• ISO 6976:2016

    Current The latest, up-to-date edition.

    Natural gas Calculation of calorific values, density, relative density and Wobbe indices from composition

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  French, English

    Published date:  04-08-2016

    Publisher:  International Organization for Standardization

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    Abstract - (Show below) - (Hide below)

    ISO 6976:2016 specifies methods for the calculation of gross calorific value, net calorific value, density, relative density, gross Wobbe index and net Wobbe index of natural gases, natural gas substitutes and other combustible gaseous fuels, when the composition of the gas by mole fraction is known. The methods specified provide the means of calculating the properties of the gas mixture at commonly used reference conditions.

    Mole fractions by definition sum to unity. Guidance on the achievement of this requirement by chromatographic analysis is available in ISO 69741 and ISO 69742.

    The methods of calculation require values for various physical properties of the pure components; these values, together with associated uncertainties, are provided in tables and their sources are identified.

    Methods are given for estimating the standard uncertainties of calculated properties.

    The methods of calculation of the values of properties on either a molar, mass or volume basis are applicable to any natural gas, natural gas substitute or other combustible fuel that is normally gaseous, except that for properties on the volume basis the method is restricted to mixtures for which the compression factor at reference conditions is greater than 0,9.

    Example calculations are given in Annex D for the recommended methods of calculation.

    NOTE 1 The qualifiers "superior", "higher", "upper" and "total" are, for the purposes of this document, synonymous with "gross"; likewise, "inferior" and "lower" are synonymous with "net". The term "heating value" is synonymous with "calorific value"; "mass density" and "specific density" are synonymous with "density"; "specific gravity" is synonymous with "relative density"; "Wobbe number" is synonymous with "Wobbe index"; "compressibility factor" is synonymous with "compression factor". The dimensionless quantity molecular weight is numerically equal to the molar mass in kgkmol1.

    NOTE 2 There are no explicit limits of composition to which the methods described in this document are applicable. However, the restriction of volume-basis calculations to mixtures with a compression factor greater than 0,9 at reference conditions sets implicit limits on composition.

    NOTE 3 Because the mole fraction of any water present is not normally available from chromatographic analysis, it is common practice to calculate the physical properties on a dry gas basis and to allow for the effects of water vapour in a separate procedure. However, if the mole fraction of water vapour is known then the property calculations can be carried out completely in accordance with the procedures described herein. The effects of water vapour on calorific value, whether the latter is directly measured or calculated, are discussed in ISO/TR 29922.

    NOTE 4 For aliphatic hydrocarbons of carbon number 7 or above, any isomer present is included with the normal isomer of the same carbon number.

    NOTE 5 If the user's requirement includes the replacement of, for example, a C6+ or C7+ grouping of analytically unresolved components by a single pseudo-component, then it is the user's own task to set the mole fraction composition, and hence properties, of this pseudo-component so as to be fit for purpose in the particular application. Any so-called "spectator water" and "non-combustible hydrogen sulfide" are treated as pseudo-components by setting the appropriate enthalpy of combustion values to zero.

