1、BSI Standards PublicationBS EN ISO 13734:2013Natural gas Organiccomponents used as odorants Requirements and testmethods (ISO 13734:2013)BS EN ISO 13734:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO13734:2013. It supersedes BS EN ISO 13734:2001 which
2、is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PTI/15, Natural Gas and Gas Analysis.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a
3、 contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 72971 3ICS 75.060Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the aut
4、hority of theStandards Policy and Strategy Committee on 30 November 2013.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 13734 November 2013 ICS 75.060 Supersedes EN ISO 13734:2000English Version Natural gas - Organic components used as o
5、dorants - Requirements and test methods (ISO 13734:2013) Gaz naturel - Composs organiques utiliss comme odorisants - Exigences et mthodes dessai (ISO 13734:2013) Erdgas - Organische Verbindungen zur Verwendung als Odoriermittel - Anforderungen und Prfverfahren (ISO 13734:2013) This European Standard
6、 was approved by CEN on 12 October 2013. 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 national standard without any alteration. Up-to-date lists and bibliographical references concerning suc
7、h 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 version in any other language made by translation under the responsibility of a CEN member into its own
8、 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, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, G
9、reece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, 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 NORMU
10、NG CEN-CENELEC Management Centre: Avenue Marnix 17, 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 ISO 13734:2013 EBS EN ISO 13734:2013EN ISO 13734:2013 (E) 3 Foreword This document (EN ISO 13734:2013) has bee
11、n prepared by Technical Committee ISO/TC 193 “Natural gas“. 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 May 2014, and conflicting national standards shall be withdrawn at the latest by May 201
12、4. 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 supersedes EN ISO 13734:2000. According to the CEN-CENELEC Internal R
13、egulations, the national standards organizations 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
14、, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 13734:2013 has been approved by CEN as EN ISO 13734:2013 without any modification. BS EN IS
15、O 13734:2013ISO 13734:2013(E) ISO 2013 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Requirements 24.1 Recommendations of an effective odorant . 24.2 Composition of odorants 34.3 Cloud point . 34.4 Phase properties 34.5 E
16、vaporation residue . 34.6 Insoluble matter 34.7 Solubility in water 35 Handling and transport . 46 Tests . 46.1 Test sample . 46.2 Test documentation 46.3 Determination of composition 46.4 Determination of cloud point . 46.5 Determination of phase properties . 46.6 Determination of evaporation resid
17、ue . 46.7 Visual examination for solids or suspended matter . 56.8 Determination of solubility in water 57 Labelling and documentation . 57.1 Labelling . 57.2 Documentation . 6Annex A (informative) Properties of odorants . 7BS EN ISO 13734:2013ISO 13734:2013(E)ForewordISO (the International Organiza
18、tion for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The 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
19、has the right to be represented on that committee. International organizations, governmental and non-governmental, 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.The
20、 procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the ed
21、itorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention 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. Details of any patent rights i
22、dentified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patentsAny trade name used in this document is information given for the convenience of users and does not constitute an endorsement.The committee responsi
23、ble for this document is ISO/TC 193, Natural gas.This second edition cancels and replaces the first edition (ISO 13734:1998), which has been technically revised. It also incorporates the Corrigendum ISO 13734:1998/Corr.1:1999.iv ISO 2013 All rights reservedBS EN ISO 13734:2013ISO 13734:2013(E)Introd
24、uctionProcessed natural gas received from suppliers normally has little or no odour. For safety reasons, natural gas is therefore odorized to permit the detection by smell of the gas at very low concentrations in air.NOTE It is a common requirement that natural gas in air be readily detectable by sm
25、ell at a concentration of 20 % of the lower flammability limit (LFL). The LFL of natural gas is normally taken as the volume fraction in air of 4 % to 5 %. ISO 2013 All rights reserved vBS EN ISO 13734:2013BS EN ISO 13734:2013Natural gas Organic components used as odorants Requirements and test meth
26、ods1 ScopeThis International Standard specifies requirements and test methods for organic compounds suitable for odorization of natural gas and natural gas substitutes for public gas supply, hereafter referred to as odorants.2 Normative referencesThe following documents, in whole or in part, are nor
27、matively 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.ISO 3007:2005, Petroleum products and crude petroleum Determi
28、nation of vapour pressure Reid methodISO 3015:1992, Petroleum products Determination of cloud pointISO 4256:1996, Liquefied petroleum gases Determination of gauge vapour pressure LPG methodISO 4626:1980, Volatile organic liquids Determination of boiling range of organic solvents used as raw material
29、sISO 14532, Natural gas Vocabulary3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 14532 (in particular 3.1 to 3.4) and the following apply.3.1odorizationaddition of odorants, normally intensely smelling organic sulfur compounds, to natural gas (normal
30、ly odourless) to allow the recognition of gas leaks by smell at very low concentration (before a build up to a dangerous gas in air concentration can occur)Note 1 to entry: Adapted from ISO 14532.Note 2 to entry: Natural gas is normally odourless. The addition of an odorant to the gas fed into the d
