EN 16726:2015+A1:2018

Gas infrastructure - Quality of gas - Group H

This European standard specifies gas quality characteristics, parameters and their limits, for gases classified as group H that are to be transmitted, injected into and from storages, distributed and utilized.
NOTE   For information on gas families and gas groups see EN 437.
This European standard does not cover gases conveyed on isolated networks.
For biomethane, additional requirements indicated in prEN 16723 1 apply.

Gasinfrastruktur - Beschaffenheit von Gas - Gruppe H

Diese Europäische Norm legt die Kenngrößen und Parameter sowie die zugehörigen Grenzwerte für die Beschaffenheit von als Gruppe H eingeteilten Gasen fest, die zu transportieren, in Speicher ein  und aus Speichern auszuspeisen, zu verteilen und zu verbrauchen sind.
ANMERKUNG   Für Informationen zu Gasfamilien und Gasgruppen siehe EN 437.
Diese Europäische Norm umfasst keine Gase, die in isolierten Netzen befördert werden.
Für Biomethan gelten die zusätzlichen Anforderungen nach EN 16723 1.

Infrastructures gazières - Qualité du gaz - Groupe H

Infrastruktura za plin - Kakovost plina - Skupina H (vključno z dopolnilom A1)

Ta evropski standard določa kakovostne karakteristike, parametre in njihove omejitve za pline iz skupine H, namenjene za prenos, vnos v vsebnike in odstranitev iz njih, distribucijo ter uporabo.
OPOMBA: Za več informacij o družinah in skupinah plinov glej standard EN 437.
Ta evropski standard ne zajema plinov, ki se prenašajo v izoliranih omrežjih.
Za biometan veljajo dodatne zahteve iz standarda prEN 16723 1.

General Information

• Status: Withdrawn
• Publication Date: 17-Jul-2018
• Withdrawal Date: 22-Sep-2025
• ICS: 75.060 - Natural gas
• Technical Committee: CEN/TC 234 - Gas infrastructure
• Drafting Committee: CEN/TC 234/WG 11 - Gas Quality
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 10-Sep-2025
• Completion Date: 23-Sep-2025
• Mandate: M/400 - Mandate to CEN for Standardisation in the field of gas qualities
• Ref Project: SIST EN 16726:2016+A1:2018 - Gas infrastructure - Quality of gas - Group H

Relations

• Merged From: EN 16726:2015 - Gas infrastructure - Quality of gas - Group H
• Effective Date: 30-May-2018
• Replaced By: EN 16726:2025 - Gas infrastructure - Quality of gas - Group H
• Effective Date: 19-Jan-2023

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gasinfrastruktur - Beschaffenheit von Gas - Gruppe HInfrastructures gazières - Qualité du gaz - Groupe HGas infrastructure - Quality of gas - Group H75.060Zemeljski plinNatural gasICS:Ta slovenski standard je istoveten z:EN 16726:2015+A1:2018SIST EN 16726:2016+A1:2018en,fr,de01-december-2018SIST EN 16726:2016+A1:2018SLOVENSKI
STANDARDSIST EN 16726:20161DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16726:2015+A1
July
t r s z ICS
y wä r x r Supersedes EN
s x y t xã t r s wEnglish Version
Gas infrastructure æ Quality of gas æ Group H Infrastructures gazières æ Qualité du gaz æ Groupe H
Gasinfrastruktur æ Beschaffenheit von Gas æ Gruppe HThis European Standard was approved by CEN on
t v October
t r s w and includes Amendment
s approved by CEN on
t z March
t r s zä
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 Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z 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 xã t r s w ªA sã t r s z ESIST EN 16726:2016+A1:2018