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    Committee ISO/TC 193/SC 1
    Development Note Supersedes ISO/DIS 6976. (08/2016)
    Document Type Standard
    Publisher International Organization for Standardization
    Status Current
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    DIN EN ISO 15971 E : 2014 NATURAL GAS - MEASUREMENT OF PROPERTIES - CALORIFIC VALUE AND WOBBE INDEX (ISO 15971:2008)
    NORSOK I 104 : REV 3 FISCAL MEASUREMENT SYSTEMS FOR HYDROCARBON GAS
    ISO 20765-1:2005 Natural gas Calculation of thermodynamic properties Part 1: Gas phase properties for transmission and distribution applications
    VDI 4608-1 : 2005 ENERGY SYSTEMS - COMBINED HEAT AND POWER - TERMS, DEFINITIONS, EXAMPLES
    11/30232917 DC : 0 BS ISO 13579-1 - INDUSTRIAL FURNACES AND ASSOCIATED PROCESSING EQUIPMENT - METHOD OF MEASURING ENERGY BALANCE AND CALCULATING EFFICIENCY - PART 1: GENERAL METHODOLOGY
    BS EN ISO 15970 : 2014 NATURAL GAS - MEASUREMENT OF PROPERTIES - VOLUMETRIC PROPERTIES: DENSITY, PRESSURE, TEMPERATURE AND COMPRESSION FACTOR
    OIML R 140 : 2007 MEASURING SYSTEMS FOR GASEOUS FUEL
    I.S. EN 62282-3-200:2016 FUEL CELL TECHNOLOGIES - PART 3-200: STATIONARY FUEL CELL POWER SYSTEMS - PERFORMANCE TEST METHODS
    DIN EN 12405-3:2016-04 Gas meters - Conversion devices - Part 3: Flow computer
    CEN ISO/TR 24094 : 2007 ANALYSIS OF NATURAL GAS - VALIDATION METHODS FOR GASEOUS REFERENCE MATERIALS
    BS EN ISO 15112:2014 NATURAL GAS - ENERGY DETERMINATION
    DIN EN ISO 14912:2006-11 Gas analysis - Conversion of gas mixture composition data (ISO 14912:2003)
    PREN 416 : DRAFT 2017 GAS-FIRED OVERHEAD RADIANT TUBE HEATERS AND RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - SAFETY AND ENERGY EFFICIENCY
    PD ISO/TR 26762:2008 Natural gas. Upstream area. Allocation of gas and condensate
    ISO 18888:2017 Gas turbine combined cycle power plants Thermal performance tests
    ISO 16346:2013 Energy performance of buildings Assessment of overall energy performance
    BS PD6574(1994) : 1994 DETERMINATION OF EMISSIONS FROM APPLIANCES BURNING GASEOUS FUELS DURING TYPE-TESTING
    DIN EN ISO 15970 E : 2014 NATURAL GAS - MEASUREMENT OF PROPERTIES - VOLUMETRIC PROPERTIES: DENSITY, PRESSURE, TEMPERATURE AND COMPRESSION FACTOR (ISO 15970:2008)
    13/30289289 DC : 0 BS EN 12405-3 - GAS METERS - CONVERSION DEVICES - PART 3: FLOW COMPUTER
    VDI 3985 : 2004 PRINCIPLES FOR THE DESIGN, CONSTRUCTION AND ACCEPTANCE OF COMBINED HEAT AND POWER PLANTS WITH INTERNAL COMBUSTION ENGINES
    BS EN 437 : 2003 TEST GASES - TEST PRESSURES - APPLIANCE CATEGORIES
    10/30218038 DC : DRAFT MAY 2010 BS ISO 15112 - NATURAL GAS - ENERGY DETERMINATION
    12/30257298 DC : 0 BS EN 676 - FORCED DRAUGHT BURNERS FOR GASEOUS FUELS
    DD ISO/TS 29041 : 2008 GAS MIXTURES - GRAVIMETRIC PREPARATION - MASTERING CORRELATIONS IN COMPOSITION
    12/30272264 DC : 0 BS ISO 20765-2 - NATURAL GAS - CALCULATION OF THERMODYNAMIC PROPERTIES - PART 2: SINGLE-PHASE PROPERTIES (GAS, LIQUID, AND DENSE FLUID) FOR EXTENDED RANGES OF APPLICATION
    BS ISO 16346 : 2013 ENERGY PERFORMANCE OF BUILDINGS - ASSESSMENT OF OVERALL ENERGY PERFORMANCE
    BS ISO 16110-2 : 2010 HYDROGEN GENERATORS USING FUEL PROCESSING TECHNOLOGIES - PART 2: TEST METHODS FOR PERFORMANCE
    PREN 1473 : DRAFT 2018 INSTALLATION AND EQUIPMENT FOR LIQUEFIED NATURAL GAS - DESIGN OF ONSHORE INSTALLATIONS
    BS EN ISO 6974-6 : 2008 NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 6: DETERMINATION OF HYDROGEN, HELIUM, OXYGEN, NITROGEN, CARBON DIOXIDE AND C[1] TO C[8] HYDROCARBONS USING THREE CAPILLARY COLUMNS
    I.S. EN 62282-3-201:2017 FUEL CELL TECHNOLOGIES - PART 3-201: STATIONARY FUEL CELL POWER SYSTEMS - PERFORMANCE TEST METHODS FOR SMALL FUEL CELL POWER SYSTEMS
    12/30202498 DC : 0 BS EN 62282-3-201 - FUEL CELL TECHNOLOGIES - PART 3-201: STATIONARY FUEL CELL POWER SYSTEMS - PERFORMANCE TEST METHODS FOR SMALL FUEL CELL POWER SYSTEMS
    BS EN 62282-4-102 : 2017 FUEL CELL TECHNOLOGIES - PART 4-102: FUEL CELL POWER SYSTEMS FOR INDUSTRIAL ELECTRIC TRUCKS - PERFORMANCE TEST METHODS (IEC 62282-4-102:2017)
    17/30327536 DC : 0 BS ISO 6578 - REFRIGERATED HYDROCARBON LIQUIDS - STATIC MEASUREMENT - CALCULATION PROCEDURE
    11/30213827 DC : 0 BS EN ISO 10723 - NATURAL GAS - PERFORMANCE EVALUATION FOR ON-LINE ANALYTICAL SYSTEMS
    BS EN 12405-3 : 2015 GAS METERS - CONVERSION DEVICES - PART 3: FLOW COMPUTER
    DIN EN ISO 15112 E : 2014 NATURAL GAS - ENERGY DETERMINATION (ISO 15112:2011)
    10/30173701 DC : 0 BS EN 62282-3-200 - FUEL CELL TECHNOLOGIES - PART 3-200: STATIONARY FUEL CELL POWER SYSTEMS - PERFORMANCE TEST METHODS
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    13/30277457 DC : 0 BS EN 1776 - GAS INFRASTRUCTURE - GAS MEASURING SYSTEMS - FUNCTIONAL REQUIREMENTS
    CEN/TR 16787 : 2014 INDUSTRIAL GAS INSTALLATION - GUIDELINE
    BS ISO 6578 : 2017 REFRIGERATED HYDROCARBON LIQUIDS - STATIC MEASUREMENT - CALCULATION PROCEDURE
    BS EN 16723-2 : 2017 NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 2: AUTOMOTIVE FUELS SPECIFICATION
    16/30312922 DC : 0 BS ISO 18888 - GAS TURBINE COMBINED CYCLE POWER PLANTS THERMAL PERFORMANCE TESTS
    09/30207853 DC : 0 BS EN 12405-2 - GAS METERS - CONVERSION DEVICES - PART 2: ENERGY CONVERSION
    BS EN 16726 : 2015 GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H
    BS ISO 20765-1 : 2005 NATURAL GAS - CALCULATION OF THERMODYNAMIC PROPERTIES - PART 1: GAS PHASE PROPERTIES FOR TRANSMISSION AND DISTRIBUTION APPLICATIONS
    UNE-EN 16723-1:2017 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
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    16/30314766 DC : 0 BS EN 62282-3-201 ED2.0 - FUEL CELL TECHNOLOGIES - PART 3-201: STATIONARY FUEL CELL POWER SYSTEMS - PERFORMANCE TEST METHODS FOR SMALL FUEL CELL POWER SYSTEMS
    UNI EN 12405-2 : 2012 GAS METERS - CONVERSION DEVICES - PART 2: ENERGY CONVERSION
