8681 International Standard (ISO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEKAYHAPOAHAR OPTAHU3AUMA HO CTAHAAPTW3AUWW·ORGANISATION INTE RNATIONALE DE NORMALISATION Petroleum products and lubricants Method of classification - Definition of classes Produits pétroliers et lubrifiants - Systeme de classification - Definition des classes de produits First edition - 1986-11-15 (3) UDC 665.7.001.33 Ref.No.ISO 8681-1986 (E) 1986 Descriptors : petroleum products, classification. 8681-1 Pricebased on3pages No reproduction or networking permited without license from IHS Not for Resale Foreword iSo (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with ISo procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 8681 was prepared by Technical Committee ISO/TC 28, Petroleumproducts and lubricants. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. International Organization for Standardization, 1986 Printed in Switzerland No reproduction or networking permitted without license from IHS Not for Resale ISO8681-1986 (E) INTERNATIONALSTANDARD Petroleum products and lubricants - Method of classification - Definition of classes 1 Scope and field of application classified firstly by type and secondly by end use (see ISO 8216/0). This International Standard 3.2 The principle of this classification is based on assigning a establishes the general classification system which ap- plies to petroleum products, lubricants and related pro- prefix letter which characterizes the main classes of petroleum ducts; products. In this classification system, products are designated in a defines the classes of petroleum products, lubricants and related products together with their designation. uniformmanner.The completedesignation consists of The rules of this classification system to apply to each class of the initials ISO; product concerned will be specified in the relevant International the class of the petroleum product or related product, Standard. designated by a letter (see the table in clause 4). This prefix letter shall be clearly separated from the other symbols; 2 References the category, designated by a group of letters (1 to 4) the first letter of which always identifies the family. Any ISo 6743/0, Lubricants, industrial oils and related products following letters taken separately may or may not have a (classL) -Classification-PartO:General. significance of their own but will be defined, in each case, in the International Standard giving the detailed classification ISO8216/0. Petroleumproducts Fuels(classF) of the family or category concerned; Classification-PartO:General. numbers, which may be added to complete the designation. Their significance will be defined in the rele- General system of classification vant International Standard. Explanation of symbols used The code shall be presented in the following general form : 3.1 As far as possible, the criterion selected for the establish- ment of a classification should be the field of application. This ISO-CLASS-CATEGORY-NUMBERS (if any) criterion was adopted for lubricants (see IS0 6743/0). In cer. tain circumstances,this criterion may not be appropriate; in or in the abbreviated form : such cases, a classification may be bas