ASTM D1267-12
(Test Method)Standard Test Method for Gage Vapor Pressure of Liquefied Petroleum (LP) Gases (LP-Gas Method)
Standard Test Method for Gage Vapor Pressure of Liquefied Petroleum (LP) Gases (LP-Gas Method)
SIGNIFICANCE AND USE
5.1 Information on the vapor pressures of liquefied petroleum gas products under temperature conditions from 37.8 to 70°C (100 to 158°F) is pertinent to selection of properly designed storage vessels, shipping containers, and customer utilization equipment to ensure safe handling of these products.
5.2 Determination of the vapor pressure of liquefied petroleum gas is important for safety reasons to ensure that the maximum operating design pressures of storage, handling, and fuel systems will not be exceeded under normal operating temperature conditions.
5.3 For liquefied petroleum gases, vapor pressure is an indirect measure of the most extreme low temperature conditions 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.
SCOPE
1.1 This test method covers the determination of the gage vapor pressures of liquefied petroleum gas products (Warning—Flammable gas. Harmful when inhaled.) at temperatures of 37.8°C (100°F) up to and including a test temperature of 70°C (158°F).
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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 warning statements, see 1.1 and Annex A2.
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Designation:D1267 −12
Standard Test Method for
Gage Vapor Pressure of Liquefied Petroleum (LP) Gases
1
(LP-Gas Method)
This standard is issued under the fixed designation D1267; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 4. Summary of Test Method
1.1 This test method covers the determination of the gage 4.1 The test apparatus, consisting of two interconnected
vapor pressures of liquefied petroleum gas products chambersandequippedwithasuitablepressuregage,ispurged
(Warning—Flammable gas. Harmful when inhaled.) at tem- with a portion of the sample which is then discarded. The
peratures of 37.8°C (100°F) up to and including a test apparatus is then filled completely with the portion of the
temperature of 70°C (158°F). sample to be tested. Thirty-three and one-third to forty volume
percent of the sample content of the apparatus is immediately
1.2 The values stated in SI units are to be regarded as the
withdrawn to provide adequate free space for product expan-
standard. The values given in parentheses are for information
sion. The apparatus is then immersed in a water bath main-
only.
tained at the standard test temperature of 37.8°C (100°F) or,
1.3 This standard does not purport to address all of the
optionally, at some higher test temperature up to and including
safety concerns, if any, associated with its use. It is the
a test temperature of 70°C (158°F).
responsibility of the user of this standard to establish appro-
4.2 The observed gage pressure at equilibrium, after cor-
priate safety and health practices and determine the applica-
recting for gage error and correcting to a standard barometric
bility of regulatory limitations prior to use. For specific
pressure, is reported as the LPG Vapor Pressure at the selected
warning statements, see 1.1 and Annex A2.
test temperature.
2. Referenced Documents
5. Significance and Use
2
2.1 ASTM Standards:
5.1 Information on the vapor pressures of liquefied petro-
D323 TestMethodforVaporPressureofPetroleumProducts
leum gas products under temperature conditions from 37.8 to
(Reid Method)
70°C (100 to 158°F) is pertinent to selection of properly
D1265 Practice for Sampling Liquefied Petroleum (LP)
designed storage vessels, shipping containers, and customer
Gases, Manual Method
utilizationequipmenttoensuresafehandlingoftheseproducts.
3. Terminology
5.2 Determination of the vapor pressure of liquefied petro-
3.1 Definitions: leum gas is important for safety reasons to ensure that the
3.1.1 liquefied petroleum gases, n—narrow boiling range maximum operating design pressures of storage, handling, and
hydrocarbon mixtures consisting mainly of propane or fuel systems will not be exceeded under normal operating
propylene, or both, and butanes or butylenes, or both, plus temperature conditions.
limited amounts of other hydrocarbons and naturally occurring
5.3 For liquefied petroleum gases, vapor pressure is an
non-hydrocarbons.
indirect measure of the most extreme low temperature condi-
3.1.2 vapor pressure, n—the pressure exerted by the vapor
tionsunderwhichinitialvaporizationcanbeexpectedtooccur.
of a liquid when in equilibrium with the liquid.
