ASTM D1657-02

    Standard Test Method for Density or Relative Density of Light Hydrocarbons by Pressure Hydrometer


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    1. Scope

    1.1 This test method covers the determination of the density or relative density of light hydrocarbons including liquefied petroleum gases (LPG) having Reid vapor pressures exceeding 101.325 kPa (14.696 psi).

    1.2 The prescribed apparatus should not be used for materials having vapor pressures higher than 1.4 MPa (200 psi) at the test temperature. This pressure limit is dictated by the type of equipment. Higher pressures may apply to other equipment designs.

    1.3 The values in SI units are to be regarded as the standard. The values in parentheses are for information only. Both SI and customary units have been rounded so that they may not be exactly equivalent.

    1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D1250 Guide for Use of the Petroleum Measurement Tables

    D1265 Practice for Sampling Liquefied Petroleum (LP) Gases, Manual Method

    D1298 Test Method for Density, Relative Density, and API Gravity of Crude Petroleum and Liquid Petroleum Products by Hydrometer Method (API MPMS Chapter 9.1)

    E1 Specification for ASTM Liquid-in-Glass Thermometers

    E100 Specification for ASTM Hydrometers

    API Standards

    MPMS Chapter 11.2.2M

    MPMS Chapter 11.2.4 Temperature Correction for the Volume of NGL and LPG Tables 23E, 24E, 53E, 54E, 59E and 60E (joint standard with GPA TP-27)

    MPMS Chapter 11.5 Density/Weight/Volume Intraconversion

    GPA Standards

    GPA Technical Publication TP-27 Temperature Correction for the Volume of NGL and LPG, Tables 23E, 24E, 53E, 54E, 59E and 60E (joint standard with API MPMS Chapter 11.2.4)


    ICS Code

    ICS Number Code 75.080 (Petroleum products in general)

    UNSPSC Code

    UNSPSC Code


    Referencing This Standard
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    DOI: 10.1520/D1657-02

    Citation Format

    ASTM D1657-02, Standard Test Method for Density or Relative Density of Light Hydrocarbons by Pressure Hydrometer, ASTM International, West Conshohocken, PA, 2002, www.astm.org

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