    BS ISO 15971 : 2008 NATURAL GAS - MEASUREMENT OF PROPERTIES - CALORIFIC VALUE AND WOBBE INDEX
    08/30152625 DC : DRAFT APR 2008 BS ISO 16110-2 - HYDROGEN GENERATORS USING FUEL PROCESSING TECHNOLOGIES - PART 2: PROCEDURES TO DETERMINE EFFICIENCY
    BS EN 62282-3-200:2016 Fuel cell technologies Stationary fuel cell power systems. Performance test methods
    BS ISO 19970:2017 (published 2017-06) Refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels. Metering of gas as fuel on LNG carriers during cargo transfer operations
    11/30238482 DC : 0 BS EN 1458-1 - DOMESTIC DIRECT GAS-FIRED TUMBLE DRYERS OF TYPES B22D AND B23D, OF NOMINAL HEAT INPUT NOT EXCEEDING 6 KW - PART 1: SAFETY
    VDI 2077-3-1 : 2012 COR 1 2013 ENERGY CONSUMPTION ACCOUNTING FOR THE BUILDING SERVICES - DETERMINATION OF REIMBURSABLE COSTS OF HEAT GENERATION BY CHP SYSTEMS
    BS ISO 6974-6 : 2002 NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - DETERMINATION OF HYDROGEN, HELIUM, OXYGEN, NITROGEN, CARBON DIOXIDE AND C[1] TO C[8] HYDROCARBONS USING THREE CAPILLARY COLUMNS
    DIN 1871:1999-05 GASEOUS FUELS AND OTHER GASES - DENSITY AND RELATIVE DENSITY UNDER STANDARD CONDITIONS
    07/30163658 DC : 0 BS EN 621 - NON-DOMESTIC GAS-FIRED FORCED CONVECTION AIR HEATERS FOR SPACE HEATING NOT EXCEEDING A NET HEAT INPUT OF 300 KW, WITHOUT A FAN TO ASSIST TRANSPORTATION OF COMBUSTION AIR AND/OR COMBUSTION PRODUCTS
    BS ISO 14532 : 2001 AMD 15911 NATURAL GAS - VOCABULARY
    ISO 3977-4:2002 Gas turbines — Procurement — Part 4: Fuels and environment
    PREN 17175 : DRAFT 2017 GAS-FIRED OVERHEAD RADIANT STRIP HEATERS AND MULTI-BURNER CONTINUOUS RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - SAFETY AND ENERGY EFFICIENCY
    BS ISO 13579-1 : 2013 INDUSTRIAL FURNACES AND ASSOCIATED PROCESSING EQUIPMENT - METHOD OF MEASURING ENERGY BALANCE AND CALCULATING EFFICIENCY - PART 1: GENERAL METHODOLOGY
    14/30296490 DC : 0 BS EN 16723-2 - NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 2: AUTOMOTIVE FUEL SPECIFICATIONS
    BS EN ISO 15971 : 2014 NATURAL GAS - MEASUREMENT OF PROPERTIES - CALORIFIC VALUE AND WOBBE INDEX
    UNE-EN 62282-3-201:2013 Fuel cell technologies - Part 3-201: Stationary fuel cell power systems - Performance test methods for small fuel cell power systems
    DIN EN 16723-2 E : 2017 NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 2: AUTOMOTIVE FUELS SPECIFICATION
    PREN 419 : DRAFT 2017 GAS-FIRED OVERHEAD LUMINOUS RADIANT HEATERS FOR NONDOMESTIC USE - SAFETY AND ENERGY EFFICIENCY
    16/30312330 DC : 0 BS EN 62282-4-102 ED1.0 - FUEL CELL TECHNOLOGIES - PART 4-102: FUEL CELL POWER SYSTEMS FOR INDUSTRIAL ELECTRIC TRUCKS - PERFORMANCE TEST METHODS
    BS EN 16723-1:2016 Natural gas and biomethane for use in transport and biomethane for injection in the natural gas network Specifications for biomethane for injection in the natural gas network
    11/30230600 DC : 0 BS ISO 10976 - REFRIGERATED LIGHT HYDROCARBON FLUIDS - MEASUREMENT OF CARGOES ON BOARD MARINE LNG CARRIERS
    BS 3156-11.0.3(1997) : 1997 AMD 10655 ANALYSIS OF FUEL GASES - METHODS FOR NON-MANUFACTURED GASES - GENERAL - GUIDELINES TO TRACEABILITY IN ANALYSIS OF NATURAL GAS
    VDI 3986:2014-07 Determination of efficiencies of conventional power stations
    14/30311502 DC : 0 BS EN 15378-3 - HEATING SYSTEMS AND WATER BASED COOLING SYSTEMS IN BUILDINGS - HEATING SYSTEMS AND DHW IN BUILDINGS - PART 3: MEASURED ENERGY PERFORMANCE
    07/30163042 DC : DRAFT AUG 2007 BS EN 1319 - DOMESTIC GAS-FIRED FORCED CONVECTION AIR HEATERS FOR SPACE HEATING, WITH FAN-ASSISTED BURNERS NOT EXCEEDING A NET HEAT INPUT OF 70 KW
    BS EN ISO 15403-1:2008 Natural gas. Natural gas for use as a compressed fuel for vehicles Designation of the quality
    02/203214 DC : DRAFT MAR 2002 IEC 62282-3-2 - FUEL CELL TECHNOLOGIES - PART 3-2: STATIONARY FUEL CELL POWER PLANTS - TEST METHODS FOR THE PERFORMANCE
    BS EN ISO 6974-3:2001 NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 3: DETERMINATION OF HYDROGEN, HELIUM, OXYGEN, NITROGEN, CARBON DIOXIDE AND HYDROCARBONS UP TO C8 USING TWO PACKED COLUMNS
    DIN EN 12405-2:2012-10 GAS METERS - CONVERSION DEVICES - PART 2: ENERGY CONVERSION
    BS ISO 2314 : 2009 GAS TURBINES - ACCEPTANCE TESTS
    UNE-EN ISO 15970:2014 Natural gas - Measurement of properties - Volumetric properties: density, pressure, temperature and compression factor (ISO 15970:2008)
    BS 3156-11.5(1996) : 96 AMD 14164 ANALYSIS OF FUEL GASES - METHODS FOR NON-MANUFACTURED GASES - PERFORMANCE EVALUATION FOR ON-LINE ANALYTICAL SYSTEMS
    07/30170559 DC : DRAFT AUG 2007 BS ISO 2314 - GAS TURBINES - ACCEPTANCE TESTS
    OIML R 137-1 : 2006 GAS METERS - PART 1: REQUIREMENTS
    04/30122896 DC : DRAFT SEP 2004 ISO 15112 - NATURAL GAS - ENERGY DETERMINATION
    BS ISO 10976:2012 REFRIGERATED LIGHT HYDROCARBON FLUIDS - MEASUREMENT OF CARGOES ON BOARD LNG CARRIERS
    DIN EN ISO 15970:2014-09 NATURAL GAS - MEASUREMENT OF PROPERTIES - VOLUMETRIC PROPERTIES: DENSITY, PRESSURE, TEMPERATURE AND COMPRESSION FACTOR (ISO 15970:2008)
    ISO 18453:2004 Natural gas Correlation between water content and water dew point
    BS EN 12405-2 : 2012 GAS METERS - CONVERSION DEVICES - PART 2: ENERGY CONVERSION
    06/30139635 DC : 0 EN 777-2 - MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - PART 2: SYSTEM E, SAFETY
    ISO/TR 14749:2016 Natural gas Online gas chromatograph for upstream area
    06/30139629 DC : 0 EN 777-1 - MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - PART 1: SYSTEM D, SAFETY
    BS ISO 20765-2 : 2015 NATURAL GAS - CALCULATION OF THERMODYNAMIC PROPERTIES - PART 2: SINGLE-PHASE PROPERTIES (GAS, LIQUID, AND DENSE FLUID) FOR EXTENDED RANGES OF APPLICATION
    BS EN ISO 14912 : 2006 GAS ANALYSIS - CONVERSION OF GAS MIXTURE COMPOSITION DATA
    UNE-EN ISO 15112:2014 Natural gas - Energy determination (ISO 15112:2011)