31、istribution system for safety reasons permits the detection of the gas by smell at very low concentrations.3.2odorantintensely smelling organic chemical or combination of chemicals added to natural gas at low concentration and capable of imparting a characteristic and distinctive (usually disagreeab
32、le) warning odour so gas leaks can be detected at concentrations below their lower flammability limitSOURCE: ISO 14532INTERNATIONAL STANDARD ISO 13734:2013(E) ISO 2013 All rights reserved 1BS EN ISO 13734:2013ISO 13734:2013(E)3.3odour charactertype of sensation of an odourSOURCE: ISO 14532Note 1 to
33、entry: Odour character is a qualitative parameter.3.4odour intensitystrength of odour perceptionSOURCE: ISO 145323.5threshold concentrationconcentration at which an individual has a probability of 0,5 in perceiving the odourNote 1 to entry: To detect an odour does not imply that this odour may be id
34、entified.3.6odour intensity curverelationship between odour intensity and odorant concentration in airNote 1 to entry: The odour intensity can only be determined by the human olfactory organ.3.7diluentorganic liquid, normally consisting of paraffinic hydrocarbons, used to reduce the concentration of
35、 an odorant to a suitable level at which the solution may be injected into the natural gas3.8cloud pointtemperature at which a cloud of crystals first appears in a liquid when it is cooled under specified conditions4 Requirements4.1 Recommendations of an effective odorantGas odorants should meet the
36、 following general recommendations:a) The gas odorant should have a strong odour at very low concentration.b) The odour character of the odorant needs to be unpleasant, distinctive and not confusable with other frequently occurring odours so that it is unmistakably associated with a gas leak.c) The
37、odour character should be the same at different dilutions of natural gas with air.d) The odorant should be sufficiently stable during storage and when mixed with natural gas.e) The volatility of the odorant should be high enough so that the odorant does not appreciably condense under the conditions
38、(temperature and pressure) existing in the pipeline system.f) Evaporation of the gas odorant should not appreciably leave residues.g) The odorant should be useable at low temperatures, when required.h) The combustion of the odorant should not leave significant solid deposits.i) The addition of the o
39、dorant to natural gas should not make the resulting gas harmful.2 ISO 2013 All rights reservedBS EN ISO 13734:2013ISO 13734:2013(E)These general recommendations should be assessed against the specific conditions of use of the odorant (conditions of the natural gas transportation grid, odorization in
40、stallation, type of odorant, composition of the gas).Experience in many countries has shown that these basic requirements are best met by organic sulfur compounds - sulfides (thioethers) and mercaptans (thiols) - with boiling points below 130 C. Since primary mercaptans are easily oxidized to disulf
41、ides which have a much lower odour intensity, mercaptan-based odorants need to predominantly contain secondary and tertiary mercaptans.While it has been established that the above sulfur compounds fulfil the basic requirements listed above under a) to i), other, non-sulfurous odorants have been deve
42、loped and are available.4.2 Composition of odorantsThe mass fraction of the declared chemical product in the undiluted odorant shall be at least 95 %. The composition of the odorant, and where applicable the dilution range, shall be declared by the producer or distributor. It shall be stable over th
43、e maximum shelf time as declared by the manufacturer.In sulfur containing odorants, the mass fraction of sulfides (thioethers) or secondary or tertiary mercaptans (thiols) shall be at least 80 %. Primary mercaptans are more easily oxidized than secondary or tertiary mercaptans.For non-sulfurous odor
44、ants based on acrylates, care shall be taken e.g. by use of an appropriate additive to avoid polymerisation.4.3 Cloud pointThe cloud point of the undried odorant, to be determined in accordance with 6.4, shall be below -30 C.4.4 Phase properties4.4.1 Boiling pointThe boiling point of the components
45、of the odorants and diluent, measured in accordance with 6.5, shall not be higher than 130 C.4.4.2 Vapour pressure curveThe vapour pressure curve of the odorant and eventually the diluent shall be given. It shall be determined in accordance with 6.5.4.5 Evaporation residueThe mass fraction of the ev
46、aporation residue, to be determined in accordance with 6.6, shall be less than 0,2 %.4.6 Insoluble matterOdorants shall not contain any visible insoluble matter, to be determined in accordance with 6.7.4.7 Solubility in waterWhen the odorant is added to water in the way specified in 6.8, less than 2
47、 % by volume of the odorant shall be soluble. ISO 2013 All rights reserved 3BS EN ISO 13734:2013ISO 13734:2013(E)5 Handling and transportWhen delivered, odorants shall be accompanied by a safety data sheet conforming to the requirements of the country of use.Appropriate personnel protective equipmen
48、t, as specified in the safety data sheet, shall be used when handling odorants The safety data sheet shall also give information about safe handling, transport and storage.6 Tests6.1 Test sampleFor type approval and control tests, the producer or supplier shall deliver at least 0,5 l of a representa
49、tive sample of the liquid odorant to a qualified test laboratory, acceptable to both producer and purchaser.6.2 Test documentationThe following documentation shall be provided by the producer or supplier: a material safety data sheet (MSDS) conforming to the requirements of the country of use; complete details of the composition of the odorant.6.3 Determination of compositionThe composition of the odorant shall be determined by gas-chromatographic analysis. Any gas-chromatographic method giving sufficient component separation
