{
  "url": "https://openlegislation.uk/simple-pressure-vessels-safety-regulations-2016/schedule-1/paragraph-5",
  "json_url": "https://openlegislation.uk/simple-pressure-vessels-safety-regulations-2016/schedule-1/paragraph-5.json",
  "legislation": "uksi/2016/1092",
  "legislation_title": "The Simple Pressure Vessels (Safety) Regulations 2016",
  "legislation_url": "https://openlegislation.uk/simple-pressure-vessels-safety-regulations-2016",
  "path": "schedule/1/paragraph/5",
  "kind": "paragraph",
  "number": "5",
  "heading": "Steel vessels",
  "text": "Non-alloy quality steels must meet the following requirements—\n(a) they must be non-effervescent and supplied after normalisation treatment, or in an equivalent state;\n(b) the content per product of carbon must be less than 0.25% and that of sulphur and phosphorous must each be less than 0.05%\n(c) they must have the following mechanical properties per product—\n(i) the maximum tensile strength Rm, max must be less than 580 N/mm2;\n(ii) the elongation after fracture must be:\nif test pieces are taken parallel to the direction of rolling:\nthickness ≥ 3 mm:\nA\n≥ 22%,\nthickness < 3 mm:\nA 80 mm\n≥ 17%,\nor, if test pieces are taken perpendicular to the direction of rolling:\nthickness ≥ 3 mm:\nA\n≥ 20%,\nthickness < 3 mm:\nA80 mm\n≥15%,\n(iii) the average bending rupture energy (KCV) for three longitudinal test pieces at minimum working temperature must not be less than 35 J/cm2. Not more than one of the three figures may be less than 35 J/cm2, with a minimum of 25J/cm2. In the case of steels intended to be used in the manufacture of vessels the minimum working temperature of which is lower than - 10°C and the wall thickness of which exceeds 5 mm, this property must be checked.",
  "extent": null,
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/2016/1092/schedule/1/paragraph/5",
    "retrieved_at": "2026-10-28T23:18:14.885631+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."
}