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 D02 on
6. Apparatus
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.H0 on Liquefied Petroleum Gas.
6.1 Vapor Pressure Apparatus, constructed as illustrated in
Current edition approved Nov. 1, 2012. Published February 2013. Originally
Fig. A1.1, and the various items of auxiliary equipment, are
approved in 1953. Last previous edition approved in 2007 as D1267–02(2007).
completely described in Annex A1.
DOI: 10.1520/D1267-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.2 The vapor chamber of Test Method D323, can be
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
interchangeable with the upper chamber of this method.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Similarly, the liquid chamber (two-opening type) of Test
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D1267−12
Method D323 is interchangeable with the B, 20 % lower as the pressure of the sample source, momentarily open the
chamber A1.1.4 of this metho
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D1267 − 02 (Reapproved 2007) D1267 − 12
Standard Test Method for
Gage Vapor Pressure of Liquefied Petroleum (LP) Gases
1
(LP-Gas Method)
This standard is issued under the fixed designation D1267; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope Scope*
1.1 This test method covers the determination of the gage vapor pressures of liquefied petroleum gas products (Warning—
Flammable gas. Harmful when inhaled.) at temperatures of 37.8°C (100°F) up to and including a test temperature of 70°C (158°F).
1.2 The values stated in acceptable metric SI units are to be regarded as the standard. The values given in parentheses are for
information only.
1.3 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 hazardwarning statements, see 3.2.11.1 and Annex A2.
2. Referenced Documents
2
2.1 ASTM Standards:
D323 Test Method for Vapor Pressure of Petroleum Products (Reid Method)
D1265 Practice for Sampling Liquefied Petroleum (LP) Gases, Manual Method
E1 Specification for ASTM Liquid-in-Glass Thermometers
2.2 Institute of Petroleum Standard:
3
IP 181 Sampling Petroleum Gases
3. Terminology
3.1 Definitions:
3.1.1 vapor pressure—the pressure exerted by the vapor of a liquid when in equilibrium with the liquid.
3.1 Definitions of Terms Specific to This Standard:Definitions:
3.1.1 liquefied petroleum gases—gases, n—narrow boiling range hydrocarbon mixtures consisting chieflymainly of propane or
propylene, or both, (andWarning—Extremely flammable. Harmful when inhaled.) butanes and butanes or butylenes, or both, in
which the content of hydrocarbon compounds of higher boiling point than 0°C (32°F) is less than 5 % by liquid volume, and whose
gage vapor pressure at 37.8°C (100°F) is not greater than approximately 1550 kPa (225 psi).plus limited amounts of other
hydrocarbons and naturally occurring non-hydrocarbons.
3.1.2 vapor pressure, n—the pressure exerted by the vapor of a liquid when in equilibrium with the liquid.
4. Summary of Test Method
4.1 The test apparatus, consisting of two interconnected chambers and equipped with a suitable pressure gage, is purged with
a portion of the sample which is then discarded. The apparatus is then filled completely with the portion of the sample to be tested.
Thirty-three and one-third to forty volume percent of the sample content of the apparatus is immediately withdrawn to provide
adequate free space for product expansion. The apparatus is then immersed in a water bath maintained at the standard test
temperature of 37.8°C (100°F) or, optionally, at some higher test temperature up to and including a test temperature of 70°C
(158°F).
1
This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.H0 on
Liquefied Petroleum Gas.
Current edition approved May 1, 2007Nov. 1, 2012. Published June 2007February 2013. Originally approved in 1953. Last previous edition approved in 20022007 as
D1267D1267–02(2007).–02. DOI: 10.1520/D1267-02R07. 10.1520/D1267-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D1267 − 12
4.2 The observed gage pressure at equilibrium, after correcting for gage error and correcting to a standard barometric pressure,
is reported as the LPG Vapor Pressure at the selected test temperature.
5. Significance and Use
5.1 Information on the vapor pressures of liquefied petroleum gas products under temperature conditions from 37.8 to 70°C (100
to 158°F) is pertinent to selection of properly designed storage vessels, shipping containers, and customer utilization equipment
to ensure safe handling of these products.
5.2 Determination of
...
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