Calculation of methane number of gaseous fuels for engines . 9 A.1 Introduction . 9 A.2 Calculation of methane number . 9 A.3 Example 1: 2H-gas . 10 A.4 Example 2: enriched biomethane . 16 A.5 Example 3: 2H-gas with hydrogen addition . 17 Annex B (informative)
Sulfur . 31 B.1 General . 31 B.2 Total sulfur from Odorants . 31 Annex C (informative)
Water dew point and hydrocarbon dew point . 35 C.1 Water dew point . 35 C.2 Hydrocarbon dew point . 35 Annex D (informative)
Background for not including a Wobbe Index range into this standard . 36 D.1 General . 36 D.2 A common European Wobbe index range . 38 Annex E (informative)
Hydrogen - Admissible Concentrations in natural gas systems . 39 Annex F (informative)
Sampling . 40 Annex G (informative)
A–deviations . 41 Bibliography . 47
based on normal reference condition 25°C /0°C (for information) Reference standards for test methodsd (informative) Min. Max. Min. Max. Relative density no unit 0,555 0,700 0,555 0,700 EN ISO 6976,
EN ISO 15970 Total sulfur without odorant mg/m3 not applicable 20a not applicable 21a EN ISO 6326-5,
EN ISO 19739 For sulfur in high pressure networks and on interconnection points the maximum acceptable sulfur content for conveyance is 20 mg/m3, where in high pressure networks non-odorized gas is current practice. However, for existing practices with respect to transmission of odorized gas between high pressure networks higher sulfur content value up to 30 mg/m3 may be accepted. NOTE On distribution networks the odorization is considered as a national safety issue. Some information about sulfur odorant content is given in Annex B. SIST EN 16726:2016+A1:2018

based on normal reference condition 25°C /0°C (for information) Reference standards for test methodsd (informative) Min. Max. Min. Max. Hydrogen sulphide + Carbonyl sulphide
(as sulfur) mg/m3 not applicable 5a not applicable 5a EN ISO 6326-1,
EN ISO 6326-3,
EN ISO 19739 Mercaptan sulfur without odorant (as sulfur) mg/m3 not applicable 6a not applicable 6a EN ISO 6326-3,
EN ISO 19739 Oxygen mol/mol not applicable 0,001 % or 1 %
(see below) not applicable 0,001 % or 1 %
(see below) EN ISO 6974-3,
EN ISO 6974-6,
EN ISO 6975 At network entry points and interconnection points the mole fraction of oxygen shall be no more than 0,001 %, expressed as a moving 24 hour average. However, where the gas can be demonstrated not to flow to installations sensitive to higher levels of oxygen, e.g. underground storage systems, a higher limit of up to 1 % may be applied. Carbon dioxide mol/mol not applicable 2,5 % or 4 %
see below not applicable 2,5 % or 4 %
see below EN ISO 6974 parts 1 to 6, EN ISO 6975 At network entry points and interconnection points the mole fraction of carbon dioxide shall be no more than 2,5 %. However, where the gas can be demonstrated not to flow to installations sensitive to higher levels of carbon dioxide, e.g. underground storage systems, a higher limit of up to 4 % may be applied. Hydro carbon dew pointb,c °C not applicable
«2 not applicable
«2 ISO 23874,
ISO/TR 12148 at any pressure from 0,1 to 7 MPa (70 bar) absolute pressure Water dew pointb,c at 7 MPa (70 bar) or, if less than 7 MPa (70 bar), at maximum operating pressure of the system in which the gas flows °C not applicable
«8 not applicable
«8 EN ISO 6327,
EN ISO 18453,
EN ISO 10101 parts 1 to 3 Methane number no unit 65 not applicable 65 not applicable see normative
Annex A SIST EN 16726:2016+A1:2018

based on normal reference condition 25°C /0°C (for information) Reference standards for test methodsd (informative) Min. Max. Min. Max. Contaminants The gas shall not contain constituents other than listed in Table 1 at levels that prevent its transportation, storage and/or utilization without quality adjustment or treatment. a Figures are indicated without post-comma digits due to analytical uncertainty. b Under given climatic conditions, a higher water dew point and hydrocarbon dew point may be accepted at national level. c For further information on water dew point and hydrocarbon dew point see Annex C. d Test methods other than those listed in the reference standards indicated in Table 1 may be applied, provided their fitness for purpose can be demonstrated. Gas quality shall not impede safety of gas appliances and operations of end users. Appropriate measures shall be taken. NOTE Applications are sensitive towards variations of the gas quality depending on the type of application and the degree of variation. For sampling, reference is made to Annex F. SIST EN 16726:2016+A1:2018

