1、BS ISO26142:2010ICS 71.020; 71.100.20NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDHydrogen detectionapparatus Stationary applicationsThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 30 June2010 BSI 2010ISBN
2、 978 0 580 64572 3Amendments/corrigenda issued since publicationDate CommentsBS ISO 26142:2010National forewordThis British Standard is the UK implementation of ISO 26142:2010.The UK participation in its preparation was entrusted to TechnicalCommittee PVE/3/8, Gas containers - Hydrogen technologies.
3、A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom leg
4、al obligations.BS ISO 26142:2010Reference numberISO 26142:2010(E)ISO 2010INTERNATIONAL STANDARD ISO26142First edition2010-06-01Hydrogen detection apparatus Stationary applications Dtecteurs dhydrogne Applications fixes BS ISO 26142:2010ISO 26142:2010(E) PDF disclaimer This PDF file may contain embed
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7、ere optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2010 All rights res
8、erved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the reque
9、ster. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedBS ISO 26142:2010ISO 26142:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword .v Intro
10、ductionvi 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 General requirements .4 4.1 Construction 4 4.1.1 General .4 4.1.2 Enclosure .4 4.1.3 Measuring range4 4.1.4 Alarm system .4 4.1.5 Indicators5 4.1.6 Adjustments.5 4.1.7 Software-controlled hydrogen detection apparatus6 4.1.8 Reli
11、ability7 4.2 Labelling and marking 8 4.3 Instruction manual 8 4.4 Vibration .9 5 Performance requirements.9 6 Tests .9 6.1 General requirements for tests 9 6.1.1 Number of samples .9 6.1.2 Sequence of tests9 6.1.3 Preparation of the hydrogen detection apparatus before testing10 6.2 Test equipment 10
12、 6.3 Normal test conditions10 6.3.1 Temperature.10 6.3.2 Pressure .10 6.3.3 Humidity .10 6.3.4 Voltage10 6.3.5 Orientation .10 6.4 Test methods .11 6.4.1 General .11 6.4.2 Standard response test.11 6.4.3 Measuring range and calibration .11 6.4.4 Stability.12 6.4.5 Alarm set point(s) 13 6.4.6 Tempera
13、ture.13 6.4.7 Pressure .14 6.4.8 Humidity .14 6.4.9 Vibration .14 6.4.10 Orientation .15 6.4.11 Flow rate for aspirated apparatus16 6.4.12 Air velocity .16 6.4.13 Time of response and time of recovery 17 6.4.14 Selectivity.17 6.4.15 Poisoning .17 6.4.16 Operation above the measuring range18 6.4.17 P
14、ower supply variations .18 BS ISO 26142:2010ISO 26142:2010(E) iv ISO 2010 All rights reserved6.4.18 Power supply interruptions, voltage transients and step changes of voltage .19 6.4.19 Warm-up time after restart19 6.4.20 Electromagnetic immunity19 6.4.21 Field calibration kit 20 Annex A (informativ
15、e) Chamber test method .21 Annex B (informative) Flow-through test method24 Bibliography 27 BS ISO 26142:2010ISO 26142:2010(E) ISO 2010 All rights reserved vForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). T
16、he work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-go
17、vernmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
18、 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a v
19、ote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 26142 was prepared by Technical Committee ISO/TC 197, Hydrogen technologies. BS ISO 26142:20
20、10ISO 26142:2010(E) vi ISO 2010 All rights reservedIntroduction Over the course of several years, international efforts have been initiated for the development of necessary regulations, codes and standards required for the introduction of hydrogen energy systems in consumer environments. Such codes
21、and standards usually require a safety system to detect hydrogen concentrations before a fraction of the flammable or explosive limit is reached, in order to allow for purging, shut-off, and similar safety operations. This International Standard provides requirements for stationary hydrogen detectio
22、n apparatus, covering both performance requirements and test methods. This International Standard is intended to cover situations where the user desires the ability to detect hydrogen leaks and monitor hydrogen concentrations relevant to safety. This International Standard is primarily intended for
23、hydrogen detection apparatus at vehicle refuelling stations, where a high level of safety management is required. This sector has an immediate need for this standard and is expected to be the main application for such apparatus, but this standard can also be applied to other stationary installations
24、 where the detection of hydrogen is required. This International Standard is not intended to exclude any specific technologies that meet the performance requirements herein. This International Standard contains the important quantitative and technical specifications against the danger of hydrogen le
25、akage. This standard will promote international cooperation under easy-to-understand requirements, by leading to widespread use of hydrogen energy. Benefits to be gained by the implementation of this International Standard include using the performance requirements in the standard to overcome safety
26、 concerns and aiding in development of the hydrogen fuel infrastructure. In this International Standard, attention is concentrated on specific requirements related to performance and testing of hydrogen detection apparatus, such as a specific detection range for single and multiple safety systems, s
27、electivity, poisoning, fast response time, and hydrogen-specific test methods needed by the hydrogen energy industry. This International Standard focuses primarily on stationary hydrogen technologies whose main purpose is to produce, store and handle hydrogen, and not on systems that might generate
28、hydrogen as an undesirable by-product. The purpose of a hydrogen detection apparatus according to this standard is to mitigate risk from unintended hydrogen releases within a wide range of hydrogen concentrations including those exceeding the lower flammability limit. Hydrogen-related facilities mig
29、ht be required to have the ability to detect hydrogen concentrations before a specified concentration of hydrogen or fraction of flammable limit is reached, in order to allow for single and/or multilevel safety operations, such as nitrogen purging or ventilation and/or system shut-off; or there migh
