ha-EbbE E 006200 E06T59h 25-05 W_73-02 3993 (TSO International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAA OPFAHW3ALWH IO CTAHAAPTW3ALWW-ORGANISATION INTERNATIONALE DE NORMALISATION Liquefied petroleum gas and light hydrocarbons Determination of density or relative density - Pressure hydrometer method Gaz de petrole liquéfiés et hydrocarbures légers -- Détermination de la masse volumique ou de la densite relative -- Methode de I'areometre sous pression First edition - 1984-08-01 UDC 665.725 : 531.754.3 Ref. No. ISO 3993-1984 (E) ISO 3993-1984 (E) Descriptors : petroleum products, liquefied petroleum gases, hydrocarbons, tests, physical tests, determination, density (mass/volume), hydrometers, test equipment. Price based on 6 pages EOPYRIGHT International Organization for Standardization icensedby1 hg-Eb6E T086200 E06T5h Foreword ISo (the International Organization for Standardization) is a woridwide federation of national standards bodies (IsO member bodies). The work of developing International Standards is carried out through Iso technicai committees. Every member body interested in a subject for which a technical committee has been authorized 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 the ISO Council. International Standard ISO 3993 was developed by Technical Committee ISO/TC 28, Petroleum products and lubricants, and was circulated to the member bodies in March 1983. Sri Lanka Austria Iran Australia Iraq Sweden Belgium Israel Switzerland Brazil Italy Turkey Canada Japan United Kingdom China Netherlands USA Egypt, Arab Rep. of USSR Norway Venezuela Germany, F. R. Peru .Hungary Romania India South Africa, Rep. of The member body of the foliowing country expressed disapproval of the document on technical grounds : France International Organization for Standardization, 1984 Printed in Switzerland CoPYRIGHT International Organization for Standardization Licensed by Information Handling Services ha-ebbe 4851903 0029802 ISO 3993-1984 (E) INTERNATIONAL STANDARD Liquefied petroleum gas and light hydrocarbons Determination of density or relative density - Pressure hydrometer method 1 Scope and field of application When reporting the density, the unit of density used, together with the temperature, shall be explicitly stated, for example This International Standard specifies a method for the kilogram per metre cubed or gram per millitre at t oc (see the determination of density or relative density of liquefied note). The standard reference temperature for international petroleum gases and other light hydrocarbons. The prescribed trade in petroleum and its products is 15 °c (see IS0 5024); but apparatus shall not be used for materials having gauge vapour other reference temperatures may be required for legal pressures higher than 1,4 MPa1) (14 bar) (absolute vapour metrology or other special purposes. pressure 1,5 MPa) at the test temperature. NOTE - n this international Standard, the preferred unit is the CAUTION - Attention is drawn to the hazards en- kilogram per metre cubed, but provision is also made for the use of the countered when working with liquefied petroleum gas or gram per millilitre. light hydrocarbons. The requirements of any national, local or domestic safety code should always be strictly 2.2 relative density (this term now replaces the former term observed. specific gravity) : The ratio of the mass of a volume of the liquid at a temperature t to the mass of an equal volume of pure 1.2Alternative calibration procedures are described, but only Water at a temperature t2, i.e. the ratio of the density of the fi- the one using a certified hydrometer is suitable for the deter. quid at a temperature ti to the