ISO 6073

INTERNATIONALSTANDARD ISO 6073 Second edition 1997-12-15 This is a free 5 page sample. Access the full version online. Petroleum products — Prediction of the bulk moduli of petroleum fluids used in hydraulic fluid power systems Produits pétroliers — Détermination des modules de compressibilité volumique des fluides pétroliers pour systèmes de transmission hydraulique A www.standards.com.au Copyright ISO Reference number ISO 6073:1997(E) www.isostandards.com.au which has been technically revised. © ISO 1997 All rights reserved.isostandards. without permission in writing from the publisher. in liaison with ISO. also take part in the work. electronic or mechanical.com. Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). a=400net. Petroleum products.standards. including photocopying and microfilm.400 c=ch. o=isocs. p=iso. The work of preparing International Standards is normally carried out through ISO technical committees. International organizations. International Standard ISO 6073 was prepared by Technical Committee ISO/TC 28. no part of this publication may be reproduced or utilized in any form or by any means. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.au Copyright ISO www. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.au . s=central Printed in Switzerland ii www.ISO 6073:1997(E) This is a free 5 page sample. governmental and nongovernmental. This second edition cancels and replaces the first edition (ISO 6073:1980). International Organization for Standardization Case postale 56 • CH-1211 Genève 20 • Switzerland Internet central@iso. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Unless otherwise specified. Access the full version online. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.ch X.com. Annexes A and B of this International Standard are for information only. 2 Normative references The following standards contain provisions which. constitute provisions of this International Standard.Determination of density or relative density . ISO 91-1:1992. with a pressure range of approximately 100 kPa to 700 MPa. Petroleum measurement tables . This International Standard provides graphical techniques to obtain moduli of such fluids without using extended calculations and with the accuracy that would be required for the practical calculation of hydraulic system parameters.au . Access the full version online.au Copyright ISO www. ISO 12185:1996. 1 Scope This International Standard specifies a procedure for predicting the bulk moduli of petroleum or hydrocarbon oils used as fluids (in the absence of air bubbles) in hydraulic fluid power systems and for other purposes.standards. Members of IEC and ISO maintain registers of currently valid International Standards.com. All standards are subject to revision. At the time of publication. and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Annex A gives some example calculations. through reference in this text.isostandards. Crude petroleum and liquid or solid petroleum products .INTERNATIONAL STANDARD © ISO 6073:1997(E) ISO Petroleum products — Prediction of the bulk moduli of petroleum fluids used in hydraulic fluid power systems This is a free 5 page sample. The useful temperature range is from 0 °C to 270 °C. Crude petroleum and petroleum products . Crude petroleum and liquid petroleum products Laboratory determination of density or relative density . 1 www.Part 1: Tables based on reference temperatures of 15 degrees C and 60 degrees F. the editions indicated were valid.com.Oscillating U-tube method.Capillary-stoppered pyknometer and graduated bicapillary pycnometer methods. ISO 3838:1983.Determination of density .Hydrometer method. ISO 3675:1993. It applies under conditions where pressure changes are rapid and there is no opportunity for the temperature to reach equilibrium. 4.au Copyright ISO www.com.2.3.ISO 6073:1997(E) 3 © ISO Principle A bulk modulus is selected according to the problem and conditions of operation.1 BS . the following 4.isostandards. .V(∂p/∂V )T KT >BT except at atmospheric pressure. data based on equilibrium 4. 4 Definitions For the purposes definitions apply: of this International Standard. resulting from pressure change from atmospheric to the working pressure.V0[(p .V)]T 4. if other units are used.standards. KT = modulus.au .2.3 isentropic bulk modulus: The volumetric modulus of elasticity under conditions of constant entropy. BT = .com.V)]S isentropic tangent bulk modulus (KS): Defined as 4. The units shown are those preferred. the outcome of some multiples will be affected. and the predicted value is obtained from the determination of density and reference to one or more of the nomographic figures provided.p0)/(V0 . where KT0 = BT0 4. Access the full version online.1 bulk modulus: The measure of resistance to compressibility of a fluid taken as the reciprocal of the compressibility. This is a free 5 page sample. 2 www.p0)/(V0 . isentropic secant bulk modulus (BS): Defined as 4.2 isothermal tangent bulk modulus (KT): The bulk representing the true rate of change at the working pressure.3.2 KS 5 = = .1 isothermal secant bulk modulus (BT): The bulk modulus.V0[(p .2 isothermal bulk modulus: Modulus conditions and constant temperature.V(∂p/∂V)S Symbols and units The following symbols are used in the text and figures of this International Standard. 1 The densities determined above are at atmospheric pressure. A line drawn vertically from this point gives values of the isothermal secant bulk modulus at other pressures. 7.1 Determine the density ISO 3838 or ISO 12185.standards. Access the full version online.© ISO ISO 6073:1997(E) Symbol q Designation Isentropic secant bulk modulus Isothermal secant bulk modulus Isothermal secant bulk modulus at atmospheric pressure Specific heat capacity at constant pressure Adiabatic coefficient of compressibility Isothermal coefficient of compressibility Isentropic tangent bulk modulus Isothermal tangent bulk modulus Isothermal tangent bulk modulus at atmospheric pressure Gauge pressure Atmospheric pressure Entropy Temperature Volume Volume at atmospheric pressure and temperature Temperature r Density at a given pressure kg/m3 r0 Density at atmospheric pressure kg/m3 BS BT BT0 cp kS kT KS KT KT0 p This is a free 5 page sample.1 From figure 1. Read off the appropriate values on the ordinate.2 Determine the density at the required temperature in accordance with ISO 91-1.com. p0 S T V V0 6 Unit MPa MPa MPa J/(kg◊K) MPa-1 MPa-1 MPa MPa MPa kPa or MPa kPa J/K K m3 m3 °C Determinations 6.com. Predictions Isothermal secant bulk modulus 7. 6.isostandards. and move horizontally until this value intersects with the 150 MPa line. 3 www. NOTE — 7 7.2 Transfer the figure obtained in 7.1.1.au Copyright ISO www.1. at 15 °C in accordance with ISO 3675.1 to the ordinate of figure 2. read off the isothermal secant bulk modulus at a reference pressure of 150 MPa.au . IEC.Prediction of the bulk moduli of petroleum fluids used in hydraulic power systems Looking for additional Standards? Visit SAI Global Infostore Subscribe to our Free Newsletters about Australian Standards® in Legislation. ISO. Standards and Manufacturers Materials Infobase Database of Materials. Access the full version online.This is a free preview. CELEX and Court Decisions Need to speak with a Customer Service Representative . Standards and Suppliers Database of European Law. BSI and more Do you need to Manage Standards Collections Online? Learn about LexConnect. Purchase the entire publication at the link below: This is a free 5 page sample. ISO 6073:1997 Petroleum products . Standards referenced in Australian legislation Do you want to know when a Standard has changed? Want to become an SAI Global Standards Sales Affiliate? Learn about other SAI Global Services: LOGICOM Military Parts and Supplier Database Metals Infobase Database of Metal Grades. All Jurisdictions.Contact Us .