    PREN 676 : DRAFT 2012 FORCED DRAUGHT BURNERS FOR GASEOUS FUELS
    BS ISO 3977-4:2002 (published 2002-07) Gas turbines. Procurement Fuels and environment
    DIN EN 12405-3 E : 2016 GAS METERS - CONVERSION DEVICES - PART 3: FLOW COMPUTER
    BS 3156-11.0.3(1999) : 1999 NATURAL GAS - GUIDELINES TO TRACEABILITY IN ANALYSIS
    BS EN 62282-3-201:2017 Fuel cell technologies Stationary fuel cell power systems. Performance test methods for small fuel cell power systems
    13/30255474 DC : 0 BS ISO 7504 - GAS ANALYSIS - VOCABULARY
    BS PD CEN/TR 16787 : 2014 INDUSTRIAL GAS INSTALLATION - GUIDELINE
    06/30160085 DC : 0 BS ISO 15970 - NATURAL GAS - MEASUREMENT OF PROPERTIES - VOLUMETRIC PROPERTIES: DENSITY, PRESSURE, TEMPERATURE AND COMPRESSION FACTOR
    DIN EN ISO 15403-1:2009-10 NATURAL GAS - NATURAL GAS FOR USE AS A COMPRESSED FUEL FOR VEHICLES - PART 1: DESIGNATION OF THE QUALITY
    BS PD CEN ISO/TR 24094 : 2007 ANALYSIS OF NATURAL GAS - VALIDATION METHODS FOR GASEOUS REFERENCE MATERIALS
    ISO 6974-3:2000 Natural gas Determination of composition with defined uncertainty by gas chromatography Part 3: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and hydrocarbons up to C8 using two packed columns
    BS ISO 15112 : 2011 NATURAL GAS - ENERGY DETERMINATION
    07/30163662 DC : 0 BS EN 778 - DOMESTIC GAS-FIRED FORCED CONVECTION AIR HEATERS FOR SPACE HEATING NOT EXCEEDING A NET HEAT INPUT OF 70 KW, WITHOUT A FAN TO ASSIST TRANSPORTATION OF COMBUSTION AIR AND/OR COMBUSTION PRODUCTS
    BS 3156-11.0.2(1998) : 1998 AMD 16105 ANALYSIS OF FUEL GASES - METHODS FOR NON-MANUFACTURED GASES - GENERAL - QUALITY DESIGNATION FOR NATURAL GAS
    DIN EN ISO 15403:2007-08 NATURAL GAS - DESIGNATION OF THE QUALITY OF NATURAL GAS FOR USE AS A COMPRESSED FUEL FOR VEHICLES
    16/30313383 DC : 0 BS ISO 19970 - REFRIGERATED HYDROCARBON AND NON-PETROLEUM BASED LIQUEFIED GASEOUS FUELS - METERING OF GAS AS FUEL ON LNG CARRIERS DURING CARGO TRANSFER OPERATIONS
    BS 7420:1991 (published 1991-06) Guide for determination of calorific values of solid, liquid and gaseous fuels (including definitions)
    07/30163039 DC : DRAFT AUG 2007 BS EN 1020 - NON-DOMESTIC FORCED CONVECTION GAS-FIRED AIR HEATERS FOR SPACE HEATING NOT EXCEEDING A NET HEAT INPUT OF 300 KW INCORPORATING A FAN TO ASSIST TRANSPORTATION OF COMBUSTION AIR OR COMBUSTION PRODUCTS
    07/30163045 DC : DRAFT AUG 2007 BS EN 525 - NON-DOMESTIC DIRECT GAS-FIRED FORCED CONVECTION AIR HEATERS FOR SPACE HEATING NOT EXCEEDING A NET HEAT INPUT OF 300 KW
    BS ISO 12213-3 : 1997 AMD 16148 NATURAL GAS - CALCULATION OF COMPRESSION FACTOR - CALCULATION USING MEASURED PHYSICAL PROPERTIES
    14/30296487 DC : 0 BS EN 16723-1 - 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
    12/30264449 DC : DRAFT JULY 2012 BS EN ISO 6974-5 - NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - ISOTHERMAL METHOD FOR NITROGEN, CARBON DIOXIDE, C1 TO C5 HYDROCARBONS AND C6+ HYDROCARBONS
    BS ISO 13443 : 1996 AMD 16149 NATURAL GAS - STANDARD REFERENCE CONDITIONS
    BS ISO 15403 : 2000 NATURAL GAS - DESIGNATION OF THE QUALITY OF NATURAL GAS FOR USE AS A COMPRESSED FUEL FOR VEHICLES
    BS EN ISO 18453 : 2005 NATURAL GAS - CORRELATION BETWEEN WATER CONTENT AND WATER DEW POINT
    PREN 437 : DRAFT 2017 TEST GASES - TEST PRESSURES - APPLIANCE CATEGORIES
    17/30363956 DC : 0 BS EN 419 - GAS-FIRED OVERHEAD LUMINOUS RADIANT HEATERS FOR NON-DOMESTIC USE - SAFETY AND ENERGY EFFICIENCY
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    UNE-ISO 7504:2016 Gas analysis. Vocabulary
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    I.S. EN 437:2003 TEST GASES - TEST PRESSURES - APPLIANCE CATEGORIES
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    BS ISO 6570 : 2001 AMD 15368 NATURAL GAS - DETERMINATION OF POTENTIAL HYDROCARBON LIQUID CONTENT - GRAVIMETRIC METHODS
    ISO/TR 24094:2006 Analysis of natural gas Validation methods for gaseous reference materials
    BS ISO 12213-1 : 1997 AMD 16146 NATURAL GAS - CALCULATION OF COMPRESSION FACTOR - INTRODUCTION AND GUIDELINES
    I.S. EN ISO 14912:2007 GAS ANALYSIS - CONVERSION OF GAS MIXTURE COMPOSITION DATA
    BS ISO 12213-2 : 1997 AMD 16147 NATURAL GAS - CALCULATION OF COMPRESSION FACTOR - CALCULATION USING A MOLAR COMPOSITION ANALYSIS
    I.S. EN ISO 15971:2014 NATURAL GAS - MEASUREMENT OF PROPERTIES - CALORIFIC VALUE AND WOBBE INDEX (ISO 15971:2008)
    06/30139641 DC : 0 EN 777-3 - MULTI-BURNER GAS-FORED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON DOMESTIC USE - PART 3: SYSTEM F - SAFETY
    UNE-EN 16726:2016 Gas infrastructure - Quality of gas - Group H
    BS ISO 6974-2 : 2001 AMD 13855 NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 2: MEASURING-SYSTEM CHARACTERISTICS AND STATISTICS FOR PROCESSING OF DATA
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    BS ISO 15970 : 2008 NATURAL GAS - MEASUREMENT OF PROPERTIES - VOLUMETRIC PROPERTIES: DENSITY, PRESSURE, TEMPERATURE AND COMPRESSION FACTOR
    ISO 7504:2015 Gas analysis Vocabulary
    DIN EN ISO 15112:2014-09 Natural gas - Energy determination (ISO 15112: 2011)
    UNE-EN 12405-3:2016 Gas meters - Conversion devices - Part 3: Flow computer
    DIN EN ISO 6974-3 E : 2002 NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 3: DETERMINATION OF HYDROGEN, HELIUM, OXYGEN, NITROGEN, CARBON DIOXIDE AND HYDROCARBONS UP TO C[8] USING TWO PACKED COLUMNS
    DIN EN ISO 6974-6 E : 2005 NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 6: DETERMINATION OF HYDROGEN, HELIUM, OXYGEN, NITROGEN, CARBON DIOXIDE AND C[1] TO C[8] HYDROCARBONS USING THREE CAPILLARY COLUMNS
    DIN EN ISO 18453:2006-01 Natural gas - Correlation between water content and water dew point (ISO 18453:2004)
    NF EN 62282 3-2 : 2006 FUEL CELL TECHNOLOGIES - PART 3-2: STATIONARY FUEL CELL POWER PLANTS - PERFORMANCE TEST METHODS
