Natural gas and biomethane for use in transport and biomethane for injection in the natural gas network - Part 1: Specifications for biomethane for injection in the natural gas network

This European Standard specifies the requirements and test methods for biomethane at the point of
entry into natural gas networks.

Erdgas und Biomethan zur Verwendung im Transportwesen und Biomethan zur Einspeisung ins Erdgasnetz - Teil 1: Festlegungen für Biomethan zur Einspeisung ins Erdgasnetz

Diese Europäische Norm legt die Anforderungen an und Prüfverfahren für Biomethan an der Einspeisestelle in Erdgasnetze fest.

Gaz naturel et biométhane pour utilisation dans le transport et biométhane pour injection dans les réseaux de gaz naturel - Partie 1 - Spécifications du biométhane pour injection dans les réseaux de gaz naturel

La présente Norme européenne spécifie les exigences et méthodes d'essai pour le biométhane au point d'entrée dans les réseaux de gaz naturel.

Zemeljski plin in biometan za uporabo v prometu in biometan za dodajanje v omrežje zemeljskega plina - 1. del: Specifikacije za biometan za dodajanje v omrežje zemeljskega plina

Ta evropski standard določa zahteve in preskusne metode za biometan ob vstopu v omrežje zemeljskega plina.

General Information

Status
Published
Public Enquiry End Date
04-Aug-2016
Publication Date
08-Dec-2016
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
02-Nov-2016
Due Date
07-Jan-2017
Completion Date
09-Dec-2016

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Zemeljski plin in biometan za uporabo v prometu in biometan za dodajanje v omrežje zemeljskega plina - 1. del: Specifikacije za biometan za dodajanje v omrežje zemeljskega plinaErdgas und Biomethan zur Verwendung im Transportwesen und Biomethan zur Einspeisung ins Erdgasnetz - Teil 1: Festlegungen für Biomethan zur Einspeisung ins ErdgasnetzGaz naturel et biométhane pour utilisation dans le transport et biométhane pour injection dans les réseaux de gaz naturel - Partie 1 - Spécifications du biométhane pour injection dans les réseaux de gaz naturelNatural gas and biomethane for use in transport and biomethane for injection in the natural gas network - Part 1: Specifications for biomethane for injection in the natural gas network75.060Zemeljski plinNatural gas27.190Biološki viri in drugi alternativni viri energijeBiological sources and alternative sources of energyICS:Ta slovenski standard je istoveten z:EN 16723-1:2016SIST EN 16723-1:2017en,fr,de01-januar-2017SIST EN 16723-1:2017SLOVENSKI

STANDARD
SIST EN 16723-1:2017
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16723-1
November
t r s x ICS
t yä s { r English Version

Natural gas and biomethane for use in transport and biomethane for injection in the natural gas network æ Part

sã Specifications for biomethane for injection in the natural gas network Gaz naturel et biométhane pour utilisation dans le transport et biométhane pour injection dans les réseaux de gaz naturel æ Partie

s æ Spécifications du biométhane pour injection dans les réseaux de gaz naturel

Erdgas und Biomethan zur Verwendung im Transportwesen und Biomethan zur Einspeisung ins Erdgasnetz æ Teil

sã Festlegungen für Biomethan zur Einspeisung ins Erdgasnetz This European Standard was approved by CEN on

s y September
t r s xä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey andUnited Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels

t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

s x y t uæ sã t r s x ESIST EN 16723-1:2017

EN 16723-1:2016 (E) 2 Contents Page European foreword ....................................................................................................................................................... 3 Introduction .................................................................................................................................................................... 4 1 Scope .................................................................................................................................................................... 6 2 Normative references .................................................................................................................................... 6 3 Terms and definitions ................................................................................................................................... 6 4 Parameters and test methods ..................................................................................................................... 8 4.1 General ................................................................................................................................................................ 8 4.2 Standard reference conditions ................................................................................................................... 8 4.3 Applicable requirements and test methods for biomethane for injection in the natural gas network ....................................................................................................................................... 8 5 Sampling .......................................................................................................................................................... 10 Annex A (informative)

