ASTM-D6897 2003

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D6897-03a Standard Test Method for Vapor Pressure of Liquefied Petroleum Gases (LPG) (Expansion Method)

Published By	Publication Date	Number of Pages
ASTM	2003	5

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Categories: 75.160.30 - Gaseous fuels, ASTM

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Description

ASTM D6897-03a

Historical Standard: Standard Test Method for Vapor Pressure of Liquefied Petroleum Gases (LPG) (Expansion Method)

ASTM D6897

Scope

1.1 This test method covers the use of automatic vapor pressure instruments to determine the vapor pressure of liquefied petroleum gas products at a temperature of 37.8°C, vapor to liquid ratio of 0.5:1, and pressures from 200 to 1550 kPa on a sample volume of 3.33 mL.

1.2 This test method is applicable to the determination of vapor pressures of liquefied petroleum gas products at temperatures from 37.8 to 70°C, vapor to liquid ratios of 0.1:1 to 4:1, and pressures up to 3500 kPa; however, the precision of the test method (see Section 15) has only been determined for a vapor to liquid ratio of 0.5:1, at a temperature of 37.8°C, and a pressure range from 300 to 1500 kPa.

Note 1—This test method is not intended to determine the true vapor pressure of LPG samples, but rather determine and report the vapor pressure of LPG at the 37.8°C temperature and 0.5:1 vapor to liquid ratio as the Test Method D 1267 method.

Note 2—This test method is not a true vapor pressure method and will not measure the full contribution from any dissolved gases such as nitrogen or helium if they are present. The contribution of light gases to the measured vapor pressure is highly dependent on the test temperature, type of gas, and V/L ratio of the test. A task group has been formed to determine or quantify the effect that the contribution of light gases have on the measured vapor pressure of LPG sample types as a function of the test temperature, type of gas, and V/L ratio of the test.

1.3 The values stated in SI units are to be regarded as standard.

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. For specific hazard statements, see Appendix X2.

Keywords

expansion method; liquefied petroleum gas; vapor pressure

ICS Code

ICS Number Code 75.160.30 (Gaseous fuels)

DOI: 10.1520/D6897-03A

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Summary of Test Method Significance and Use Apparatus Reagents and Materials
3	Sampling and Sample Introduction Preparation of Apparatus Calibration Quality Control Checks
4	Procedure Calculation Report Precision and Bias Keywords
5	X1. ADDITIONAL CALIBRATION EQUIPMENT FOR PRESSURE TRANSDUCER X1.1 X2. WARNING STATEMENTS X2.1 Propane/Butane, or Mixture of Both

Additional information

Standard Title	D6897-03a Standard Test Method for Vapor Pressure of Liquefied Petroleum Gases (LPG) (Expansion Method)
Published Code	ASTM
Publication Date	2003
Pages Count	5
ICS Codes	75.160.30 - Gaseous fuels