    DIN EN ISO 15971:2014-09 Natural gas - Measurement of properties - Calorific value and Wobbe index (ISO 15971:2008)
    ISO/TS 29041:2008 Gas mixtures Gravimetric preparation Mastering correlations in composition
    UNI EN ISO 15112 : 2014 NATURAL GAS - ENERGY DETERMINATION
    I.S. EN ISO 15403-1:2008 NATURAL GAS - NATURAL GAS FOR USE AS A COMPRESSED FUEL FOR VEHICLES - PART 1: DESIGNATION OF THE QUALITY
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    ISO 2314:2009 Gas turbines Acceptance tests
    S.R. CR 1404:1994 DETERMINATION OF EMISSIONS FROM APPLIANCES BURNING GASEOUS FUELS DURING TYPE-TESTING
    ISO/TR 26762:2008 Natural gas Upstream area Allocation of gas and condensate
    I.S. EN 12405-2:2012 GAS METERS - CONVERSION DEVICES - PART 2: ENERGY CONVERSION
    S.R. CEN ISO/TR 24094:2007 ANALYSIS OF NATURAL GAS - VALIDATION METHODS FOR GASEOUS REFERENCE MATERIALS
    I.S. EN ISO 15403:2005 NATURAL GAS - DESIGNATION OF THE QUALITY OF NATURAL GAS FOR USE AS A COMPRESSED FUEL FOR VEHICLES
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    I.S. EN 62282-3-2:2006 FUEL CELL TECHNOLOGIES - PART 3-2: STATIONARY FUEL CELL POWER SYSTEMS - PERFORMANCE TEST METHODS
    API MPM CH17.10.1 : 2014 MANUAL OF PETROLEUM MEASUREMENT STANDARDS - CHAPTER 17.10: MEASUREMENT OF CARGOES ON BOARD MARINE GAS CARRIERS - PART 1: LIQUEFIED NATURAL GAS
    I.S. EN 16723-2:2017 NATURAL GAS AND BIOMETHANE FOR USE IN TRANSPORT AND BIOMETHANE FOR INJECTION IN THE NATURAL GAS NETWORK - PART 2: AUTOMOTIVE FUELS SPECIFICATION
    S.R. CEN/TR 16787:2014 INDUSTRIAL GAS INSTALLATION - GUIDELINE
    I.S. EN ISO 15970:2014 NATURAL GAS - MEASUREMENT OF PROPERTIES - VOLUMETRIC PROPERTIES: DENSITY, PRESSURE, TEMPERATURE AND COMPRESSION FACTOR (ISO 15970:2008)
    UNE-EN ISO 15971:2014 Natural gas - Measurement of properties - Calorific value and Wobbe index (ISO 15971:2008)
    PREN 30-1-1 : DRAFT 2017 DOMESTIC COOKING APPLIANCES BURNING GAS - PART 1-1: SAFETY - GENERAL
    17/30332894 DC : 0 BS EN 17082 - DOMESTIC AND NON-DOMESTIC GAS-FIRED FORCED CONVECTION AIR HEATERS FOR SPACE HEATING NOT EXCEEDING A NET HEAT INPUT OF 300 KW
    I.S. EN ISO 15112:2014 NATURAL GAS - ENERGY DETERMINATION (ISO 15112:2011)
    BS ISO 14912 : 2003 GAS ANALYSIS - CONVERSION OF GAS MIXTURE COMPOSITION DATA
    BS ISO 7504:2015 GAS ANALYSIS - VOCABULARY
    ISO 19970:2017 Refrigerated hydrocarbon and non-petroleum based liquefied gaseous fuels — Metering of gas as fuel on LNG carriers during cargo transfer operations
    ISO/TR 29922:2017 Natural gas Supporting information on the calculation of physical properties according to ISO 6976
    I.S. EN 62282-4-102:2017 FUEL CELL TECHNOLOGIES - PART 4-102: FUEL CELL POWER SYSTEMS FOR INDUSTRIAL ELECTRIC TRUCKS - PERFORMANCE TEST METHODS
    ONORM EN ISO 15112 : 2014 NATURAL GAS - ENERGY DETERMINATION (ISO 15112:2011)
    UNI EN ISO 15403-1 : 2008 NATURAL GAS - NATURAL GAS FOR USE AS A COMPRESSED FUEL FOR VEHICLES - PART 1: DESIGNATION OF THE QUALITY
    I.S. EN 16726:2015 GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H
    18/30369304 DC : DRAFT APR 2018 BS EN 1473 - INSTALLATION AND EQUIPMENT FOR LIQUEFIED NATURAL GAS - DESIGN OF ONSHORE INSTALLATIONS
    UNI EN 437 : 2009 TEST GASES - TEST PRESSURES - APPLIANCE CATEGORIES
    17/30349928 DC : 0 BS EN 437 - TEST GASES - TEST PRESSURES - APPLIANCE CATEGORIES
    17/30363959 DC : 0 BS EN 17175 - GAS-FIRED OVERHEAD RADIANT STRIP HEATERS AND MULTI-BURNER CONTINUOUS RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - SAFETY AND ENERGY EFFICIENCY
    UNI EN ISO 15971 : 2014 NATURAL GAS - MEASUREMENT OF PROPERTIES - CALORIFIC VALUE AND WOBBE INDEX
    NORSOK I 106:2014 FISCAL METERING SYSTEMS FOR HYDROCARBON LIQUID AND GAS
    ISO 6578:2017 Refrigerated hydrocarbon liquids Static measurement Calculation procedure
    NBR 15213 : 2008 CALCULATION OF CALORIFIC VALUES, DENSITY, RELATIVE DENSITY AND WOBBE INDEX OF COMBUSTIBLE GASES FROM COMPOSITION
    DIN EN 16726:2016-04 GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H
    ISO 15112:2011 Natural gas Energy determination
    BS PD CEN/TR 16478 : 2012 SURVEILLANCE FROM FIRST COMMISSIONING ON MEASURING DEVICES USED IN NATURAL GAS SUPPLY TO THE INSTALLATIONS OF THE ACTIVITIES UNDER THE DIRECTIVE 2003/87/EC ESTABLISHING A SCHEME OF CO[2] EMISSIONS TRADING
    API MPM CH22.6 : 2015 MANUAL OF PETROLEUM MEASUREMENT STANDARDS - CHAPTER 22.6: TESTING PROTOCOL FOR GAS CHROMATOGRAPHS
    S.R. CEN/TR 16478:2012 SURVEILLANCE FROM FIRST COMMISSIONING ON MEASURING DEVICES USED IN NATURAL GAS SUPPLY TO THE INSTALLATIONS OF THE ACTIVITIES UNDER THE DIRECTIVE 2003/87/EC ESTABLISHING A SCHEME OF CO[2] EMISSIONS TRADING
    VDI 4656:2013-09 DESIGN AND DIMENSIONING OF MICRO COMBINED HEAT AND POWER PLANTS
    DIN EN 16726 E : 2016 GAS INFRASTRUCTURE - QUALITY OF GAS - GROUP H
    17/30363953 DC : 0 BS EN 416 - GAS-FIRED OVERHEAD RADIANT TUBE HEATERS AND RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - SAFETY AND ENERGY EFFICIENCY
    04/30055562 DC : DRAFT APR 2004 ISO 20765-1 - NATURAL GAS - CALCULATION OF THERMODYNAMIC PROPERTIES - PART 1: GAS PHASE PROPERTIES FOR TRANSITION AND DISTRIBUTION APPLICATIONS
    EN 437:2003+A1:2009 TEST GASES - TEST PRESSURES - APPLIANCE CATEGORIES
    ISO 13577-2:2014 Industrial furnaces and associated processing equipment Safety Part 2: Combustion and fuel handling systems
    I.S. EN ISO 6974-6:2005 NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 6: DETERMINATION OF HYDROGEN, HELIUM, OXYGEN, NITROGEN, CARBON DIOXIDE AND C[1] TO C[8] HYDROCARBONS USING THREE CAPILLARY COLUMNS
    I.S. EN ISO 18453:2005 NATURAL GAS - CORRELATION BETWEEN WATER CONTENT AND WATER DEW POINT
    ISO 20765-2:2015 Natural gas Calculation of thermodynamic properties Part 2: Single-phase properties (gas, liquid, and dense fluid) for extended ranges of application
    IEC 62282-4-102:2017 Fuel cell technologies - Part 4-102: Fuel cell power systems for industrial electric trucks - Performance test methods
