1、BSI Standards PublicationBS EN 16321-2:2013Petrol vapour recovery duringrefuelling of motor vehicles atservice stationsPart 2: Test methods for verification ofvapour recovery systems at service stationsBS EN 16321-2:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation
2、 of EN 16321-2:2013.The UK participation in its preparation was entrusted to TechnicalCommittee PVE/393/7, Stage II Vapour Recovery Systems at FillingStations.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include
3、 all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 76032 7ICS 75.200Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Sta
4、ndard was published under the authority of theStandards Policy and Strategy Committee on 30 September 2013.Amendments issued since publicationDate Text affectedBS EN 16321-2:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16321-2 September 2013 ICS 75.200 English Version Petrol vapour recov
5、ery during refuelling of motor vehicles at service stations - Part 2: Test methods for verification of vapour recovery systems at service stations Rcupration des vapeurs dessence lors du ravitaillement en carburant des vhicules moteur dans les stations-service - Partie 2: Mthodes dessai pour la vrif
6、ication des systmes de rcupration des vapeurs dans les stations-service Benzindampf-Rckfhrung whrend der Betankung von Kraftfahrzeugen an Tankstellen - Teil 2: Prfverfahren fr die Kontrolle von Gasrckfhrungssystemen an TankstellenThis European Standard was approved by CEN on 26 July 2013. CEN member
7、s 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 obtained on application
8、 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 the CEN-CENELEC Managemen
9、t 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Li
10、thuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, 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,
11、 B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16321-2:2013: EBS EN 16321-2:2013EN 16321-2:2013 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Requirements for
12、petrol vapour/petrol ratio .4 5 Measurement methods for in service tests .4 5.1 General 4 5.2 Sequence of tests 5 5.3 Preparation .6 5.4 Measurement principle with simulated petrol flow (dry test method) 6 5.4.1 Test procedure .6 5.4.2 Evaluation .7 5.5 Measurement principle with real petrol flow (w
13、et test method A) 8 5.5.1 Test procedure .8 5.5.2 Evaluation .9 5.6 Measurement principle with real petrol flow (wet test method B) . 10 5.6.1 Test procedure 10 5.6.2 Evaluation 11 6 Automatic monitoring systems . 12 7 Test report . 12 8 Environmental aspects 12 Annex A (normative) Monitoring system
14、s Test for deactivation of a delivery point 13 Annex B (informative) Example of test report on the verification of vapour recovery systems 14 Annex C (informative) Environmental aspects 17 BS EN 16321-2:2013EN 16321-2:2013 (E) 3 Foreword This document (EN 16321-2:2013) has been prepared by Technical
15、 Committee CEN/TC 393 “Equipment for storage tanks and for filling stations”, the secretariat of which is held by DIN. 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 March 2014, and conflicting n
16、ational standards shall be withdrawn at the latest by March 2014. Attention is drawn to 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 document has be
17、en prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. EN 16321, Petrol vapour recovery during refuelling of motor vehicles at service stations, is divided into the following parts: Part 1: Test methods for the type approval efficiency assessment
18、 of petrol vapour recovery systems; Part 2: Test methods for verification of vapour recovery systems at service stations. WARNING Persons using this European Standard should be familiar with measurement principles. This standard does not purport to address all of the safety problems, if any, associa
19、ted with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. The application of this standard is only valid on installations that comply with manufacturers requirements. According to the
20、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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hun
21、gary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 16321-2:2013EN 16321-2:2013 (E) 4 1 Scope This European Standard specifies the test methods for ve
22、rification of vapour recovery systems at service stations (Stage II). This European Standard does not specify the test method for the air and vapour tightness testing of the vapour recovery systems at service stations. 2 Normative references The following documents, in whole or in part, are normativ
23、ely 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 amendments) applies. EN 16321-1:2013, Petrol vapour recovery during refuelling of moto
24、r vehicles at service stations Part 1: Test methods for the type approval efficiency assessment of petrol vapour recovery systems 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 16321-1:2013 apply. 4 Requirements for petrol vapour/petrol ratio The pet
25、rol vapour/petrol ratio shall be equal to or greater than 0,95 but less than or equal to 1,05. 5 Measurement methods for in service tests 5.1 General In this European Standard three test methods for verification of vapour recovery systems at service stations are described. For any verification only
26、one method shall be employed. The in service verification test shall only be carried out at ambient temperature between +5 C to +25 C under real or simulated petrol flow conditions. Where it has been demonstrated that the combination of vapour recovery system and the verification equipment operates
27、to this standard at a temperature range beyond +5 C to +25 C, there shall be a technical file which defines: how this has been achieved; justification for the test method; the upper and lower temperature limits for performing the verification. This technical file shall be available. The seals of the
28、 weights and measures components of the fuel dispenser shall not be broken. For all tests, the instructions of the manufacturer of the vapour recovery system shall be followed. BS EN 16321-2:2013EN 16321-2:2013 (E) 5 Consult manufacturers instructions for the location of the permanently fixed label,
29、 in accordance with EN 16321-1, which contains the setting data relevant for the measurements (pulsing rate of the fuel dispenser, correction factor, certificate number of the built-in vapour recovery systems, etc.). After testing, the system shall be returned to normal operation. 5.2 Sequence of te
