Crude Petroleum And Liquid Or Solid Petroleum Products Determination Of Density Or Relative Density Capillary Stoppered Pyknometer And Graduated Bicapillary Pyknometer Methods Amendment 1 Iso 38382004 Dam 12023

Author : International Organization for Standardization
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (14 download)

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Download or read book Crude Petroleum and Liquid Petroleum Products written by International Organization for Standardization and published by . This book was released on 1998 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: This International Standard specifies a method for the laboratory determination, using a glass hydrometer, of the density at 15°C of crude petroleum, liquid petroleum products, and mixtures of petroleum and non-petroleum products normally handled as liquids and having a Reid vapour pressure (RVP) of 100 kPa or less. This International Standard is suitable for determining the density of mobile transparent liquids. It can also be used for viscous liquids by carrying out the determinations at temperatures above ambient using a suitable liquid bath for temperature control. It can also be used for opaque liquids by reading the hydrometer scale where the top of the meniscus meets the stem of the hydrometer and applying a correction from table 1 (see 11.2). Since hydrometers are calibrated to read correctly at the specified temperature, scale readings made at other temperatures are only hydrometer readings and not values of density at these other temperatures. The accuracy of the density, determined by the procedures given in this International Standard, for volatile and/or waxy crude oils containing free and/or suspended water and sediments can be less than inferred from the precision data quoted in clause 13. This is due to the possible loss of light components during sample mixing. However, sample mixing is necessary to ensure that the test portion transferred to the hydrometer cylinder is as representative as possible of the bulk sample. Techniques are given in clause 7 which are designed to minimize such loss of light component. Values of density at 15 degrees C can be converted using standard measurement tables to equivalent values of API gravity or relative density so that measurements may be made in the units of local convenience.