{
  "url": "https://openlegislation.uk/eu-regulation-2010-406/annex-IV/part-2/division-3/division-3.11",
  "json_url": "https://openlegislation.uk/eu-regulation-2010-406/annex-IV/part-2/division-3/division-3.11.json",
  "legislation": "eur/2010/406",
  "legislation_title": "Commission Regulation (EU) No 406/2010 of 26 April 2010 implementing Regulation (EC) No 79/2009 of the European Parliament and of the Council on type-approval of hydrogen-powered motor vehicles (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2010-406",
  "path": "annex/IV/part/2/division/3/division/3.11",
  "kind": "division",
  "number": "3.11",
  "heading": "Modifications",
  "text": "Modifications may be approved in accordance with the reduced test programme specified in Table IV.3.11. Any major changes that are not covered by Table IV.3.11. shall be subjected to full approval testing.\nTable IV.3.11.\nApproval testing of modifications\nOnly when thickness change is proportional to diameter or pressure change.\nA hydrogen cycle test is not required if the stresses in the neck are equal to the original or reduced by the design change (e.g. Reducing the diameter of internal threads, or changing the boss length), the liner to boss interface is not affected, and the original materials are used for boss, liner, and seals.\nAny deviation from the parameters in the appendix to the information document as set out in Part 1 to Annex II is considered to be a change in manufacturing process.\nExplanatory notes: for example: ‘2, 3’ indicates that a test is required for type 2 and 3 containers only.\nType of test\nMaterials sections 4.1.1.-4.1.8., as applicable\nHydrogen compatibility section 4.1.7.\nBurst section 4.2.1.\nAmbient temp. pressure cycling section 4.2.2.\nLbb Performance section 4.2.3.\nBonfire section 4.2.4.\nPenetration section 4.2.5.\nChemical exposure section 4.2.6.\nComposite flaw tolerance section 4.2.7.\nAcc. Stress rupture – section 4.2.8.\nImpact damage test section 4.2.10.\nPermeation (section 4.2.12.) Boss torque (section 4.2.13.) Hydrogen cycling (section 4.2.14.)\nFibre manufacturer\n2, 3, 4\n2, 3, 4\n2, 3, 4\n2, 3, 4\n3, 4\nMetallic container or liner material\n1, 2, 3\n1, 2, 3\n1, 2, 3\n1, 2, 3\n1, 2\n1, 2, 3\n1, 2, 3\n1, 2, 3\n2, 3\n2, 3\n3\nPlastic liner material\n4\n4\n4\n4\nFibre material\n2, 3, 4\n2, 3, 4\n2, 3, 4\n2, 3, 4\n2, 3, 4\n2, 3, 4\n2, 3, 4\n2, 3, 4\n2, 3, 4\n3, 4\nResin material\n2, 3, 4\n2, 3, 4\n2, 3, 4\n2, 3, 4\n3, 4\nDiameter change ≤ 20 %\n1, 2, 3, 4\n1, 2, 3, 4\nDiameter change >20 %\n1, 2, 3, 4\n1, 2, 3, 4\n1, 2, 3, 4\n1, 2, 3, 4\n2, 3, 4\n3, 4\nLength change ≤ 50 %\n1, 2, 3, 4\n—\nLength change > 50 %\n1, 2, 3, 4\n1, 2, 3, 4\n1, 2, 3, 4\n3, 4\nNominal working pressure change ≤ 20 %\n1, 2, 3, 4\n1, 2, 3, 4\nNominal working pressure change > 20 %\n1, 2, 3, 4\n1, 2, 3, 4\n1, 2, 3, 4\n1, 2, 3, 4\n1, 2, 3, 4\nDome shape\n1, 2, 3, 4\n1, 2, 3, 4\n4\nOpening size\n1, 2, 3, 4\n1, 2, 3, 4\nCoating change\n2, 3, 4\n2, 3, 4\nEnd boss design\n4\nChange in manufacturing process\n1, 2, 3, 4\n1, 2, 3, 4\nFire protection system\n1, 2, 3, 4",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "Only when thickness change is proportional to diameter or pressure change."
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "A hydrogen cycle test is not required if the stresses in the neck are equal to the original or reduced by the design change (e.g. Reducing the diameter of internal threads, or changing the boss length), the liner to boss interface is not affected, and the original materials are used for boss, liner, and seals."
    },
    {
      "type": "footnote",
      "label": "f3",
      "text": "Any deviation from the parameters in the appendix to the information document as set out in Part 1 to Annex II is considered to be a change in manufacturing process."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2010/406/annex/IV/part/2/division/3/division/3.11",
    "retrieved_at": "2026-11-01T14:50:48.674921+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."
}