Parameters ..................................................................................................................... 11 A.1 Total silicon .................................................................................................................................................... 11 A.2 Hydrogen ......................................................................................................................................................... 11 A.3 Compressor oil, dust impurities and biogenic materials .............................................................. 11 A.4 Water and hydrocarbon dew point temperature ............................................................................. 12 Annex B (informative)

Odorization and sulfur ............................................................................................... 13 B.1 CEN/TC 408 approach ................................................................................................................................ 13 B.2 General ............................................................................................................................................................. 13 B.3 Total sulfur from Odorants ....................................................................................................................... 13 Annex C (informative)

Examples of different compliance schemes........................................................ 14 C.1 General ............................................................................................................................................................. 14 C.2 General prescriptions ................................................................................................................................. 14 C.2.1 Permit conditions ......................................................................................................................................... 14 C.2.2 Upgrading plants .......................................................................................................................................... 14 C.2.3 Control and monitoring ............................................................................................................................. 14 C.2.4 Measurement ................................................................................................................................................. 15 C.2.5 Risk assessment ............................................................................................................................................ 15 C.3 Common practices ....................................................................................................................................... 15 Annex D (informative)

A-deviations ................................................................................................................... 18 Bibliography ................................................................................................................................................................. 19

SIST EN 16723-1:2017
EN 16723-1:2016 (E) 3

European foreword This document (EN 16723-1:2016) has been prepared by Technical Committee CEN/TC 408 “Natural gas and biomethane for use in transport and biomethane foe injection in the natural gas network”, 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 May 2017, and conflicting national standards shall be withdrawn at the latest by May 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. EN 16723 consists of the following parts, under the general title “Natural gas and biomethane for use in transport and biomethane for injection in the natural gas network”: — Part 1: Specifications for biomethane for injection in the natural gas network — Part 2: Automotive fuel specifications According to the 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 16723-1:2017

EN 16723-1:2016 (E) 4 Introduction This European Standard was prepared by CEN/TC 408 in response to the European Commission standardization mandate M/475. The Mandate asks for the development of a set of quality specifications for biomethane to be used as a fuel for vehicle engines and to be injected in natural gas pipelines (network). However, the scope of the standard was widened according to BT decision C109/2012 that redefined the scope of CEN/TC 408: “Standardization of specifications for natural gas and biomethane as vehicle fuel and of biomethane for injection in the natural gas grid, including any necessary related methods of analysis and testing. Production process, source and the origin of the source are excluded”. NOTE The CEN Technical Board (CEN/BT) is responsible to coordinate the work between technical bodies in order to achieve a coherent set of standards and to avoid overlaps. One of the aims of European policy in the field of energy is to increase the security of energy supply in the EU as well as to contribute to reduce the emission of greenhouse gases accepted by the EU at Kyoto. In this context, a special focus is given to the development and use of energy from renewable sources. Directive 2009/28/EC on the promotion of the use of energy from renewable sources and amending and subsequently repealing Directives 2001/77/EC and 2003/30/EC stipulates clear aims regarding the percentage of renewables in EU energy consumption and states the related need to support the integration of energy from renewable sources into the energy networks including the establishment of appropriate technical rules in line with Directive 2003/55/EC (Article 6) replaced by 2009/73/EC (Article 8) for the realization of the competitive single European Gas Market and the technical interoperability of gas networks, (network connection, gas quality, gas odorization and gas pressure requirements). Supporting the EU policy and therefore the maximization of the production and use of biomethane and considering the absence of standards the European Commission DG ENER has included the injection of biomethane in natural gas pipelines in Mandate M/475. Biomethane in this context can be produced from biological (fermentation, digestion …) and thermochemical processing of biomass and is appropriate to be used as a blending component to natural gas. A special focus is given to the development and use of energy from renewable sources of biological and non-biological origin. Other gases complying with this standard can be injected. Figure 1 provides a visual representation of some applications of biomethane. Mandate M/475 indicates that the requirements for natural gas quality for injection in the natural gas network are developed by CEN/TC 234 in answer to Mandate M/400 on natural gas quality. CEN/TC 408 should consider the work of the pending mandate M/400 on gas quality, and should refer to the parameters as defined and specified in EN 16726. This standard should exclude the definition of any parameters or substances that are addressed in EN 16726. However, it may specify more strict limits for parameters or substances unique to biomethane if deemed technically necessary. If needed, additional parameters or substances should be defined. SIST EN 16723-1:2017

