6551 International Standard (ISO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAR OPTAHM3AUMA NO CTAHAAPTW3AUWWORGANISATION INTERNATIONALE DE NORMALISATION Petroleum liquids and gases - Fidelity and security of dynamic measurement - Cabled transmission of electric and/or electronic pulsed data Liquides et gaz de pétrole -- Fidelite et sécurite des mesures dynamiques - Systemes de transmission par cables de données, sous forme d'impulsions électriques et/ou électroniques First edition - 1982-12-01 UDC 665.72/.76 : 53.08 : 681.327.77 Ref. No. 1SO 6551-1982 (E) SO 6551-1982 (E) definitions, safety requirements, designation, inspection. Price based on 12 pages Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards institutes (iso member bodies). The work of developing Inter- national Standards is carried out through ISo technical committees.Every member body interested in a subject for which a technical committee has been set up 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. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by theIsoCouncil. International Standard ISO 6551 was developed by Technical Committee IS/TC 28, Petroleum products, and was circulated to the member bodies in May 1981. It has been approved by the member bodies of the following countries : Australia Israel South Africa, Rep. of Austria Italy Spain Japan Sweden Canada Korea, Rep. of Switzerland Egypt, Arab Rep. of Mexico Turkey France Netherlands United Kingdom Germany,F.R. Norway USA Hungary Peru USSR India Poland Iran Romania No member body expressed disapproval of the document. @ International Organization for Standardization, 1982 Printed in Switzerland Copyright International Organization for Standardization hout license from IHS Not for Resale ISO 6551-1982 (E) INTERNATIONAL STANDARD Petroleum liquids and gases - Fidelity and security of dynamic measurement - Cabled transmission of electric and/or electronic pulsed data 0 Introduction bons and hydrocarbon products in the bulk commercial, royalty metering, revenue accounting and custody transfer fields in general. 0.1 Quantitative measurements are required at many stages in production, transportation,refining and marketing-of 0.4 It is not intended that these recommendations should act petroleum and its products. They form the basis of royalty. to inhibit technological progress in the industry, and therefore fiscal and custody transfer accounting and provide the means amendments may be introduced as and when required. of stock and loss control. The principles may be applied to the metering of solids. The use of agreed standardized measurement equipment and procedures obviates disputes over quantities, enabling these to be determined with an accuracy mutually acceptable to all par- 0.5 Clauses have been included on safety and other precau ties to a transaction and at the most economical cost for the tions that constitute good practice. method of measurement selected. Although every care is takento include such clauseswherever niecessary, it is impossible to cover all contingencies. In the 0.2 'During the last decade there has been a rapid increase in designing of measurement and sampling operations, attention should also be given to general codes of safe practice for the use of electrical or electronic data-transmission systems designed to facilitate the determination of physical quantities petroleum operations. The operator or other user of this such as length, mass, volume, etc. measurementstandard should work accordingto accepted safe practices and comply with all relevant regulatory requirements. Such systems can be vulnerable to disturbances arising from the environment in which they are used, and also