP (MAWP), or 400 kPa, whichever is
44、the greater. The test pressure shall be maintained for a minimum of 10 min on the valve assembly. The leakage shall not exceed Rate A as defined in EN 12266-1:2012, Table A.5. Each assembly pressure test shall be carried out: a) with the valve in the closed position and the outlet open to test for l
45、eakage from the seats; BS EN 14433:2014EN 14433:2014 (E) 7 b) with the valve in the open position and the outlet closed off to test for leakage from gland seals and body joints. 7.4 Closure, casing and valve assembly pneumatic tightness tests For each design of the valve, as defined in Annex A, the
46、closure, the casing and the valve assembly shall be pneumatically tested, using a test medium conforming to 6.2, at pressures equal to 20 kPa and 1,0 times the MWP (MAWP). The valve closure, casing and valve assembly shall be totally immersed in a water bath, or, where total immersion of the valve c
47、losure, casing and valve assembly is not possible, a suitable leak detection fluid shall be applied. The test pressure shall be maintained for a minimum of 10 min on the valve closure, casing and valve assembly. The leakage shall not exceed Rate A as specified in EN 12266-1:2012, Table A.5. Each pne
48、umatic tightness test shall be carried out: a) with the valve in the closed position and the outlet open to test for leakage from the valve seats; b) with the valve in the open position and the outlet closed off to test for leakage from gland seals or body joints. If the tests defined above do not c
49、over all seals to the environment, these seals of the valve assembly shall also be tested. 7.5 Cyclic test The valve assembly shall be subjected to a mechanical cycle test to a minimum of 1 000 full cycles (“open” to “closed”) without pressure and 10 full cycles (“open” to “closed”) at MWP (MAWP) or maximum rating coupling pressure at ambient temperature being applied. After completion of the cyclic test, the valve assembly shall be tested in accordance with 7.4 and the leakage shall not exceed Rate A as defined in EN 12266-1:2012, Table A.5. 7.6