EN 16723-1:2016 (E) 5

Key 1 biogas from digestion or thermos chemical process 7 non-grid sourced natural gas 2 upgrading 8 local dedicated infrastructure 3 injection into the gas grid 9 automotive use 4 natural gas grid 10 domestic and industrial use 5 conditioning 11 Part 1: grid specification 6 refuelling station 12 Part 2: automotive specification Figure 1 — Representation of some flows and uses of biomethane and natural gas SIST EN 16723-1:2017

EN 16723-1:2016 (E) 6 1 Scope This European Standard specifies the requirements and test methods for biomethane at the point of entry into natural gas networks. 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 amendments) applies. EN 16726:2015, Gas infrastructure - Quality of gas - Group H EN ISO 10715:2000, Natural gas - Sampling guidelines (ISO 10715:1997) EN ISO 13443:2005, Natural gas - Standard reference conditions (ISO 13443:1996 including Corrigendum 1:1997) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 16726:2015 and the following apply. 3.1 biogas gas, comprising principally methane and carbon dioxide, obtained from the anaerobic digestion of biomass 3.2 biomass biological material from living, or recently living organisms, typically this may be plants or plant-derived materials 3.3 biomethane gas comprising principally methane, obtained from either upgrading of biogas or methanation of bio-syngas 3.4 bio-syngas gas, comprising principally carbon monoxide and hydrogen, obtained from gasification of biomass 3.5 gas infrastructure pipeline systems including pipework, underground gas storages and their associated stations or plants for the transmission and distribution of gas 3.6 hydrocarbon dew point temperature temperature above which no condensation of hydrocarbons occurs at a specified pressure 3.7 lower heating value amount of heat that would be released by the complete combustion with oxygen of a specified quantity of gas, in such a way that the pressure at which the reaction takes place remains constant, and all the products of combustion are returned to the same specified temperature as that of the reactants, all of these products being in the gaseous state SIST EN 16723-1:2017

EN 16723-1:2016 (E) 7

3.8 methane number MN rating indicating the knocking characteristics of a gaseous fuel Note 1 to entry: MN has a similar use as the octane number for petrol. Note 2 to entry: MN expresses the volume percentage of methane in a methane/hydrogen mixture which, in a test engine under standard conditions, has the same tendency to knock as the gaseous fuel to be examined. 3.9 natural gas complex gaseous mixture of hydrocarbons, primarily methane, but generally includes ethane, propane and higher hydrocarbons, and some non-combustible gases such as nitrogen and carbon dioxide Note 1 to entry: Natural gas can also contain components or contaminants such as sulfur compounds and/or other chemical species. 3.10 natural gas network either transmission network or local distribution system 3.11 non-grid sourced natural gas natural gas non coming from the natural gas network 3.12 odorization addition of odorants to gas (normally odourless) to allow gas leaks to be recognized by smell at trace levels (before accumulating to dangerous concentrations in air) 3.13 syngas gas, comprising principally of carbon monoxide and hydrogen, obtained from gasification of fossil fuel 3.14 upgrading of biogas removal of carbon dioxide and contaminants from biogas 3.15 water dew point temperature temperature above which no condensation of water occurs at a specified pressure 3.16 Wobbe index volumetric-basis heating value, at specified reference conditions, divided by the square root of the relative density at the same specified metering reference conditions SIST EN 16723-1:2017

