1、BRITISH STANDARD BS EN 14596:2005 Tanks for transport of dangerous goods Service equipment for tanks Emergency pressure relief valve The European Standard EN 14596:2005 has the status of a British Standard ICS 13.300; 23.020.20; 23.060.40 BS EN 14596:2005 This British Standard was published under th
2、e authority of the Standards Policy and Strategy Committee on 21 April 2005 BSI 21 April 2005 ISBN 0 580 45833 4 National foreword This British Standard is the official English language version of EN 14596:2005. The UK participation in its preparation was entrusted to Technical Committee AUE/18, Tan
3、ks for the transport of dangerous goods, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may
4、be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users ar
5、e responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and
6、 keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 12, an inside back cover and a back cover. The BSI copyright notice dis
7、played in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN14596 March2005 ICS13.300;23.020.20;23.060.40 Englishversion TanksfortransportofdangerousgoodsServiceequipmentfor tanksEmerg
8、encypressurereliefvalve Citernesdestinesautransportdematiresdangereuses EquipementsdeservicepourciternesClapetde surpressionaccidentelle TanksfrdieBefrderunggefhrlicherGter BedienungsausrstungvonTanksNotentlastungsventil ThisEuropeanStandardwasapprovedbyCENon3February2005. CENmembersareboundtocomply
9、withtheCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanSta
10、ndardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechR
11、epublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFR
12、NORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2005CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN14596:2005:EEN 14596:2005 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Functi
13、ons5 5 Design characteristics 6 5.1 Relieving pressure.6 5.2 Weather protection 6 5.3 Drop test .6 5.4 Vapour venting performance6 5.5 Temperature range 7 5.6 Materials of construction 7 5.7 Dimensional characteristics .7 5.8 Electrical resistance 7 5.9 Optional function .7 6 Tests7 6.1 General7 6.2
14、 Production tests.7 6.3 Type tests .8 7 Marking .10 8 Installation, operating and maintenance instructions .10 Annex A (normative) Drop test apparatus 11 Bibliography 12 EN 14596:2005 (E) 3 Foreword This document (EN 14596:2005) has been prepared by Technical Committee CEN/TC 296 “Tanks for transpor
15、t of dangerous goods”, the secretariat 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 September 2005, and conflicting national standards shall be withdrawn at the lates
16、t by September 2005. This document forms part of a coherent standards programme (i.e. Tanks for transport of liquid dangerous goods with vapour pressure not exceeding 110 kPa (absolute pressure) at 50 C and petrol - Service Equipment). This standards programme comprises the following standards: EN 1
17、3081, 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 transport of dangerous goods - Service equipment for tanks -
18、 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. EN 13315, Tanks for transport of dangerous go
19、ods - 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 assembly. EN 14595, Tanks for tr
20、ansport 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. This document includes a Bibliography. According to the CEN/CENELEC Internal Regulations, th
21、e national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pola
22、nd, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14596:2005 (E) 4 Introduction An emergency pressure relief valve allows venting from a tank compartment during excess pressure. The emergency pressure relief valve may, in addition, perform the closing and opening fu
23、nctions of a fill hole cover, as specified in EN 13314 1. NOTE The emergency pressure relief valve forms part of an ADR 2 venting system, see 6.8.2.2.6 of ADR 2005, and should not be considered as a safety valve as defined in ADR. The function of the emergency pressure relief valve may also be perfo
24、rmed by the fill hole cover in accordance with EN 13314 1. EN 14596:2005 (E) 5 1 Scope This document covers the emergency pressure relief valve. It specifies the performance requirements and the critical dimensions of the emergency pressure relief valve. It also specifies the tests necessary to veri
25、fy the compliance of the equipment with this document. The service equipment specified by this document is suitable for use with liquid petroleum products and other dangerous substances of Class 3 of ADR 2 which have a vapour pressure not exceeding 110 kPa at 50 o C and petrol, and which have no sub
26、-classification as toxic or corrosive. 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 document (including any amendmen
27、ts) applies. EN 12266-1:2003, Industrial valves Testing of valves Part 1: Pressure tests, test procedures and acceptance criteria - Mandatory requirements. EN 12266-2, Industrial valves Testing of valves Part 2: Tests, test procedures and acceptance criteria - Supplementary requirements. ISO 2859-1,
28、 Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection. 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 relieving pressure pressure at which the emergency
29、 pressure relief valve starts to open 3.2 maximum working pressure (MWP) the maximum pressure to which the equipment is designed to operate, being: highest of the following three pressures: a) highest effective pressure allowed in the tank during filling (maximum filling pressure allowed); b) highes
30、t effective pressure allowed in the tank during discharge (maximum discharge pressure allowed); and c) effective gauge pressure to which the tank is subjected by its contents (including such extraneous gases as it may contain) at the maximum working temperature. 4 Functions When in any orientation,
