This document applies for systems for biogas production by anaerobic digestion, biogas conditioning, biogas upgrading and biogas utilization from a safety, environmental, performance and functionality perspective, during the design, manufacturing, installation, construction, testing, commissioning, acceptance, operation, regular inspection and maintenance phases.
The following topics are excluded from this document:
—    boilers, burners, furnaces and lighting in case these are not specifically applied for locally produced biogas;
—    gas fuelled engines for vehicles and ships;
—    the public gas grid;
—    specifications to determine biomethane quality;
—    transportation of compressed or liquefied biogas;
—    transportation of biomass or digestate;
—    assessment and determination whether biomass is sourced sustainably or not.
An informative explanation of the scope is included in Annex A.

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This document explains an approach for assessment of limit values for contaminants that may be found in biomethane. Limit values are generally required as an adjunct to a biomethane specification (such as parts 1 and 2 of EN 16723, or an equivalent National specification) or as part of a Network Entry Agreement for injection of biomethane into gas networks.
The methodology employed will permit derivation of limit values based solely on consideration of potential for impact on human health and does not consider other impacts, such as integrity and operation of plant and pipelines used to convey biomethane or appliances involved in its combustion or other regulations like CLP regulation. Where consideration of such impacts would result in proposing lower limit values than those based on health impacts, then the lowest limit values should generally be proposed.

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

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This document defines a Micro Gas Chromatography method for the fast and quantitative analysis of five types of terpenes in biomethane, allowing their monitoring online or offline, and covering the range from 1 ppm mol to 10 ppm mol.

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This document is applicable to the determination of the total silicon content in gaseous matrices such
as biomethane, biogas and landfill gas. Silicon is present in a gas phase contained predominantly in
siloxane compounds, trimethylsilane and trimethylsilanol. The analytical form of the silicon measured in
liquid phase after conducted sampling and derivatization procedure is soluble hexafluorosilicate anion
stable in slightly acidified media. Total silicon is expressed as a mass of silicon in the volume of the
analysed gas.
This document is applicable to all stated gas matrices with silicon concentrations up to 5 mg/m3, and it
is prevalently intended for the biomethane matrices containing (0,1 to 0,5) mg/m3. It can be used for
higher concentration but then the absorption efficiency of the bubblers/impingers should be checked
before the results can be regarded as valid. The detection limit of the method is estimated as 0,05
mg/m3 based on a sample volume of 0,020 m3. All compounds present in the gas phase are volatile at
the absorption and derivatization temperature and gaseous siloxanes are trapped in absorbance media
and derivatized into analytical silicon specie are measured by this method. The concentration of the
silicon is measured in diluted derivatization media using atomic emission spectrometer upon
atomisation/ionisation in microwave or inductively coupled plasma.

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This document applies to the design, manufacture, installation and operation of flares for the combustion of biogas. Test methods and performance requirements are also included.
Biogas systems are amongst others applied at industrial plants like food and beverage industries, waste water treatment plants, waste plants, landfill sites, small scale plants next to agricultural companies and small-scale household systems.

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This document covers the requirements for the design, installation, operation, maintenance and the safety of Household Biogas Systems (HBSs), producing biogas in an amount equivalent to an installation capacity of less than 100 MWh per year.
The document applies to HBSs comprising of pipeline and equipment with pressure levels of less than 5 kPa.
Any equipment or appliances connected to an HBS or utilizing the biogas energy of an HBS are not a part of the scope of this document.

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ISO 20675:2018 defines terms and describes classifications related to biogas production by anaerobic digestion, gasification from biomass and power to gas from biomass sources, biogas conditioning, biogas upgrading and biogas utilization from a safety, environmental, performance and functionality perspective, during the design, manufacturing, installation, construction, testing, commissioning, acceptance, operation, regular inspection and maintenance phases.
Biogas installations are, among others, applied at industrial plants like food and beverage industries, waste water treatment plants, waste plants, landfill sites, small scale plants next to agricultural companies and small scale household installations.
The following topics are excluded from this document:
-      boilers, burners, furnaces and lightening, in case these are not specifically applied for locally produced biogas;
-      gas-fuelled engines for vehicles and ships;
-      the public gas grid;
-      specifications to determine biomethane quality;
-      transportation of compressed or liquefied biogas;
-      transportation of biomass or digestate;
-      assessment and determination whether biomass is sourced sustainably or not.
ISO 20675:2018 describes the following for information purposes as well:
-      the parameters to determine the size (e.g. small, medium-sized, or large scale);
-      the parameters to determine the type of installation (e.g. domestic, industrial);
-      the parameters to describe the type of technique;
-      terms and processes in order to develop health, safety and environmental protection guidelines for biogas installations.
NOTE       For an explanation of the Scope, see Annex A.

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This document specifies the quality requirements for Liquefied Natural Gas (LNG) used as a fuel for marine applications. It defines the relevant parameters to measure as well as the required values and the test reference methods for all those parameters.
This document applies to LNG from any source, e.g. gas from conventional reservoirs, shale gas, coalbed methane, biomethane, synthetic methane. LNG described in this document can come from synthesis process out of fossil fuels or renewable sources.
This document identifies the required specifications for fuels delivered at the time and place of custody transfer (at the delivery point).

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This European Standard specifies the requirements and test methods for natural gas (group L and H, as in EN 437), biomethane and blends of both at the point of use as automotive fuels.
This European Standard applies to the previously mentioned fuels irrespective of the storage state (compressed or liquefied).
To check compliance with some requirements set by the standard, LNG or liquefied biomethane should be re-gasified prior to testing.

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