Calculation of methane number of gaseous fuels for engines A.1 Introduction The methane number of a gaseous fuel can be calculated from its composition according to several different methods, all of which can give different results. For the purposes of compliance with this European standard the methodology described in this Annex shall be employed. The method is based on the original data of the research program performed by AVL Deutschland GmbH /1/ for FVV (the Research Association for Combustion Engines) but employs amendments implemented in 2005 and 2011 by MWM GmbH. These amendments have been unpublished until the publication of this European standard. The method requires input of composition in the form of volume fractions at reference conditions of 0 °C and 101,325 kPa and expressed as a percentage. Composition is more likely to be available either as mole fraction (e.g. in the natural gas transmission and distribution industry) or as mass fraction (e.g. in the automotive fuel industry) and conversion to volume fraction shall be performed using the methods in ISO 14912. Numerical examples are provided so as to enable software developers to validate implementations of the methodology described in this annex. As an aid to validation a relatively large number of decimal places has been retained. For expression of the final result rounding to zero decimal points is recommended. A.2 Calculation of methane number A.2.1 Applicability The method described in this European Standard is applicable to gaseous fuels comprising the following gases: carbon monoxide; butadiene; butylene; ethylene; propylene; hydrogen sulphide; hydrogen; propane; ethane; butane; methane; nitrogen and carbon dioxide. The method treats hydrocarbons other than those specified as butane and is therefore applicable to gaseous fuels containing such higher hydrocarbons. The numerical examples provided in this annex are appropriate to gases of the second family and hence consider mixtures comprising methane, ethane, propane, butane, nitrogen and carbon dioxide. Hydrogen is also included in one example because of the growing interest in injection of hydrogen into gas pipelines. During the preparation of this standard MWM GmbH has confirmed that the method is applicable to both 2H and 2L gases. Oxygen and water vapour shall be ignored and the fuel gas composition shall be calculated on a dry, oxygen-free basis. A.2.2 General approach The methane number of a gaseous fuel is calculated from its composition in five steps. The steps are outlined below and discussed more fully in turn in A.3. Additional examples are discussed in A.4 and A.5. Table A.10 provides results of calculations for further software validation purposes. SIST EN 16726:2016+A1:2018

= 0,2100 + 0,1900 + (0,0400 + 0,0500) × 2,3 + 0,0600 × 5,3
= 0,9250 (Column 2) The simplified mixture is then re-normalized to 100 % (Column 3). SIST EN 16726:2016+A1:2018

Methane – Hydrogen – Ethane — A2:
Propane – Ethane – Butane — A3: Hydrogen – Propane - Propylene — A4: Methane – Ethane – Propane — A5: Methane – Hydrogen – Propane — A6: Methane – Hydrogen – Butane — A7: Methane – Propane – Butane — A8: Methane – Ethane – Butane — A9: Methane – Ethylene – Butane — A10: Methane – Hydrogen Sulphide – Butane — A11: Methane – Ethane – Hydrogen Sulphide — A12: Methane – Propylene — A13: Ethane – Propylene — A14: Carbon Monoxide – Hydrogen — A15: Ethane – Ethylene — A16: Propane – Ethylene — A17: Butadiene — A18: Butylene NOTE Mixtures A12 – A16 are clearly not ternary systems; however, for ease of mathematical treatment the coefficients have been adjusted so as to allow the expression of the methane number using a single equation. A.3.2.2 Range of applicability of ternary mixture data The range of applicability of most ternary systems is wide (each component can vary from 0 to 100 %). However, for some ternary systems there is a reduced range of applicability. This is a major issue when selecting ternary mixtures. The range of applicability of each ternary system is specified in Table A.2, expressed as maximum and minimum content of each component. SIST EN 16726:2016+A1:2018

« MNmin), where MNmax and MNmin are the maximum and minimum methane numbers for the selected partial mixtures. In the case of example 1, three ternary partial mixtures are selected and hence there are nine quantities to be determined, however four of these may be obtained by material balance considerations. NA8, methane = Nmethane
« NA4, methane
« NA7, methane NA8, ethane = Nethane
« NA4, ethane NA7, propane = Npropane
« NA4, propane NA8, butane = Nbutane
« NA7, butane Where Nt,comp is the quantity of the respective component in partial mixture t. SIST EN 16726:2016+A1:2018

