1 Scope
This Technical Report establishes minimum provisions for the surveillance, based on
available standards from first commissioning, of devices and systems with measuring
function throughout their technical life when used in the activities of the categories
listed in the Annex I of the European Directive 2003/87/EC. It does so in order to
ensure the compliance with the expected maximum allowable difference of indication.
This Technical Report applies to devices/systems with the function to measure:
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— volumetric or mass amount of natural gas consumption (any type of gas meters),
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— volumetric amount of natural gas consumption at specified base conditions (conversion devices),
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— composition of natural gas (gas chromatographs),
for calculating, in accordance with the applicable provisions of the guidelines C(2007)
3416, the amount of the CO2 emissions from the source stream of natural gas.
Users of this document should be aware that more detailed national recommendations/standards
and/or codes of practice as well as national measures possibly approved by National
Regulator may exist inside the EU Member States.
When national regulations have to be applied, this document should not be considered.
Except in the aforementioned case, this Technical Report is intended to be applied
in association with applicable national recommendations/standards and/or codes of
practice setting out the above mentioned surveillance provisions.
In the event of conflict in terms of different requirements in national regulations/standards
and in the provisions of this document, the national regulations/standards will take
precedence.
Referring to the aforesaid Commission's guidelines C(2007) 3416, SFG_I opts for the
calculation based method to determine the amount of the CO2 emissions.
Regarding commercially traded of natural gas, competent authorities may permit the
determination of the annual gas consumption leading to evaluation of CO2 emissions based solely on the invoiced amount of gas without further individual proof
of associated uncertainties, provided that national legislation or the documented
application of standards ensures that respective uncertainty requirements for activity
data are met for commercial transactions (guidelines C(2007) 3416 -annex 1 §7).
Referring to 5.2 and to Chapter 16, annex 1 of guidelines C(2007) 3416, for installations
with "de minimis" souce streams and with low emissions respectively, the provisions
of this document can be waived.