Practices for Sampling Petroleum Products

In preparing to standard sampling systems the following specifications were consulted:

a) International Organization for Standardization

ISO 9162-1989, Petroleum products - Fuels (Class F);

b) American Society for Testing and Materials

ASTM D 1835-05, Standard specification for liquefied petroleum (LP) gases; and

c) Gas Processors Association

GPA 2140-91, Standard method for test for LPG - Specifications for liquefied petroleum gases

and test methods, USA.


2.1 ASTM International

ASTM D 1265-05 Standard practice for sampling liquefied petroleum LP gases (manual method).

ASTM D 1267-02 (2007) Standard test method for vapour pressure liquefied petroleum gases.

ASTM D 1835-05 Standard specification for liquefied petroleum (LP) gases.

ASTM D 1837-02a (2007) Standard test method for volatility of liquefied petroleum gases.

ASTM D 1838-07 Standard test method for copper strip corrosion by liquefied petroleum gases.

ASTM D 2158-05 Standard test method for residues in liquefied petroleum gases.

ASTM D 2597-94 (2004) Standard test method for analysis of demethanized hydrocarbon liquid

mixtures containing nitrogen and carbon dioxide by gas chromatography.

ASTM D 2598-02 (2007) Standard practice method for calculation or certain physical properties of

liquefied petroleum gases from compositional analysis.

ASTM D 2713-91 (2001) Standard test method for dryness of propane (Valve freeze method).

ASTM D 3120-06 e1 Standard test method for trace quantities of sulphur in light liquid petroleum

hydrocarbons by oxidative microcoulometry.

ASTM D 3246-05 Standard test method for sulphur in petroleum gas by oxidative microcoulometry.

ASTM D 3700-07 Standard practice for obtaining LPG samples using a floating piston cylinder.

ASTM D 5305-97 Standard test method for determination of ethyl mercaptan in LP-gas vapour.

ASTM D 5453-06 Standard test method for determination of total sulphur in light hydrocarbons, spark

ignition engine fuel, diesel engine fuel and engine oil by ultraviolet fluorescence.


2.2 International Organization for Standardization

ISO 3993-1984 Liquefied petroleum gas and light hydrocarbons - Determination of density or relative

density - Pressure hydrometer method.

ISO 4256-1996 Liquefied petroleum gases - Determination of vapour pressure - LPG method.

ISO 4257-2001 Liquefied petroleum gases - Method of sampling.

ISO 4267-2: 1988 Petroleum and liquefied petroleum products - Calculation of oil quantities - Part 2:

Dynamic measurement.

ISO 6251-1996 Liquefied petroleum gases - Corrosiveness to copper - Copper strip test.

ISO 7941-1988 Commercial propane and butane - Analysis by gas chromatography.

ISO 8819-1993 Liquefied petroleum gases - Detection of hydrogen sulphide - Lead acetate method.

ISO 9162-1989 Petroleum products - Fuels (class F) - Liquefied petroleum gases – Specifications.



3 Terms and definitions

For the purposes of this national standard, the following terms and definitions shall apply.

3.1 commercial means used for domestic or industrial purposes.

3.2 commercial butane means a hydrocarbon product for use where low volatility is required.

3.3 commercial propane/butane mixtures mean mixtures of propane and butane for use where

intermediate volatility is required.

3.4 commercial propane means a hydrocarbon product for use where high volatility is required.

NOTE Commercial propane is suitable for certain low severity internal combustion engine applications.

3.5 LPG means liquid petroleum gases consisting of commercial butane, commercial propane,

commercial butane-propane mixtures and special duty propane blends.

3.6 residual matter means a measure of the concentration of soluble hydrocarbon materials

present in the product which are substantially less volatile than the liquefied petroleum gas product

being sampled.

3.7 special duty propane means a high quality product composed primarily of propane, which

exhibits superior anti-knock characteristics when used in an internal combustion engine.

3.8 vapour pressure means an indirect measure of the most extreme low temperature conditions

under which initial vaporization can be expected to take place.



To ensure the integrity and reliability of test results proper sampling techniques are important.

Samples shall be drawn in accordance with ASTM D 1265, ASTM D 3700 or ISO 4257. Where there

is a dispute over sampling integrity between ASTM D1265 and ASTM D 3700 requirements, ISO 4257


shall be used as the referee sampling procedure.