# Commission Delegated Regulation (EU) 2017/654 of 19 December 2016 supplementing Regulation (EU) 2016/1628 of the European Parliament and of the Council with regard to technical and general requirements relating to emission limits and type-approval for internal combustion engines for non-road mobile machinery, Division 9.3.2.4: Sample storage media

Extent: E+W+S+N.I.

In the case of bag sampling, gas volumes shall be stored in sufficiently clean containers that minimally off-gas or allow permeation of gases. Good engineering judgment shall be used to determine acceptable thresholds of storage media cleanliness and permeation. To clean a container, it may be repeatedly purged and evacuated and may be heated. A flexible container (such as a bag) within a temperature-controlled environment, or a temperature controlled rigid container that is initially evacuated or has a volume that can be displaced, such as a piston and cylinder arrangement, shall be used. Containers meeting the specifications in the following Table 6.6 shall be used.
Table 6.6
Gaseous Batch Sampling Container Materials
As long as aqueous condensation in storage container is prevented.
Up to 313 K (40 °C).
Up to 475 K (202 °C).
At 464 ± 11 K (191 ± 11 °C).
CO, CO2, O2, CH4, C2H6, C3H8, NO, NO2
polyvinyl fluoride (PVF) for example TedlarTM, polyvinylidene fluoride for example KynarTM, polytetrafluoroethylene for example TeflonTM, or stainless steel
HC
polytetrafluoroethylene or stainless steel

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Source: https://www.legislation.gov.uk/eur/2017/654/annex/VI/division/9/division/9.3/division/9.3.2/division/9.3.2.4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-654/annex-VI/division-9/division-9.3/division-9.3.2/division-9.3.2.4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.