ASTM D5191-15
Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)

Standard No.

ASTM D5191-15

Release Date

2015

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM D5191-18

Latest

ASTM D5191-22

Scope

5.1 Vapor pressure is a very important physical property of volatile liquids.

5.2 The vapor pressure of gasoline and gasoline-oxygenate blends is regulated by various government agencies.

5.3 Specifications for volatile petroleum products generally include vapor pressure limits to ensure products of suitable volatility performance.

5.4 This test method is more precise than Test Method D4953, uses a small sample size (18201;mL to 10 mL), and requires about 7 min to complete the test.

1.1 This test method covers the use of automated vapor pressure instruments to determine the total vapor pressure exerted in vacuum by air-containing, volatile, liquid petroleum products, including automotive spark-ignition fuels with or without oxygenates (see Note 1). This test method is suitable for testing samples with boiling points above 08201;°C (328201;°F) that exert a vapor pressure between 78201;kPa and 130 kPa (1.08201;psi and 18.68201;psi) at 37.88201;°C (1008201;°F) at a vapor-to-liquid ratio of 4:1. Measurements are made on liquid sample sizes in the range from 18201;mL to 10 mL. No account is made for dissolved water in the sample.

Note 1: An interlaboratory study was conducted in 2008 involving 11 different laboratories submitting 15 data sets and 15 different samples of ethanol-fuel blends containing 25 volume %, 50 volume %, and 75 volume % ethanol. The results indicated that the repeatability limits of these samples are with in the published repeatability of this test method. on this basis, it can be concluded that D5191 is applicable to ethanol-fuel blends such as Ed75 and Ed85 (Specification D5798) and other ethanol-fuel blends with greater than 10 v% ethanol. See ASTM RR: D02–1694 filed with ASTM for supporting data.2

Note 2: Samples can also be tested at other vapor-to-liquid ratios, temperatures, and pressures, but the precision and bias statements need not apply.

Note 3: The interlaboratory studies conducted in 1988, 1991, and 2003 to determine the precision statements in Test Method D5191 did not include any crude oil in the sample sets. Test Method D6377, as well as IP 481, have been shown to be suitable for vapor pressure measurements of crude oils.

1.1.1 Some gasoline-oxygenate blends may show a haze when cooled to 08201;°C to 18201;°C. If a haze is observed in 8.5, it shall be indicated in the reporting of results. The precision and bias statements for hazy samples have not been determined (see Note 15).

ASTM D5191-15 Referenced Document

• ASTM D2892 Standard Test Method for Distillation of Crude Petroleum (15-Theoretical Plate Column)
• ASTM D4057 Standard Practice for Manual Sampling of Petroleum and Petroleum Products
• ASTM D4953 Standard Test Method for Vapor Pressure of Gasoline and Gasoline-Oxygenate Blends (Dry Method)
• ASTM D5798 Standard Specification for Fuel Ethanol (Ed75-Ed85) for Automotive Spark-Ignition Engines
• ASTM D6299 Standard Practice for Applying Statistical Quality Assurance and Control Charting Techniques to Evaluate Analytical Measurement System Performance
• ASTM D6377 Standard Test Method for Determination of Vapor Pressure of Crude Oil: VPCR_x (Expansion Method)
• ASTM D6378 Standard Test Method for Determination of Vapor Pressure (VP_x) of Petroleum Products, Hydrocarbons, and Hydrocarbon-Oxygenate Mixtures (Triple Expansion Method)
• ASTM D7717 Standard Practice for Preparing Volumetric Blends of Denatured Fuel Ethanol and Gasoline Blendstocks for Laboratory Analysis

ASTM D5191-15 history

• 2022 ASTM D5191-22 Standard Test Method for Vapor Pressure of Petroleum Products and Liquid Fuels (Mini Method)
• 2020 ASTM D5191-20 Standard Test Method for Vapor Pressure of Petroleum Products and Liquid Fuels (Mini Method)
• 2019 ASTM D5191-19 Standard Test Method for Vapor Pressure of Petroleum Products and Liquid Fuels (Mini Method)
• 2018 ASTM D5191-18a Standard Test Method for Vapor Pressure of Petroleum Products and Liquid Fuels (Mini Method)
• 2018 ASTM D5191-18 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2015 ASTM D5191-15 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2013 ASTM D5191-13 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2012 ASTM D5191-12 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2010 ASTM D5191-10b Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2010 ASTM D5191-10a Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2010 ASTM D5191-10 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2007 ASTM D5191-07 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2006 ASTM D5191-06e1 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2006 ASTM D5191-06 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2004 ASTM D5191-04a Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2003 ASTM D5191-03 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2002 ASTM D5191-02 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 2001 ASTM D5191-01 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)
• 1999 ASTM D5191-99 Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method)