    ISO 16110-2:2010 Hydrogen generators using fuel processing technologies Part 2: Test methods for performance
    I.S. EN ISO 6974-3:2002 NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 3: DETERMINATION OF HYDROGEN, HELIUM, OXYGEN, NITROGEN, CARBON DIOXIDE AND HYDROCARBONS UP TO C[8] USING TWO PACKED COLUMNS
    IEC 62282-3-201:2017 Fuel cell technologies - Part 3-201: Stationary fuel cell power systems - Performance test methods for small fuel cell power systems
    EN 676:2003+A2:2008/AC:2008 AUTOMATIC FORCED DRAUGHT BURNERS FOR GASEOUS FUELS
    I.S. EN 676:2003 AUTOMATIC FORCED DRAUGHT BURNERS FOR GASEOUS FUELS
    DIN EN 746-2:2011-02 Industrial thermoprocessing equipment - Part 2: Safety requirements for combustion and fuel handling systems
    DIN EN ISO 6570:2004-12 Natural gas - Determination of potential hydrocarbon liquid content - Gravimetric methods (ISO 6570:2001); German version EN ISO 6570:2004
    DIN EN 12953-11:2003-12 SHELL BOILERS - PART 11: ACCEPTANCE TESTS
    DIN EN 1020:2010-05 NON-DOMESTIC FORCED CONVECTION GAS-FIRED AIR HEATERS FOR SPACE HEATING NOT EXCEEDING A NET HEAT INPUT OF 300 KW INCORPORATING A FAN TO ASSIST TRANSPORTATION OF COMBUSTION AIR OR COMBUSTION PRODUCTS
    DIN EN 1319:2010-06 DOMESTIC GAS-FIRED FORCED CONVECTION AIR HEATERS FOR SPACE HEATING, WITH FAN-ASSISTED BURNERS NOT EXCEEDING A NET HEAT INPUT OF 70 KW
    DIN EN 416-1:2009-09 SINGLE BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATERS FOR NON-DOMESTIC USE - PART 1: SAFETY
    DIN EN 777-1:2009-09 MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - PART 1: SYSTEM D - SAFETY
    DIN EN 12953-7:2002-08 Shell boilers - Part 7: Requirements for firing systems for liquid and gaseous fuels for the boiler; German version EN 12953-7:2002
    DIN EN ISO 12213-3:2010-01 Natural gas - Calculation of compression factor - Part 3: Calculation using physical properties (ISO 12213-3:2006)
    DIN EN 777-3:2009-09 MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON DOMESTIC USE - PART 3: SYSTEM F - SAFETY
    DIN EN 12952-8:2002-08 WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - PART 8: REQUIREMENTS FOR FIRING SYSTEMS FOR LIQUID AND GASEOUS FUELS FOR THE BOILER
    DIN EN 777-4:2009-09 MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - PART 4: SYSTEM H - SAFETY
    DIN EN 777-2:2009-09 MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - PART 2: SYSTEM E - SAFETY
    DIN EN 419-1:2009-07 NON-DOMESTIC GAS-FIRED OVERHEAD LUMINOUS RADIANT HEATERS - PART 1: SAFETY
    DIN EN ISO 12213-1:2010-01 Natural gas - Calculation of compression factor - Part 1: Introduction and guidelines (ISO 12213-1:2006)
    DIN EN ISO 6974-5 E : 2002 NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 5: ISOTHERMAL METHOD FOR NITROGEN, CARBON DIOXIDE, C[1] TO C[5] HYDROCARBONS AND C[6+] HYDROCARBONS (ISO 6974-5:2014)
    DIN EN ISO 12213-2:2010-01 Natural gas - Calculation of compression factor - Part 2: Calculation using molar-composition analysis (ISO 12213-2:2006)
    DIN EN 30-1-1:2013-06 Domestic cooking appliances burning gas - Part 1-1: Safety - General (includes Amendment 1:2013)
    DIN EN 525:2009-11 NON-DOMESTIC DIRECT GAS-FIRED FORCED CONVECTION AIR HEATERS FOR SPACE HEATING NOT EXCEEDING A NET HEAT INPUT OF 300 KW
    DIN EN 778:2010-03 DOMESTIC GAS-FIRED FORCED CONVECTION AIR HEATERS FOR SPACE HEATING NOT EXCEEDING A NET HEAT INPUT OF 70 KW, WITHOUT A FAN TO ASSIST TRANSPORTATION OF COMBUSTION AIR AND/OR COMBUSTION PRODUCTS
    DIN EN ISO 13686:2013-12 NATURAL GAS - QUALITY DESIGNATION (ISO 13686:2013)
    DIN EN ISO 6974-4 E : 2002 NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 4: DETERMINATION OF NITROGEN, CARBON DIOXIDE AND C[1] TO C[5] AND C[6+] HYDROCARBONS FOR A LABORATORY AND ON-LINE MEASURING SYSTEM USING TWO COLUMNS
    DIN EN ISO 9300 E : 2005 MEASUREMENT OF GAS FLOW BY MEANS OF CRITICAL FLOW - VENTURI NOZZLES
    DIN EN 12952-15 E : 2004 WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - PART 15: ACCEPTANCE TESTS
    UNE-EN ISO 6974-5:2015 Natural gas - Determination of composition and associated uncertainty by gas chromatography - Part 5: Isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons (ISO 6974-5:2014)
    BS EN 12952-15 : 2003 WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - PART 15: ACCEPTANCE TESTS
    UNE-EN 525:2010 Non-domestic direct gas-fired forced convection air heaters for space heating not exceeding a net heat input of 300 kW
    BS EN ISO 12213-3 : 2009 NATURAL GAS - CALCULATION OF COMPRESSION FACTOR - PART 3: CALCULATION USING PHYSICAL PROPERTIES
    BS EN ISO 6570 : 2004 NATURAL GAS - DETERMINATION OF POTENTIAL HYDROCARBON LIQUID CONTENT - GRAVIMETRIC METHODS
    BS EN 416-1:2009 Single burner gas-fired overhead radiant tube heaters for non-domestic use Safety
    BS EN ISO 13686 : 2013 NATURAL GAS - QUALITY DESIGNATION (ISO 13686:2013)
    IEC 62282-3-2:2006 Fuel cell technologies - Part 3-2: Stationary fuel cell power systems - Performance test methods
    BS EN ISO 9300:2005 Measurement of gas flow by means of critical flow Venturi nozzles
    ISO 13686:2013 Natural gas Quality designation
    ISO 9300:2005 Measurement of gas flow by means of critical flow Venturi nozzles
    BS EN 621:2009 Non-domestic gas-fired forced convection air heaters for space heating not exceeding a net heat input of 300 kW, without a fan to assist transportation of combustion air and/or combustion products
    BS EN 12669 : 2000 DIRECT GAS-FIRED HOT AIR BLOWERS FOR USE IN GREENHOUSES AND SUPPLEMENTARY NON-DOMESTIC SPACE HEATING
    BS EN 12953-7:2002 Shell boilers Requirements for firing systems for liquid and gaseous fuels for the boilers
    BS EN 12838 : 2000 INSTALLATIONS AND EQUIPMENT FOR LIQUIFIED NATURAL GAS - SUITABILITY TESTING OF LNG SAMPLING SYSTEMS