30、sts For each nozzle of the vapour recovery system to be tested the ambient temperature shall be measured at the start and end of the test sequence using a temperature measuring device, measuring range 0 C to 40 C and an accuracy of maximum 1 C. The temperatures shall be recorded. If the temperature
31、at the start of the test is outside +5 C to +25 C no test shall be carried out except where the temperature is within the extended temperature range according to 5.1. If the temperature at the end of the test is outside +5 C to +25 C the test results are not valid except where the temperature is wit
32、hin the temperature range according to 5.1. The test sequence for each nozzle shall be as set out below and given in Figure 1. Where the test result meets the requirement of Clause 4 the nozzle shall be considered to pass the test. No further test is required. Where the test result fails to meet the
33、 requirement of Clause 4 the nozzle shall be retested. Where the test result fails to meet the requirement of Clause 4 the nozzle shall be considered to have failed. No further test is required. Where the test result meets the requirement of Clause 4 the nozzle shall be retested. Where the test resu
34、lt meets the requirement of Clause 4 the nozzle shall be considered to pass the test. No further test is required. Where the test result fails to meet the requirement of Clause 4 the nozzle shall be considered to have failed. No further test is required. The results shall be recorded. BS EN 16321-2:
35、2013EN 16321-2:2013 (E) 6 Figure 1 Flow chart of tests 5.3 Preparation For vapour recovery measurements a measuring adapter shall be mounted over the nozzle onto the vapour spout and connected with a hose to a gas volume meter (see Figure 2 to Figure 4). Air tightness between the nozzle and the gas
36、volume meter shall be ensured. To ensure that the petrol vapour/petrol ratio measurement is not adversely affected by the measurement procedure the hose connecting the measuring adapter to the gas volume meter shall: not exceed 3 m in total length; be protected against kinking; have smooth inner wal
37、ls; have a minimum internal diameter of 10 mm. The gas volume meter for direct determination of the vapour or air volume shall cover a working range of 10 lmin-1to 60 lmin-1and shall have an accuracy of maximum 2 %. The signal output of the gas volume meter shall be connected to the post processing
38、unit (PPU) or equivalent equipment. The calibration factor of the gas volume meter shall be stored in the memory of the PPU. 5.4 Measurement principle with simulated petrol flow (dry test method) 5.4.1 Test procedure The test may be performed on the basis of total volumes, record aVand KV ,or volume
39、 flow, record aQ and KQ according to 5.4.2. BS EN 16321-2:2013EN 16321-2:2013 (E) 7 The vapour recovery system, shown schematically in Figure 2, shall be tested at simulated petrol volume flow rate of (38,0 1,0) l min-1. The simulated flow shall be generated by a PPU or other methods as described by
40、 the supplier. During simulated petrol flow measurement, air is drawn through the gas volume meter (10) and the vapour recovery system. The different properties between air and petrol vapour/air mixture are correlated using the correction factor (k), which shall be given in the certificate of the va
41、pour recovery system. Validation of entered setting into the PPU shall start the petrol flow simulation and the vapour recovery system to provide a corresponding air flow. The measurement time shall be not less than 60 s and up to a maximum of 90 s. The accuracy of the time measurement device shall
42、be at least 0,2 s over 60 s. The result may be read out directly on the PPU or may be evaluated according to 5.4.2. Where no PPU is used the dry test shall be performed and evaluated according to 5.4.2. Key part of the dispenser 1 underground storage tank 6 nozzle part of the dispenser 2 vapour reco
43、very pump part of the dispenser 7 vapour recovery control board part of the dispenser 3 proportional valve part of the dispenser 8 signal line part of the dispenser 4 splitter valve part of the dispenser 5 hose part of the dispenser part of the measuring equipment 9 measuring adapter 13 interface ca
44、ble 10 gas volume meter 14 temperature measuring device 11 signal line 15 air inlet 12 post processing unit Figure 2 Schematic representation of a measuring set-up (example) 5.4.2 Evaluation The petrol vapour/petrol ratio shall be calculated using Formula (1) or Formula (2). Because ambient air is s
45、ucked in during the dry measurement, the calculated air volumetric flow shall be divided by the correction factor as well. BS EN 16321-2:2013EN 16321-2:2013 (E) 8 KVkVRa= (1) where R is the petrol vapour/petrol ratio; aV is the measured air volume, in litres; VKis the simulated volume, in litres; k
46、is the correction factor (as specified in the certificate). KQkQRa= (2) where R is the petrol vapour/petrol ratio; aQ is the calculated air volume flow during the measurement (average value), in lmin-1; KQ is the simulated volume flow, in lmin-1; k is the correction factor (as specified in the certi
47、ficate). 5.5 Measurement principle with real petrol flow (wet test method A) 5.5.1 Test procedure The vapour recovery system, shown schematically in Figure 3, shall be tested with the nozzle fully open. The uninterrupted petrol volume flow rate shall be between 25 l min-1and the maximum petrol volum
48、e flow rate as given in the certificate whilst drawing in ambient air. The measurement time (t) shall be not less than 30 s and up to a maximum of 90 s and shall be recorded. The accuracy of the time measurement device shall be at least 0,2 s over 30 s. During real petrol flow measurement, air is dr
49、awn through the gas volume meter and the vapour recovery system. The different properties between air and petrol vapour/air mixture are correlated using the correction factor (k), which shall be given in the certificate of the vapour recovery system. The result shall be evaluated according to 5.5.2. BS EN 16321-2:2013EN 16321-2:2013 (E) 9 Key part of the dispenser 1 underground storage tank 5 hose part of the dispenser 2 suction/submersible pump 6 nozzle part of the dispenser 3 petrol volume meter part of the dis