« MNmin) will result in slightly different values of methane number of the simplified mixture. In addition, the use of different starting values for the composition and fraction of each partial mixture will result in slightly different values of methane number of the simplified mixture. These differences are within the uncertainties of this method and it is recommended that the final value of methane number is rounded to zero decimal places before reporting. In the case of example 1, the composition and fraction of partial mixtures is provided in Table A.5 (Columns 4 – 9). For clarity, the five adjusted quantities are shown in underlined text. A.3.6 Calculation of the methane number of the simplified mixture The methane number of the simplified mixture is determined from the weighted average of the methane number of the relevant partial ternary mixtures: ()==′=⋅∑sys1tNtttMNMNF (A.4) Where MN" is the methane number of the simplified mixture MNt is the methane number of partial mixture t Ft is the fraction of the partial mixture t Nsys is the number of ternary systems selected
In the case of example 1, this results in a methane number of the simplified mixture of MN" = 74,9018. A.3.7 Calculation of the methane number of the gaseous fuel The methane number of the gaseous fuel is calculated by correcting the methane number of the simplified mixture to allow for the presence of inerts in the original fuel gas: MN = MN" + MNinerts
« MNmethane (A.5) In the original work of AVL/1/MNinerts is the methane number of a methane-carbon dioxide–nitrogen mixture having the same inerts content as that of the original mixture. However in the amendment of MWM the MNinerts is calculated for a methane-carbon dioxide-nitrogen mixture containing only carbon dioxide and methane. MNmethane is calculated for a methane-carbon dioxide-nitrogen mixture containing pure methane and is equal to 100,0003. The methane number of the methane-carbon dioxide-nitrogen mixture is calculated using Formula (A.3). Table A.2 lists the appropriate coefficients (system A20). SIST EN 16726:2016+A1:2018

= 0,1461 + 0,0292 × 2,3 + 0,0000 × 5,3
= 0,2133 (Column 2) The simplified mixture is then re-normalized to 100 % (Column 3). A.4.2 Calculation of fitness of the ternary systems Application of Formula (A.1) to example 2 results in the values of Wj shown in Table A.7. A.4.3 Selection of ternary mixtures The first component in the simplified mixture is propane and this is present in ternary systems that have all their components present in the simplified mixture – A2, A4, A7 and A8. In this case, A7 is selected because it has the largest value of fitness (10,6652). The second component in the simplified mixture is ethane and this is not represented in system A7, so system selection continues and system A4 is selected because it has the highest value of fitness (10,6380). The third and fourth components of the simplified mixture are represented in system A7 (butane and methane) and A4 (methane) so the selection process restarts. The selection process is repeated with the first component in the simplified mixture (propane), which is already represented in selected systems A4 and A7. Selection continues with the second component in the simplified mixture (ethane), which is represented in only one selected system (A4), so system A8 is selected because it has the next highest value of fitness (9,0508). All components of the simplified mixture are represented in at least two systems and so selection ends. The systems selected are therefore: A4, A7 and A8. A.4.4 Calculation of the methane number After preliminary division of the simplified mixture the calculation of methane number according to the methods in A.3.3 to A.3.7 the methane number of the gaseous fuel of example 2 is shown in Table A.5. Again, for clarity, the five adjusted quantities are shown in underlined text. The value of methane number obtained (69,0336) is reported as 69. SIST EN 16726:2016+A1:2018