    ISO 14111:1997 Natural gas Guidelines to traceability in analysis
    IEC 62282-3-200:2015 Fuel cell technologies - Part 3-200: Stationary fuel cell power systems - Performance test methods
    BS EN 12752-1:1999 Gas-fired type B tumble dryers of nominal heat input not exceeding 20 kW Safety
    BS EN ISO 6974-5 : 2014 NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 5: ISOTHERMAL METHOD FOR NITROGEN, CARBON DIOXIDE, C[1] TO C[5] HYDROCARBONS AND C[6+] HYDROCARBONS
    BS EN 525:2009 Non-domestic direct gas-fired forced convection air heaters for space heating not exceeding a net heat input of 300 kW
    UNE-EN ISO 13686:2014 Natural gas - Quality designation (ISO 13686:2013)
    UNE-EN 1458-1:2012 Domestic direct gas-fired tumble dryers of types B22D and B23D, of nominal heat input not exceeding 6 kW - Part 1: Safety
    ISO 19859:2016 Gas turbine applications Requirements for power generation
    BS EN 746-2 : 2010 INDUSTRIAL THERMOPROCESSING EQUIPMENT - PART 2: SAFETY REQUIREMENTS FOR COMBUSTION AND FUEL HANDLING SYSTEMS
    BS EN ISO 12213-1 : 2009 NATURAL GAS - CALCULATION OF COMPRESSION FACTOR - PART 1: INTRODUCTION AND GUIDELINES
    BS EN ISO 14111 : 1999 NATURAL GAS - GUIDELINES TO TRACEABILITY IN ANALYSIS
    BS EN 419-1:2009 Non-domestic gas-fired overhead luminous radiant heaters Safety
    BS EN 1458-1:2011 Domestic direct gas-fired tumble dryers of types B22D and B23D, of nominal heat input not exceeding 6 kW Safety
    14/30244780 DC : 0 BS ISO 19859 - GAS TURBINE APPLICATIONS - REQUIREMENTS FOR POWER GENERATION
    BS EN 12244-1:1998 Direct gas-fired washing machines, of nominal heat input not exceeding 20 kW Safety
    BS EN 12953-11 : 2003 SHELL BOILERS - PART 11: ACCEPTANCE TESTS
    BS EN 777-3:2009 Multi-burner gas-fired overhead radiant tube heater systems for non-domestic use System F. Safety
    BS EN 30-1-1 : 2008 DOMESTIC COOKING APPLIANCES BURNING GAS - PART 1-1: SAFETY - GENERAL
    BS EN 1319:2009 Domestic gas-fired forced convection air heaters for space heating, with fan-assisted burners not exceeding a net heat input of 70 kW
    BS EN ISO 12213-2 : 2009 NATURAL GAS - CALCULATION OF COMPRESSION FACTOR - PART 2: CALCULATION USING MOLAR-COMPOSITION ANALYSIS
    BS EN ISO 6974-4 : 2001 NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 4: DETERMINATION OF NITROGEN, CARBON DIOXIDE AND C1 TO C5 AND C6+ HYDROCARBONS FOR A LABORATORY AND ON-LINE MEASURING SYSTEM USING TWO COLUMNS
    BS EN 777-2 : 2009 MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - PART 2: SYSTEM E - SAFETY
    ISO 12213-1:2006 Natural gas Calculation of compression factor Part 1: Introduction and guidelines
    ISO 6974-6:2002 Natural gas Determination of composition with defined uncertainty by gas chromatography Part 6: Determination of hydrogen, helium, oxygen, nitrogen, carbon dioxide and C1 to C8 hydrocarbons using three capillary columns
    UNE-EN 1776:2017 Gas infrastructure - Gas measuring systems - Functional requirements
    BS EN 1776:2015 GAS INFRASTRUCTURE - GAS MEASURING SYSTEMS - FUNCTIONAL REQUIREMENTS
    ISO 6570:2001 Natural gas Determination of potential hydrocarbon liquid content Gravimetric methods
    BS EN 777-4:2009 Multi-burner gas-fired overhead radiant tube heater systems for non-domestic use System H. Safety
    BS EN 777-1:2009 Multi-burner gas-fired overhead radiant tube heater systems for non-domestic use System D. Safety
    UNE-EN ISO 10723:2013 Natural gas - Performance evaluation for analytical systems (ISO 10723:2012)
    BS EN ISO 13443 : 2005 NATURAL GAS - STANDARD REFERENCE CONDITIONS
    ISO 12213-3:2006 Natural gas Calculation of compression factor Part 3: Calculation using physical properties
    ISO 12213-2:2006 Natural gas Calculation of compression factor Part 2: Calculation using molar-composition analysis
    ISO 10723:2012 Natural gas Performance evaluation for analytical systems
    DIN EN ISO 9300:2005-11 Measurement of gas flow by means of critical flow Venturi nozzles (ISO 9300:2005)
    UNE-EN 1020:2010 Non-domestic forced convection gas-fired air heaters for space heating not exceeding a net heat input of 300 kW incorporating a fan to assist transportation of combustion air or combustion products
    ISO 14912:2003 Gas analysis — Conversion of gas mixture composition data
    BS ISO 19859 : 2016 GAS TURBINE APPLICATIONS - REQUIREMENTS FOR POWER GENERATION
    ISO 15403-1:2006 Natural gas Natural gas for use as a compressed fuel for vehicles Part 1: Designation of the quality
    ISO 13443:1996 Natural gas Standard reference conditions
    UNE-EN ISO 12213-1:2010 Natural gas - Calculation of compression factor - Part 1: Introduction and guidelines (ISO 12213-1:2006)
    UNE-EN 30-1-1:2009 Domestic cooking appliances burning gas - Part 1-1: Safety - General
    BS EN 676 : 2003 AUTOMATIC FORCED DRAUGHT BURNERS FOR GASEOUS FUELS
    UNE-EN ISO 12213-2:2010 Natural gas - Calculation of compression factor - Part 2: Calculation using molar-composition analysis (ISO 12213-2:2006)
    ISO 6974-4:2000 Natural gas Determination of composition with defined uncertainty by gas chromatography Part 4: Determination of nitrogen, carbon dioxide and C1 to C5 and C6+ hydrocarbons for a laboratory and on-line measuring system using two columns
    DIN EN 12952-15:2004-01 Water tube boilers and auxiliary installations - Part 15: Acceptance tests; German version EN 12952-15:2003
    DIN EN ISO 6974-5:2014-10 NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 5: ISOTHERMAL METHOD FOR NITROGEN, CARBON DIOXIDE, C[1] TO C[5] HYDROCARBONS AND C[6+] HYDROCARBONS (ISO 6974-5:2014)
    UNE-EN ISO 12213-3:2010 Natural gas - Calculation of compression factor - Part 3: Calculation using physical properties (ISO 12213-3:2006)
    BS EN ISO 10723 : 2012 NATURAL GAS - PERFORMANCE EVALUATION FOR ANALYTICAL SYSTEMS