EN 16723-1:2016 (E) 8 4 Parameters and test methods 4.1 General This section deals with the various parameters for which requirements are given. Natural gas, biomethane and blends of those intended for injection into natural gas networks shall be free from any constituents or impurities other than the ones described in this standard, to the extent that it cannot be transported, stored or utilized without quality adjustment or treatment. In the case of such other constituents and/or impurities, it may be necessary to obtain an approval from the competent and legitimate authority to define the acceptable risk in the territory of the injection point. 4.2 Standard reference conditions Unless stated otherwise, all volumes are for the real dry gas at ISO Standard Reference conditions of 15 °C and 101,325 kPa. Unless stated otherwise, all calorific values and Wobbe index are for the real dry gas at ISO Standard Reference conditions of: — 15 °C (combustion); — and 15 °C and 101,325 kPa (metering). In assessing compliance with this European Standard, parameters should be determined directly at ISO standard reference conditions. If the properties are only available at other reference conditions and the actual gas composition is not known then conversion to ISO standard reference conditions shall be carried out using the procedure described in EN ISO 13443. 4.3 Applicable requirements and test methods for biomethane for injection in the natural gas network Biomethane shall meet the requirements of EN 16726 for common parameters and Table 1 only for parameters specific to biomethane. Health criteria assessment for biomethanes is complex and dependent upon the biogas feedstock and upgrading and purification process. As a result, it is recommended that contaminants to be specified and limits to be applied are assessed at national level using an appropriate methodology. An example of such a methodology is provided in CEN/TR, Proposed limit values for contaminants in biomethane based on health assessment criteria (WI 00408007)1). Table 1 provides common requirements for injection into H and L gas systems. For injection into L gas systems, national requirements for Wobbe index, relative density, and CO2 shall be applied when appropriate.

1) This CEN/TR is currently in development. SIST EN 16723-1:2017
EN 16723-1:2016 (E) 9

Table 1 — Applicable common requirements and test methods for biomethane at the point of entry into H gas and L gas networks Parameter Unit Limit valuesa Test method (Informative) Min Max Total volatile silicon (as Si) mgSi/m3

0,3 to 1b EN ISO 16017-1:2000 TDS-GC-MS Compressor oil
ISO 8573-2:2007 Dust impurities
ISO 8573-4:2001 Chlorinated compounds
- d, e EN 1911:2010 Fluorinated compounds
d NF X43–304:2007 ISO 15713:2006 CO % mol _ 0,1f EN ISO 6974- series NH3 mg/m3
10 NEN 2826:1999 or
VDI 3496 Blatt 1:1982–04 NF X43–303:2011 Amine mg/m3

10 VDI 2467 Blatt 2:1991–08 a Limit values are absolute, the number of the decimal places shall not imply the accuracy of the test methods. b A range of limit

...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Zemeljski plin in biometan za uporabo v prometu in biometan za dodajanje v omrežje zemeljskega plina - 1. del: Specifikacije za biometan za dodajanje v omrežje zemeljskega plinaErdgas und Biomethan zur Verwendung im Transportwesen und Biomethan zur Einspeisung ins Erdgasnetz - Teil 1: Festlegungen für Biomethan zur Einspeisung ins ErdgasnetzGaz naturel et biométhane pour utilisation dans le transport et biométhane pour injection dans les réseaux de gaz naturel - Partie 1 - Spécifications du biométhane pour injection dans les réseaux de gaz naturelNatural gas and biomethane for use in transport and biomethane for injection in the natural gas network - Part 1: Specifications for biomethane for injection in the natural gas network75.060Zemeljski plinNatural gas27.190Biološki viri in drugi alternativni viri energijeBiological sources and alternative sources of energyICS:Ta slovenski standard je istoveten z:FprEN 16723-1kSIST FprEN 16723-1:2016en,fr,de01-julij-2016kSIST FprEN 16723-1:2016SLOVENSKI

STANDARD
kSIST FprEN 16723-1:2016
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
FprEN 16723-1
June
t r s x ICS
t yä s { r English Version

Natural gas and biomethane for use in transport and biomethane for injection in the natural gas network æ Part

sã Specifications for biomethane for injection in the natural gas network Gaz naturel et biométhane pour utilisation dans le transport et biométhane pour injection dans les réseaux de gaz naturel æ Partie

s æ Spécifications du biométhane pour injection dans les réseaux de gaz naturel

Erdgas und Biomethan zur Verwendung im Transportwesen und Biomethan zur Einspeisung ins Erdgasnetz æ Teil

sã Festlegungen für Biomethan zur Einspeisung ins Erdgasnetz This draft European Standard is submitted to CEN members for formal voteä It has been drawn up by the Technical Committee