= 0,1909 + 0,1727 + (0,0364 + 0,0455) × 2,3 + 0,0545 × 5,3
= 0,8408 (Column 2) The simplified mixture is then re-normalized to 100 % (Column 3). A.5.2 Calculation of fitness of the ternary systems Application of Formula (A.1) to example 3 results in the values of Wj shown in Table A.9. A.5.3 Selection of ternary mixtures The first component in the simplified mixture is hydrogen and this is present in ternary systems that have all their components present in the simplified mixture – A1, A5 and A6. In this case, A1 is selected because it has the largest value of fitness (10,5906). The second component in the simplified mixture is propane and this is not represented in system A1, so system selection continues and system A5 is selected because it has the largest value of fitness (9,9921). The third component in the simplified mixture is ethane and this is already represented in system A1, so no additional system is selected. The fourth component in the simplified mixture is butane and this is not represented in the systems already selected. System A6 is selected because it has the largest value of fitness (9,9668). The fifth component of the simplified mixture (methane) is represented in all three of the systems already selected, so no additional system is required. Selection is repeated with the first component in the simplified mixture (hydrogen) and this is already represented in systems A1, A5 and A6, so no additional system is required. Selection is continued with the second component in the simplified mixture (propane) and ternary system A4 is selected because it has the largest value of fitness (9,7749). The third component in the simplified mixture (ethane) is represented in systems A1 and A4, so no additional system is required. The fourth component in the simplified mixture (butane) is represented in one system (A6) and so system A8 is selected because it has the next largest value of fitness (7,9495). All components in the simplified mixture are now represented in at least two of the ternary systems selected and the selection process ends. The systems selected are therefore: A1, A4, A5, A6 and A8. A.5.4 Calculation of the methane number In the case of example 3, five ternary partial mixtures are selected and hence there are 15 quantities to be determined, however five of these may be obtained by material balance considerations. NA8, methane = Nmethane
« NA1, methane
« NA4, methane
« NA5, methane
« NA6, methane NA8, ethane = Nethane
« NA1, ethane
« NA4, ethane SIST EN 16726:2016+A1:2018

