ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies).
The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 8217 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants, Subcommittee SC 4, Classifications and specifications.
This fifth edition cancels and replaces the fourth edition (ISO 8217:2010) and incorporates Technical Corrigendum ISO 8217:2010/Cor.1:2011. In addition, a normative reference to IP 570, Procedure A has been added in 7.11 for the purposes of the hydrogen sulfide test method.
Corresponding references to IP 570 have been inserted in Tables 1 and 2. In Clause 2, the list of normative references has been updated to refer readers to the most recent edition where no edition date is specified.
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