Work Item
ASTM WK75644

New Test Method for Determination of Water Content of Liquefied Petroleum Gases (LPG) Using an Electronic Moisture Analyzer

1. Scope

The scope of the Committee shall be the promotion of knowledge and the promulgation of standard specifications, classifications, test methods, practices, guides, and terminology in the following technical fields:
Liquid fuels derived from: petroleum or the liquefaction of coal, shale, oil sands, or other naturally occurring materials; liquefied petroleum gas (LPG) and other compressed liquefied fuels; liquid fuels derived from biological materials ('biofuels'); synthesized liquid fuels (also known as renewable or alternative fuels) and oxygenates as fuels or components thereof. Such liquid fuels encompass fuels used for aviation, automotive, burner, diesel, gas turbine, and marine services.
Lubricants derived in whole or in part from petroleum and non-petroleum sources, including synthetics (such as ester lubricating oils), biological, or naturally occurring (mined) materials;
Hydraulic fluids whether derived in whole or in part from petroleum or from other sources;
Liquid hydrocarbons (including liquefied petroleum gas (LPG), and mixtures of hydrocarbons, for chemical and special uses, and fuel products derived therefrom;
Petroleum coke, industrial carbons, and industrial pitches derived in whole or in part from petroleum liquids;
Petrolatum and petroleum waxes;
Additives and other substances which affect the product characteristics of fuels, lubricants, and other products within the scope of the Committee.
Also included within the scope of the Committee shall be the promotion of knowledge and the promulgation of standards on the environmental persistence (biodegradation), ecotoxicity, and bioaccumulation of the products indicated in Section 2.1.
Specifically excluded from the scope of the Committee are standards related to the following technical areas:
Gaseous fuels, including natural gas (including LNG and CNG), hydrogen and manufactured gases such as water gas;
Aromatic and naphthenic hydrocarbons containing six or more carbon atoms, and used in chemical manufacture;
Road and paving materials, bituminous waterproofing and roofing materials;
Paint thinners, solvents;
Electrical insulating materials.
The work of this Committee shall be coordinated with other ASTM International committees and with organizations having mutual interests.


benchtop analyzer; valve freeze


The moisture content of some LPG products can be critical to their use in cold climates. Special- Duty Propane and Commercial Propane require moisture levels below their saturation level at operating temperatures and pressures to meet specifications. In order to prevent ice and/or hydrate formation, the degree of water saturation must be low enough to prevent the formation of free water in storage tanks and/or regulators during normal service and even at very low ambient temperatures to which they may be exposed. The formation of ice and/or hydrates can lead to the blockage of vapor or liquid fuel lines, and disrupt the operation of pumps, meters, filters, valves, regulators and safety shut-off valves. Occasional process failures or contamination during transport can cause water contamination of LPG. The dryness of propane can be evaluated using D2713, Standard Test Method for Dryness of Propane (Valve Freeze Method). However, this test method is a performance test on a spot sample, that may be fooled by the presence of methanol added as an anti-icing additive. Method D2713 does not provide a quantitative measurement of water content. Method D2713 has environmental concerns due to the amount of propane that is released during the test. This method proposes use of an electronic hygrometer that measures the dew point of a flowing stream of LPG, and calculates the amount of water in a liquid sample based on the composition of the LPG, and its temperature.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: D02.H0

Committee: D02

Staff Manager: Alyson Fick

Work Item Status

Date Initiated: 01-28-2021

Technical Contact: Robert Falkiner

Item: 000