« NA4, propane NA8, butane = Nbutane
« NA6, butane NA6, hydrogen= Nhydrogen « NA5, hydrogen « NA1, hydrogen The composition and fraction of each partial mixture is therefore determined by adjustment of 10 quantities: the quantities of methane, ethane and hydrogen in A1, the quantities of methane, ethane and propane in A4, the quantities of methane and hydrogen in A5 and the quantities of methane and butane in A6. After preliminary division of the simplified mixture and calculation of methane number according to the methods in A.3.3 to A.3.7 the methane number of the gaseous fuel of example 3 is shown in Table A.8. For clarity, the 10 adjusted quantities are shown in underlined text. The value of methane number obtained (75,695) is reported as 76. A.5.5 Additional numerical examples Table A.10 provides the results of calculations for a variety of compositions for additional software validation purposes.
1 2 3 4 5 6 7 8 9
mix A4 mix A7 mix A8
NA4,i VA4,i NA7,i VA7,i NA8,i VA8,i
% vol/vol
% vol/vol
% vol/vol
% vol/vol
% vol/vol methane 90,0900 90,0900 92,0460 30,6820 89,7490 30,6820 96,3968 30,6820 90,2818 ethane 5,5400 5,5400 5,6603 2,8301 8,2785
2,8301 8,3277 propane 1,3200 1,3200 1,3487 0,6743 1,9725 0,6743 2,1186
butanes
0,9250 0,9451
0,4725 1,4846 0,4725 1,3905 i-butane 0,2100
n-butane 0,1900
i-pentane 0,0400
n-pentane 0,0500
hexanes+ 0,0600
nitrogen 1,0400
carbon dioxide 1,4600
hydrogen 0,0000
total 100,0000 97,8750 100,0000 34,1865 100,0000 31,8289 100,0000 33,9847 100,0000 Fraction, Ft
0,3419
0,3183
0,3398 MNt
76,2489
77,3777
71,9706
A1 A2 A3 A4 A5 A6 A7 x: methane propane hydrogen methane methane methane methane y: hydrogen ethane propane ethane hydrogen hydrogen propane z: ethane butane propylene propane propane butane butane a(0, 0) 4,3628190E+01 1,0245130E+01 1,8627940E+01 3,3539090E+01 3,4758040E+01 1,2299020E+01 1,0169140E+01 a(1, 0)
«9,2508870E-02 8,5906610E-02
«1,2035810E-01
«1,0282240E-01
«5,1949050E-01
«7,5182070E-01 4,3666120E-01 a(0, 1)
«1,0488580E-02 1,4982130E-01 1,0871090E-01 2,0683750E-01 5,4737050E-02
«4,5103700E-01 3,8170960E-02 a(2, 0) 1,6449270E-02 7,3843960E-03 1,9298010E-02 2,3981410E-02 4,4054460E-02 5,1433330E-02
«8,7264540E-02 a(1, 1)
«2,5007730E-03 9,5705040E-03
«1,3050630E-03 3,3161370E-03 2,6425310E-02 5,1261470E-02
«7,9478640E-03 a(0, 2)
«4,3202740E-03 5,1369710E-03 1,7985000E-03
«3,5536890E-03
«1,0567810E-02 1,7866300E-02 1,0365010E-02 a(3, 0)
«3,1191690E-04
«1,0036620E-04
«1,3018080E-03
«9,5847460E-04
«8,7433290E-04
«1,0241590E-03 5,9397950E-03 a(2, 1)
«6,0486960E-05
«2,0203270E-04 2,9904470E-05
«2,4096040E-04
«1,0846450E-03
«1,6406520E-03 3,2678860E-04 a(1, 2)
«5,3528010E-05
«4,5802770E-05 8,5613760E-05 3,9418400E-05
«3,5553270E-04
«1,0022400E-03 2,3714910E-04 a(0, 3) 6,8507420E-05
«5,6856150E-05
«2,5836670E-05 5,0018560E-05 2,2897690E-04
«1,4279120E-04
«1,6152150E-04 a(4, 0) 2,1223340E-06 4,1273050E-07 4,1692950E-05 2,0052880E-05 5,4767420E-06 6,6995630E-06
«1,8541270E-04 a(3, 1) 2,1993700E-06 1,2511380E-06 2,0011240E-07 3,4585100E-06 1,1309800E-05 1,5661210E-05
«3,3085860E-07 a(2, 2) 1,2109690E-06 3,1147030E-07
«6,8546460E-07 8,0364540E-07 7,9874880E-06 1,5763060E-05
«4,9758630E-06 a(1, 3) 2,9706580E-07
«3,1401570E-07
«6,2626130E-07
«4,3338760E-07 7,4860850E-07 5,2498880E-06
«8,7822910E-07 a(0, 4)
«6,7138020E-07 2,4039480E-07 1,1987890E-07
«2,5042560E-07
«1,6340240E-06 0,0000000E+00 7,7408400E-07 a(5, 0) 0,0000000E+00 0,0000000E+00
«6,9526380E-07
«2,1154170E-07 0,0000000E+00 0,0000000E+00 2,9565980E-06 a(6, 0) 0,0000000E+00 0,0000000E+00 5,7989840E-09 9,0540200E-10 0,0000000E+00 0,0000000E+00
«2,3370740E-08 a(7, 0) 0,0000000E+00 0,0000000E+00
«1,9133740E-11 0,0000000E+00 0,0000000E+00 0,0000000E+00 7,3223480E-11 a(0, 5) 0,0000000E+00 0,0000000E+00 0,0000000E+00 0,0000000E+00 0,0000000E+00 0,0000000E+00 0,0000000E+00 a(0, 6) 0,0000000E+00 0,0000000E+00 0,0000000E+00 0,0000000E+00 0,0000000E+00 0,0000000E+00 0,0000000E+00 x(max), % vol/vol 100,0 100,0 100,0 100,0 100,0 100,0 100,0 x(min), % vol/vol 0,0 0,0 0,0 0,0 0,0 0,0 0,0 y(max), % vol/vol 100,0 100,0 100,0 100,0 100,0 100,0 100,0 y(min), % vol/vol 0,0 0,0 0,0 0,0 0,0 0,0 0,0 z(max), % vol/vol 100,0 100,0 100,0 100,0 100,0 100,0 100,0 z(min), % vol/vol 0,0 0,0 0,0 0,0 0,0 0,0 0,0 SIST EN 16726:2016+A1:2018

Table A.2 (continued)
A8 A9 A10 A11 A12 A13 A14 x: methane methane methane methane methane ethane carbon monoxide y: ethane ethylene hydrogen sulphide ethane propylene propylene hydrogen z: butane butane butane hydrogen sulphide
a(0, 0) 1,0777610E+01
«1,2408570E+05 1,8388506E+05
«1,1788466E+05 5,9095515E+01 3,1550700E+01 0,0000000E+00 a(1, 0) 1,6474900E-01 1,1938458E+04
«1,5396773E+04
...