If this draft becomes a European Standardá CEN members are bounwhich stipulate the conditions for giving this European Standard the status of a national standard without any alterationä

This draft European Standard was established by CEN in three ofer language made by translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey andUnited Kingdomä

Recipients of this draft are invited to submitá with their commentsá notification of any relevant patent rights of which they are aware and to provide supporting documentationä

Warning ã This document is not a European Standardä It is distributed for review and commentsä It is subject to change without notice and shall not be referred to as a European Standardä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels

t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä FprEN

s x y t uæ sã t r s x EkSIST FprEN 16723-1:2016
FprEN 16723-1:2016 (E) 2

Contents Page European foreword ....................................................................................................................................................... 3 Introduction .................................................................................................................................................................... 4 1 Scope .................................................................................................................................................................... 6 2 Normative references .................................................................................................................................... 6 3 Terms and definitions ................................................................................................................................... 6 4 Parameters and test methods ..................................................................................................................... 8 4.1 General ................................................................................................................................................................ 8 4.2 Standard reference conditions ................................................................................................................... 8 4.3 Applicable requirements and test methods for biomethane for injection in the natural gas network ....................................................................................................................................... 8 5 Sampling .......................................................................................................................................................... 10 Annex A (informative)

Parameters ..................................................................................................................... 11 A.1 Total silicon .................................................................................................................................................... 11 A.2 Hydrogen ......................................................................................................................................................... 11 A.3 Compressor oil, dust impurities and biogenic materials .............................................................. 11 A.4 Water and hydrocarbon dew point temperature ............................................................................. 12 Annex B (informative)

Odorization and sulfur ............................................................................................... 13 B.1 CEN/TC 408 approach ................................................................................................................................ 13 B.2 General ............................................................................................................................................................. 13 B.3 Total sulfur from Odorants ....................................................................................................................... 13 Annex C (informative)

Examples of different compliance schemes........................................................ 14 C.1 General ............................................................................................................................................................. 14 C.2 General prescriptions ................................................................................................................................. 14 C.2.1 Permit conditions ......................................................................................................................................... 14 C.2.2 Upgrading plants .......................................................................................................................................... 14 C.2.3 Control and monitoring ............................................................................................................................. 14 C.2.4 Measurement ................................................................................................................................................. 15 C.2.5 Risk assessment ............................................................................................................................................ 15 C.3 Common practices ....................................................................................................................................... 15 Annex D (informative)

A-deviations ................................................................................................................... 18 Bibliography ................................................................................................................................................................. 19

kSIST FprEN 16723-1:2016
FprEN 16723-1:2016 (E)

European foreword This document (FprEN 16723-1:2016) has been prepared by Technical Committee CEN/TC 408 “Natural gas and biomethane for use in transport and biomethane foe injection in the natural gas network”, the secretariat of which is held by AFNOR. This document is currently submitted to the Formal Vote. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. EN 16723 consists of the following parts, under the general title “Natural gas and biomethane for use in transport and biomethane for injection in the natural gas network”: — Part 1: Specifications for biomethane for injection in the natural gas network — Part 2: Automotive fuel specifications kSIST FprEN 16723-1:2016