    ISO 6974-5:2014 Natural gas Determination of composition and associated uncertainty by gas chromatography Part 5: Isothermal method for nitrogen, carbon dioxide, C1 to C5 hydrocarbons and C6+ hydrocarbons
    UNE-EN 778:2010 Domestic gas-fired forced convection air heaters for space heating not exceeding a net heat input of 70 kW, without a fan to assist transportation of combustion air and/or combustion products
    BS EN 12952-8:2002 Water-tube boilers and auxiliary installations Requirements for firing systems for liquid and gaseous fuels for the boiler
    BS ISO 13577-2:2014 Industrial furnaces and associated processing equipment. Safety Combustion and fuel handling systems
    ISO 15970:2008 Natural gas Measurement of properties Volumetric properties: density, pressure, temperature and compression factor
    BS EN 1020:2009 Non-domestic forced convection gas-fired air heaters for space heating not exceeding a net heat input of 300 kW incorporating a fan to assist transportation of combustion air or combustion products
    DIN EN 676:2008-11 Automatic forced draught burners for gaseous fuels (includes Amendment A2:2008)
    I.S. EN 777-4:2009 MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - PART 4: SYSTEM H - SAFETY
    I.S. EN 525:2009 NON-DOMESTIC DIRECT GAS-FIRED FORCED CONVECTION AIR HEATERS FOR SPACE HEATING NOT EXCEEDING A NET HEAT INPUT OF 300 KW
    I.S. EN 777-2:2009 MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - PART 2: SYSTEM E - SAFETY
    I.S. EN 416-1:2009 SINGLE BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATERS FOR NON-DOMESTIC USE - PART 1: SAFETY
    I.S. EN 777-3:2009 MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON DOMESTIC USE - PART 3: SYSTEM F - SAFETY
    I.S. EN 1319:2009 DOMESTIC GAS-FIRED FORCED CONVECTION AIR HEATERS FOR SPACE HEATING, WITH FAN-ASSISTED BURNERS NOT EXCEEDING A NET HEAT INPUT OF 70 KW
    EN ISO 6974-3 : 2001 NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 3: DETERMINATION OF HYDROGEN, HELIUM, OXYGEN, NITROGEN, CARBON DIOXIDE AND HYDROCARBONS UP TO C[8] USING TWO PACKED COLUMNS
    I.S. EN 419-1:2009 NON-DOMESTIC GAS-FIRED OVERHEAD LUMINOUS RADIANT HEATERS - PART 1: SAFETY
    I.S. EN 621:2009 NON-DOMESTIC GAS-FIRED FORCED CONVECTION AIR HEATERS FOR SPACE HEATING NOT EXCEEDING A NET HEAT INPUT OF 300 KW, WITHOUT A FAN TO ASSIST TRANSPORTATION OF COMBUSTION AIR AND/OR COMBUSTION PRODUCTS
    EN ISO 15112 : 2014 NATURAL GAS - ENERGY DETERMINATION (ISO 15112:2011)
    I.S. EN 778:2009 DOMESTIC GAS-FIRED FORCED CONVECTION AIR HEATERS FOR SPACE HEATING NOT EXCEEDING A NET HEAT INPUT OF 70 KW, WITHOUT A FAN TO ASSIST TRANSPORTATION OF COMBUSTION AIR AND/OR COMBUSTION PRODUCTS
    I.S. EN 777-1:2009 MULTI-BURNER GAS-FIRED OVERHEAD RADIANT TUBE HEATER SYSTEMS FOR NON-DOMESTIC USE - PART 1: SYSTEM D - SAFETY
    I.S. EN 1020:2009 NON-DOMESTIC FORCED CONVECTION GAS-FIRED AIR HEATERS FOR SPACE HEATING NOT EXCEEDING A NET HEAT INPUT OF 300 KW INCORPORATING A FAN TO ASSIST TRANSPORTATION OF COMBUSTION AIR OR COMBUSTION PRODUCTS
    I.S. EN 30-1-1:2008 DOMESTIC COOKING APPLIANCES BURNING GAS - PART 1-1: SAFETY - GENERAL
    I.S. EN 12244-1:1998 DIRECT GAS-FIRED WASHING MACHINES, OF NOMINAL HEAT INPUT NOT EXCEEDING 20 KW - PART 1: SAFETY
    I.S. EN ISO 10723:2012 NATURAL GAS - PERFORMANCE EVALUATION FOR ANALYTICAL SYSTEMS (ISO 10723:2012)
    I.S. EN 12669:2000 DIRECT GAS-FIRED HOT AIR BLOWERS FOR USE IN GREENHOUSES AND SUPPLEMENTARY NON-DOMESTIC SPACE HEATING
    I.S. EN ISO 9300:2005 MEASUREMENT OF GAS FLOW BY MEANS OF CRITICAL FLOW VENTURI NOZZLES
    DIN EN 1776:2016-05 GAS INFRASTRUCTURE - GAS MEASURING SYSTEMS - FUNCTIONAL REQUIREMENTS
    DIN EN ISO 10723:2013-04 NATURAL GAS - PERFORMANCE EVALUATION FOR ANALYTICAL SYSTEMS (ISO 10723:2012)
    I.S. EN 746-2:2010 INDUSTRIAL THERMOPROCESSING EQUIPMENT - PART 2: SAFETY REQUIREMENTS FOR COMBUSTION AND FUEL HANDLING SYSTEMS
    I.S. EN ISO 12213-2:2009 NATURAL GAS - CALCULATION OF COMPRESSION FACTOR - PART 2: CALCULATION USING MOLAR-COMPOSITION ANALYSIS
    I.S. EN ISO 6974-5:2014 NATURAL GAS - DETERMINATION OF COMPOSITION AND ASSOCIATED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 5: ISOTHERMAL METHOD FOR NITROGEN, CARBON DIOXIDE, C[1] TO C[5] HYDROCARBONS AND C[6+] HYDROCARBONS (ISO 6974-5:2014)
    I.S. EN ISO 12213-1:2009 NATURAL GAS - CALCULATION OF COMPRESSION FACTOR - PART 1: INTRODUCTION AND GUIDELINES
    I.S. EN ISO 12213-3:2009 NATURAL GAS - CALCULATION OF COMPRESSION FACTOR - PART 3: CALCULATION USING PHYSICAL PROPERTIES
    I.S. EN 1458-1:2011 DOMESTIC DIRECT GAS-FIRED TUMBLE DRYERS OF TYPES B22D AND B23D, OF NOMINAL HEAT INPUT NOT EXCEEDING 6 KW - PART 1: SAFETY
    I.S. EN 12752-1:2000 GAS-FIRED TYPE B TUMBLE DRYERS OF NOMINAL HEAT INPUT NOT EXCEEDING 20 KW - PART 1: SAFETY
    I.S. EN 1776:2015 GAS INFRASTRUCTURE - GAS MEASURING SYSTEMS - FUNCTIONAL REQUIREMENTS
    I.S. EN ISO 13686:2013 NATURAL GAS - QUALITY DESIGNATION (ISO 13686:2013)
    EN 12405-2 : 2012 GAS METERS - CONVERSION DEVICES - PART 2: ENERGY CONVERSION
    EN 12669:2000 DIRECT GAS-FIRED HOT AIR BLOWERS FOR USE IN GREENHOUSES AND SUPPLEMENTARY NON-DOMESTIC SPACE HEATING
    EN 12953-11 : 2003 SHELL BOILERS - PART 11: ACCEPTANCE TESTS
    EN 30-1-1:2008+A3:2013 DOMESTIC COOKING APPLIANCES BURNING GAS - PART 1-1: SAFETY - GENERAL
    EN 62282-3-200:2016 (edition 2) Fuel cell technologies - Part 3-200: Stationary fuel cell power systems - Performance test methods
    DIN EN ISO 6974-4:2002-06 NATURAL GAS - DETERMINATION OF COMPOSITION WITH DEFINED UNCERTAINTY BY GAS CHROMATOGRAPHY - PART 4: DETERMINATION OF NITROGEN, CARBON DIOXIDE AND C[1] TO C[5] AND C[6+] HYDROCARBONS FOR A LABORATORY AND ON-LINE MEASURING SYSTEM USING TWO COLUMNS
    CEN/TR 16478 : 2012 SURVEILLANCE FROM FIRST COMMISSIONING ON MEASURING DEVICES USED IN NATURAL GAS SUPPLY TO THE INSTALLATIONS OF THE ACTIVITIES UNDER THE DIRECTIVE 2003/87/EC ESTABLISHING A SCHEME OF CO[2] EMISSIONS TRADING