# 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), Division 3.2.5


Sufficient ductility of metallic pipes shall be proved by a bend test according to ISO 8491. Bend radius r should be r ≤ 1,3 times the outer diameter D of the pipe. Bending angle α shall be 180°. After the test no cracks shall be visible. Alternatively the pipe material shall show at least 30 % elongation at break before cold forming or at least 14 % after cold forming.

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Source: https://www.legislation.gov.uk/eur/2010/406/annex/IV/part/3/division/3/division/3.2/division/3.2.5 (the official version)
Page: https://openlegislation.uk/eu-regulation-2010-406/annex-IV/part-3/division-3/division-3.2/division-3.2.5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.