30、t be a desire to detect hydrogen concentrations above the lower flammability limit, in order to monitor concentrations following a release. The hydrogen detection apparatus described in this International Standard can detect the hydrogen leak concentration at multiple points determined by users to r
31、ealize such multilevel safety operations. BS ISO 26142:2010INTERNATIONAL STANDARD ISO 26142:2010(E) ISO 2010 All rights reserved 1Hydrogen detection apparatus Stationary applications 1 Scope This International Standard defines the performance requirements and test methods of hydrogen detection appar
32、atus that is designed to measure and monitor hydrogen concentrations in stationary applications. The provisions in this International Standard cover the hydrogen detection apparatus used to achieve the single and/or multilevel safety operations, such as nitrogen purging or ventilation and/or system
33、shut-off corresponding to the hydrogen concentration. The requirements applicable to the overall safety system, as well as the installation requirements of such apparatus, are excluded. This International Standard sets out only the requirements applicable to a product standard for hydrogen detection
34、 apparatus, such as precision, response time, stability, measuring range, selectivity and poisoning. This International Standard is intended to be used for certification purposes. 2 Normative references The following referenced documents are indispensable for the application of this document. For da
35、ted references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 14687-1:1999, Hydrogen fuel Product specification Part 1: All applications except proton exchange membrane (PEM) fuel cell for road vehicles I
36、SO 14687-1:1999/Cor.2:2008, Hydrogen fuel Product specification Part 1: All applications except proton exchange membrane (PEM) fuel cell for road vehicles Technical Corrigendum 2 IEC 61000-4-1, Electromagnetic compatibility (EMC) Part 4-1: Testing and measurement techniques Overview of IEC 61000-4 s
37、eries IEC 61000-4-3, Electromagnetic compatibility (EMC) Part 4-3: Testing and measurement techniques Radiated, radio-frequency, electromagnetic field immunity test IEC 61000-4-4, Electromagnetic compatibility (EMC) Part 4-4: Testing and measurement techniques Electrical fast transient/burst immunit
38、y test IEC 60079-0:2008, Explosive atmospheres Part 0: Equipment General requirements IEC 60079 (all parts), Explosive atmospheres 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 alarm set point fixed or adjustable setting of the hydrogen det
39、ection apparatus that is intended to select the hydrogen volume fraction at which an indication, an alarm or another output function will automatically be activated BS ISO 26142:2010ISO 26142:2010(E) 2 ISO 2010 All rights reserved3.2 ambient air normal atmosphere surrounding the hydrogen detection a
40、pparatus 3.3 aspirated hydrogen detection apparatus hydrogen detection apparatus that samples the gas to be detected by introducing it to the hydrogen sensor(s) in a forced manner (e.g. use of a gas sampling pump or induction of a flow through a pressure differential) 3.4 clean air air that is free
41、of flammable gases, interfering or contaminating substances, and dust 3.5 control unit part of hydrogen detection apparatus that is commonly referred to as the apparatus body and which excludes its remote sensor(s) and connections, if any 3.6 data collecting interval time interval between the time w
42、hen an indication data is collected and the time when the next indication data is corrected 3.7 diffusion chamber chamber that can be sealed with controlled conditions of temperature, humidity and test-gas volume fraction, used for performing the test on the hydrogen detection apparatus 3.8 fault si
43、gnal audible, visible or other type of signal different from the alarm signal, providing, directly or indirectly, a warning or an indication that the hydrogen detection apparatus is not working satisfactorily 3.9 final indication indication given by the hydrogen detection apparatus after stabilizati
44、on 3.10 hydrogen detection apparatus assembly with an integrated or a remote hydrogen sensor that is intended to detect and measure the hydrogen volume fraction over a declared measuring range NOTE 1 The hydrogen detection apparatus may be provided with a single or multiple alarm set points. NOTE 2
45、The hydrogen detection apparatus may include one or more built-in alarm indications, output contacts for alarm and/or electrical signals for alarm. 3.11 hydrogen sensing element component that provides a measurable, continuously changing physical quantity in correlation to the surrounding hydrogen v
46、olume fraction 3.12 hydrogen sensor assembly, which contains one or more hydrogen sensing elements and may also contain circuit components associated with the hydrogen sensing elements, that provides a continuously changing physical quantity or signal in correlation to the physical quantity provided
47、 by the hydrogen sensing element(s) BS ISO 26142:2010ISO 26142:2010(E) ISO 2010 All rights reserved 33.13 hydrogen volume fraction hydrogen content expressed as the ratio of the volume of hydrogen to the total volume of all components in the gas mixture under standard conditions of temperature and p
48、ressure of 20 C and 101,325 kPa 3.14 interferant any substance that affects the sensitivity of a hydrogen sensing element by contacting or adhering to it 3.15 latching alarm alarm that, once activated, requires deliberate manual action to be deactivated 3.16 measuring range range, defined by the low
49、est and highest hydrogen volume fractions, within which a hydrogen detection apparatus can measure hydrogen volume fractions within the specified accuracy 3.17 multi-level detection continuous detection and monitoring of hydrogen volume fraction with multiple alarm set points 3.18 nominal supply voltage voltage corresponding to the manufacturer-recommended operating voltage for the hydrogen detection apparatus 3.19 poisoning phenomenon caused by any interferant that permanently affects the sensitivity of a hydrogen
