ASTM D1267 Gage Vapor Pressure of Liquefied Petroleum Gases
ASTM D1267 Standard Test Method for Gage Vapor Pressure of Liquefied Petroleum (LP) Gases (LP-Gas Method)
1. Scope
1.1 This test method covers the determination of the gage vapor pressures of liquefied petroleum gas products 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 units are to be regarded as the standard. The values 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 hazard statements, see 3.2.1 and Annex A2.
2. Referenced Documents
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)
E 1 Specification for ASTM Thermometers
2.2 Institute of Petroleum Standard:
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.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 liquefied petroleum gases - narrow boiling range hydrocarbon mixtures consisting chiefly of propane or propylene, or both, (Warning - Extremely flammable. Harmful when inhaled.) butanes and 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).
