ASTM D1267-95

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: D 1267 – 95 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Gage Vapor Pressure of Liquefied Petroleum (LP) Gases
1
(LP-Gas Method)
This standard is issued under the fixed designation D 1267; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope volume, and whose gage vapor pressure at 37.8°C (100°F) is
not greater than approximately 1550 kPa (225 psi).
1.1 This test method covers the determination of the gage
vapor pressures of liquefied petroleum gas products at tem-
NOTE 1—Warning: Extremely flammable. Harmful when inhaled.
peratures of 37.8°C (100°F) up to and including a test
4. Summary of Test Method
temperature of 70°C (158°F).
1.2 This standard does not purport to address all of the
4.1 The test apparatus, consisting of two interconnected
safety concerns, if any, associated with its use. It is the
chambers and equipped with a suitable pressure gage, is purged
responsibility of the user of this standard to establish appro-
with a portion of the sample which is then discarded. The
priate safety and health practices and determine the applica-
apparatus is then filled completely with the portion of the
bility of regulatory limitations prior to use. For specific hazard
sample to be tested. Thirty-three and one-third to forty volume
statements, see Note 2 and Annex A2.
percent of the sample content of the apparatus is immediately
1.3 The values stated in acceptable metric units are to be
withdrawn to provide adequate free space for product expan-
regarded as the standard. The values in parentheses are for
sion. The apparatus is then immersed in a water bath main-
information only.
tained at the standard test temperature of 37.8°C (100°F) or,
optionally, at some higher test temperature up to and including
2. Referenced Documents
a test temperature of 70°C (158°F).
2.1 ASTM Standards:
4.2 The observed gage pressure at equilibrium, after cor-
D 323 Test Method for Vapor Pressure of Petroleum Prod- recting for gage error and correcting to a standard barometric
2
ucts (Reid Method)
pressure, is reported as the LPG Vapor Pressure at the selected
D 1265 Practice for Sampling Liquefied Petroleum (LP) test temperature.
2
Gases (Manual Method)
3
5. Significance and Use
E 1 Specification for ASTM Thermometers
2.2 Institute of Petroleum Standard:
5.1 Information on the vapor pressures of liquefied petro-
4
IP 181 Sampling Petroleum Gases
leum gas products under temperature conditions from 37.8 to
70°C (100 to 158°F) is pertinent to selection of properly
3. Terminology
designed storage vessels, shipping containers, and customer
3.1 Definitions:
utilization equipment to ensure safe handling of these products.
3.1.1 vapor pressure—the pressure exerted by the vapor of
5.2 Determination of the vapor pressure of liquefied petro-
a liquid when in equilibrium with the liquid.
leum gas is important for safety reasons to ensure that the
3.2 Definitions of Terms Specific to This Standard:
maximum operating design pressures of storage, handling, and
3.2.1 liquefied petroleum gases—narrow boiling range hy-
fuel systems will not be exceeded under normal operating
drocarbon mixtures consisting chiefly of propane or propylene,
temperature conditions.
or both, (Warning—see Note 1) butanes and butylenes, or both,
5.3 For liquefied petroleum gases, vapor pressure is an
in which the content of hydrocarbon compounds of higher
indirect measure of the most extreme low temperature condi-
boiling point than 0°C (32°F) is less than 5 % by liquid
tions under which initial vaporization can be expected to occur.
It can be considered a semi-quantitative measure of the amount
of the most volatile material present in the product.
1
This test method is under the jurisdiction of ASTM Committee D-2 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
6. Apparatus
D02.H on Liquefied Petroleum Gas.
6.1 Vapor Pressure Apparatus, constructed as illustrated in
Current edition approved April 15, 1995. Published June 1995. Originally
published as D 1267 – 53 T. Last previous edition D 1267 – 89.
Fig. A1.1, and the various items of auxiliary equipment, are
2
Annual Book of ASTM Standards, Vol 05.01.
completely described in Annex A1.
3
Annual Book of ASTM Standards, Vol 14.03.
4
6.2 The air chamber of Test Method D 323, may be inter-
Available from Applied Science Publishers, Ripple Rd., Barking, Essex,
England changeable with the upper chamber of this meth
...