31、the emergency pressure relief valve shall function as follows: open, to relieve excess pressure within the tank compartment; and close, when the excess pressure has been relieved; and EN 14596:2005 (E) 6 when closed, contain the substance within the tank compartment. 5 Design characteristics 5.1 Rel
32、ieving pressure The emergency pressure relief valve shall be vapour and liquid tight up to its relieving pressure. The relieving pressure of the emergency pressure relief valve shall be specified by the manufacturer and shall be not less than 110 % of the maximum working pressure (MWP) of the tank c
33、ompartment to which it is attached. 5.2 Weather protection The emergency pressure relief valve shall be designed, or provision made, to eliminate the accumulation of water, which could freeze and impair the operation of the valve. 5.3 Drop test Each type of emergency pressure relief valve shall be s
34、tructurally capable of withstanding, without leakage or permanent deformation that would affect its structural integrity, a drop test as described in 6.3.4. 5.4 Vapour venting performance The minimum vapour venting capacity of the valve shall be reached at a pressure less than the test pressure of t
35、he tank compartment to which it is attached. Table 1 specifies the minimum vapour venting capacity in accordance with the exposed area of the tank compartment. Table 1 Minimum venting capacity of the valve Exposed area of tank compartment Minimum venting capacity aExposed area of tank compartment Mi
36、nimum venting capacity am 2m 3 /h m 2m 3 /h 2 480 30 6 650 3 720 35 7 260 4 960 40 7 830 5 1 200 45 8 370 6 1 440 50 8 880 7 1 680 55 9 370 8 1 920 60 9 840 9 2 160 65 10 300 10 2 400 70 10 700 12 2 880 75 11 200 14 3 360 80 11 600 16 3 840 85 12 000 18 4 320 90 12 400 20 4 800 95 12 800 25 6 000 10
37、0 13 200 NOTE Interpolate for intermediate sizes.aStandard cubic metres of free air at a pressure of 101,3 kPa and at a temperature of 15 C. EN 14596:2005 (E) 7 5.5 Temperature range Unless otherwise specified, the design temperature range shall be 20 C to +50 C. Where the emergency pressure relief
38、valve is subjected to more severe conditions, the design temperature range shall be extended to 40 C or +70 C as applicable. 5.6 Materials of construction The manufacturer shall provide, with the equipment, a full material specification for those parts which may come into contact with the substances
39、 described in Clause 1. 5.7 Dimensional characteristics The height of any part of the emergency pressure relief valve shall not exceed 150 mm, above its mounting face, when in the fully open position. 5.8 Electrical resistance The electrical resistance between any conductive part of the emergency pr
40、essure relief valve, which may come into contact with the dangerous substances, and the main body of the valve shall not exceed 10 6 . Provision shall be made for bonding the main body of the valve to the tank such that the electrical resistance between the two shall not exceed 10 . 5.9 Optional fun
41、ction The emergency pressure relief valve may perform the opening and closing functions of the fill hole cover as specified in EN 13314. 6 Tests 6.1 General Two classes of tests are required: production tests and type tests. Testing methods and procedures shall conform to EN 12266-1 and EN 12266-2 e
42、xcept as specified within this document. 6.2 Production tests 6.2.1 General The number, frequency and sampling methods of production test samples shall be not less than those specified within ISO 2859-1 (AQL of 2.5). Production tests shall comprise the following: seat tightness test; and relieving p
43、ressure test. EN 14596:2005 (E) 8 6.2.2 Seat tightness test 6.2.2.1 Valve classification type The valve classification type shall be (for test method selection only): diaphragm valve (EN 12266-1:2003, Table A.3). 6.2.2.2 Test pressure The test pressure shall be the greater of 65 kPa or 1,3 times the
44、 MWP of the emergency pressure relief valve. 6.2.2.3 Test duration The test duration shall conform to Table A.4 of EN 12266-1:2003. 6.2.2.4 Acceptance criteria The acceptance criteria shall conform to rate A of EN 12266-1:2003, Table A.5. NOTE The relieving mechanisms may be locked to enable the tes
45、t pressure to be achieved. 6.2.3 Relieving pressure test 6.2.3.1 Test procedure The test fluid shall be air or other suitable gas. The choice of the fluid is the responsibility of the manufacturer. The test shall be performed on the complete valve. The valve shall be positioned in its normal operati
46、ng orientation. With the valve in the closed position, a steadily increasing pressure shall be applied to the upstream side of the valve. The pressure acting on the downstream side of the valve shall be equal to atmospheric pressure. Once the relieving pressure has been noted, the upstream pressure
47、shall be steadily reduced to confirm the reseat pressure. The valve shall be considered as starting to open when visually detectable leakage commences. Reseating of the valve shall occur when such leakage stops. 6.2.3.2 Acceptance criteria When tested in accordance with 6.2.3.1 the recorded relievin
48、g pressure shall be not less than the valves specified relieving pressure and the valve shall reseat at a pressure not less than 0,8 times the specified relieving pressure. 6.2.4 Test results Test results shall be recorded and maintained in accordance with the manufacturers procedures. 6.3 Type tests 6.3.1 General A minimum of 2 production samples of each model type shall be type tested to demonstrate the performance and mechanical strength of the design. NOTE Valves having one design, size and set pressure are considered
