{
  "url": "https://openlegislation.uk/eu-regulation-2017-654/annex-IX/division-3/division-3.2/division-3.2.1",
  "json_url": "https://openlegislation.uk/eu-regulation-2017-654/annex-IX/division-3/division-3.2/division-3.2.1.json",
  "legislation": "eur/2017/654",
  "legislation_title": "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",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2017-654",
  "path": "annex/IX/division/3/division/3.2/division/3.2.1",
  "kind": "division",
  "number": "3.2.1",
  "heading": "Specification for reference fuels supplied with fixed properties (e.g. from a sealed container)",
  "text": "As an alternative to the reference fuels set out in this point, the equivalent fuels in point 3.2.2 may be used\nInerts (different from N2) + C2 + C2+.\nValue to be determined at 293,2 K (20 °C) and 101,3 kPa.\nValue to be determined at 273,2 K (0 °C) and 101,3 kPa.\nCharacteristics\nUnits\nBasis\nLimits\nTest method\nminimum\nmaximum\nReference fuel GR\nComposition:\nMethane\n87\n84\n89\nEthane\n13\n11\n15\nBalance (1)\n% mole\n—\n—\n1\nISO 6974\nSulphur content\nmg/m3 (2)\n—\n10\nISO 6326-5\nNotes:\n(1)\nInerts + C2+\n(2)\nValue to be determined at standard conditions 293,2 K (20 °C) and 101,3 kPa.\nReference fuel G23\nComposition:\nMethane\n92,5\n91,5\n93,5\nBalance (1)\n% mole\n—\n—\n1\nISO 6974\nN2\n% mole\n7,5\n6,5\n8,5\nSulphur content\nmg/m3 (2)\n—\n—\n10\nISO 6326-5\nNotes:\n(1)\nInerts (different from N2) + C2+ C2+\n(2)\nValue to be determined at 293,2 K (20 °C) and 101,3 kPa.\nReference fuel G25\nComposition:\nMethane\n% mole\n86\n84\n88\nBalance (1)\n% mole\n—\n—\n1\nISO 6974\nN2\n% mole\n14\n12\n16\nSulphur content\nmg/m3 (2)\n—\n—\n10\nISO 6326-5\nNotes:\n(1)\nInerts (different from N2) + C2+ C2+\n(2)\nValue to be determined at 293,2 K (20 °C) and 101,3 kPa.\nReference fuel G20\nComposition:\nMethane\n% mole\n100\n99\n100\nISO 6974\nBalance\n% mole\n—\n—\n1\nISO 6974\nN2\n% mole\nISO 6974\nSulphur content\nmg/m3\n—\n—\n10\nISO 6326-5\nWobbe Index (net)\nMJ/m3\n48,2\n47,2\n49,2",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "Inerts (different from N2) + C2 + C2+."
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "Value to be determined at 293,2 K (20 °C) and 101,3 kPa."
    },
    {
      "type": "footnote",
      "label": "f3",
      "text": "Value to be determined at 273,2 K (0 °C) and 101,3 kPa."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2017/654/annex/IX/division/3/division/3.2/division/3.2.1",
    "retrieved_at": "2026-11-01T14:45:01.864924+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}