FprEN 16723-1:2016 (E) 4

Introduction This European Standard was prepared by CEN/TC 408 in response to the European Commission standardization mandate M/475. The Mandate asks for the development of a set of quality specifications for biomethane to be used as a fuel for vehicle engines and to be injected in natural gas pipelines (network). However, the scope of the standard was widened according to BT decision C109/2012 that redefined the scope of CEN/TC 408: “Standardization of specifications for natural gas and biomethane as vehicle fuel and of biomethane for injection in the natural gas grid, including any necessary related methods of analysis and testing. Production process, source and the origin of the source are excluded”. NOTE The CEN Technical Board (CEN/BT) is responsible to coordinate the work between technical bodies in order to achieve a coherent set of standards and to avoid overlaps. One of the aims of European policy in the field of energy is to increase the security of energy supply in the EU as well as to contribute to reduce the emission of greenhouse gases accepted by the EU at Kyoto. In this context, a special focus is given to the development and use of energy from renewable sources. Directive 2009/28/EC on the promotion of the use of energy from renewable sources and amending and subsequently repealing Directives 2001/77/EC and 2003/30/EC stipulates clear aims regarding the percentage of renewables in EU energy consumption and states the related need to support the integration of energy from renewable sources into the energy networks including the establishment of appropriate technical rules in line with Directive 2003/55/EC (Article 6) replaced by 2009/73/EC (Article 8) for the realization of the competitive single European Gas Market and the technical interoperability of gas networks, (network connection, gas quality, gas odorization and gas pressure requirements). Supporting the EU policy and therefore the maximization of the production and use of biomethane and considering the absence of standards the European Commission DG ENER has included the injection of biomethane in natural gas pipelines in Mandate M/475. Biomethane in this context can be produced from biological (fermentation, digestion …) and thermochemical processing of biomass and is appropriate to be used as a blending component to natural gas. A special focus is given to the development and use of energy from renewable sources of biological and non-biological origin. Other gases complying with this standard can be injected. Figure 1 provides a visual representation of some applications of biomethane. Mandate M/475 indicates that the requirements for natural gas quality for injection in the natural gas network are developed by CEN/TC 234 in answer to Mandate M/400 on natural gas quality. CEN/TC 408 should consider the work of the pending mandate M/400 on gas quality, and should refer to the parameters as defined and specified in EN 16726. This standard should exclude the definition of any parameters or substances that are addressed in EN 16726. However, it may specify more strict limits for parameters or substances unique to biomethane if deemed technically necessary. If needed, additional parameters or substances should be defined. kSIST FprEN 16723-1:2016

FprEN 16723-1:2016 (E)

Key 1 biogas from digestion or thermos chemical process 7 non-grid sourced natural gas 2 upgrading 8 local dedicated infrastructure 3 injection into the gas grid 9 automotive use 4 natural gas grid 10 domestic and industrial use 5 conditioning 11 Part 1: grid specification 6 refuelling station 12 Part 2: automotive specification Figure 1 — Representation of some flows and uses of biomethane and natural gas kSIST FprEN 16723-1:2016

FprEN 16723-1:2016 (E) 6

1 Scope This European Standard specifies the requirements and test methods for biomethane at the point of entry into natural gas networks. 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 amendments) applies.

EN 16726:2015, Gas infrastructure - Quality of gas - Group H EN ISO 10715:2000, Natural gas - Sampling guidelines (ISO 10715:1997) EN ISO 13443:2005, Natural gas - Standard reference conditions (ISO 13443:1996 including Corrigendum 1:1997) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 16726:2015 and the following apply. 3.1 biogas gas, comprising principally methane and carbon dioxide, obtained from the anaerobic digestion of biomass 3.2 biomass biological material from living, or recently living organisms, typically this may be plants or plant-derived materials 3.3 biomethane gas comprising principally methane, obtained from either upgrading of biogas or methanation of bio-syngas 3.4 bio-syngas gas, comprising principally carbon monoxide and hydrogen, obtained from gasification of biomass 3.5 gas infrastructure pipeline systems including pipework, underground gas storages and their associated stations or plants for the transmission and distribution of gas 3.6 hydrocarbon dew point temperature temperature above which no condensation of hydrocarbons occurs at a specified pressure kSIST FprEN 16723-1:2016

FprEN 16723-1:2016 (E)

3.7 lower heating value amount of heat that would be released by the complete combustion with oxygen of a specified quantity of gas, in such a way that the pressure at which the reaction takes place remains constant, and all the products of combustion are returned to the same specified temperature as that of the reactants, all of these products being in the gaseous state 3.8 methane number

MN rating indicating the knocking characteristics of a gaseous fuel Note 1 to entry: MN has a similar use as the octane number for petrol. Note 2 to entry: MN expresses the volume percentage of methane in a methane/hydrogen mixture which, in a test engine under standard conditions, has the same tendency to knock as the gaseous fuel to be examined. 3.9 natural gas complex gaseous mixture of hydrocarbons, primarily methane, but generally includes ethane, propane and higher hydrocarbons, and some non-combustible gases such as nitrogen and carbon dioxide Note 1 to entry: Natural gas can also contain components or contaminants such as sulfur compounds and/or other chemical species. 3.10 natural gas network either transmission network or local distribution system 3.11 non-grid sourced natural gas natural gas non coming from the natural gas network 3.12 odorization addition of odorants to gas (normally odourless) to allow gas leaks to be recognized by smell at trace levels (before accumulating to dangerous concentrations in air) 3.13 syngas gas, comprising principally of carbon monoxide and hydrogen, obtained from gasification of fossil fuel 3.14 upgrading of biogas removal of carbon dioxide and contaminants from biogas 3.15 water dew point temperature temperature above which no condensation of water occurs at a specified pressure kSIST FprEN 16723-1:2016

FprEN 16723-1:2016 (E) 8

3.16 Wobbe index volumetric-basis heating value, at specified reference conditions, divided by the square root of the relative density at the same specified metering reference conditions 4 Parameters and test methods 4.1 General This section deals with the various parameters for which requirements are given. Natural gas, biomethane and blends of those intended for injection into natural gas networks shall be free from any constituents or impurities other than the ones described in this standard, to the extent that it cannot be transported, stored or utilized without quality adjustment or treatment. In the case of such other constituents and/or impurities, it may be necessary to obtain an approval from the competent and legitimate authority to define the acceptable risk in the territory of the injection point. 4.2 Standard reference conditions Unless stated otherwise, all volumes are for the real dry gas at ISO Standard Reference conditions of 15 °C and 101,325 kPa. Unless stated otherwise, all calorific values and Wobbe index are for the real dry gas at ISO Standard Reference conditions of: — 15 °C (combustion); — and 15 °C and 101,325 kPa (metering). In assessing compliance with this European Standard, parameters should be determined directly at ISO standard reference conditions. If the properties are only available at other reference conditions and the actual gas composition is not known then conversion to ISO standard reference conditions shall be carried out using the procedure described in EN ISO 13443. 4.3 Applicable requirements and test methods for biomethane for injection in the natural gas network Biomethane shall meet the requirements of EN 16726 for common parameters and Table 1 only for parameters specific to biomethane. Health criteria assessment for biomethanes is complex and dependent upon the biogas feedstock and upgrading and purification process. As a result, it is recommended that contaminants to be specified and limits to be applied are assessed at national level using an appropriate methodology. An example of such a methodology is provided in CEN/TR, Proposed limit values for contaminants in biomethane based on health assessment criteria (WI 00408007)1). Table 1 provides common requirements for injection into H and L gas systems. For injection into L gas systems, national requirements for Wobbe index, relative density, and CO2 shall be applied when appropriate.

1) This CEN/TR is currently in development. kSIST FprEN 16723-1:2016
FprEN 16723-1:2016 (E)

Table 1 — Applicable common requirements and test methods for biomethane at the point of entry into H gas and L gas networks Parameter Unit Limit valuesa Test method Min Max Total volatile silicon (as Si) mgSi/m3

0,3 to 1b EN ISO 16017-1:2000 TDS-GC-MS Compressor oil
c ISO 8573-2:2007 Dust impurities
c ISO 8573-4:2001 Chlorinated compounds
_ d, e EN 1911:2010
Fluorinated compounds
d NF X43-304:2007 ISO 15713:2006 CO % mol _ 0,1f EN ISO 6974 series NH3 mg/m3
10g NEN 2826:1999 or
VDI 3496 Blatt 1:1982-04 NF X43-303:2011 Amine mg/m3

10g VDI 2467 Blatt 2:1991-08 a Limit values are absolute, the number of the decimal places shall not imply the accuracy of the test methods. b A range of limit values for siloxanes is proposed for this standard. Studies have demonstrated that continuous exposure to 100 % biomethane for 15 years should require a specification as low as 0,1 mg Si/m3. However, a limit set at this level would present difficulty in terms of analytical measurement (current quantification

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