ASTM G125-00(2015)
Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants

Standard No.

ASTM G125-00(2015)

Release Date

2000

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM G125-00(2023)

Latest

ASTM G125-00(2023)

Scope

5.1 This test method provides for measuring of the minimum conditions of a range of parameters (concentration of oxidant in a flowing mixture of oxidant and diluent, pressure, temperature) that will just support sustained propagation of combustion. For materials that exhibit flaming combustion, this is a flammability limit similar to the lower flammability limit, upper flammability limit, and minimum oxidant for combustion of gases (1).4 However, unlike flammability limits for gases, in two-phase systems, the concept of upper and lower flame limits is not meaningful. However, limits can typically be determined for variations in other parameters such as the minimum oxidant for combustion (the oxidant index), the pressure limit, the temperature limit, and others. Measurement and use of these data are analogous to the measurement and use of the corresponding data for gaseous systems. That is, the limits apply to systems likely to experience complete propagations (equilibrium combustion). Successful ignition and combustion below the measured limits at other conditions or of a transient nature are not precluded below the threshold. Flammability limits measured at one set of conditions are not necessarily the lowest thresholds at which combustion can occur. Therefore direct correlation of these data with the burning characteristics under actual use conditions is not implied.

1.1 This test method covers a procedure for measuring the threshold-limit conditions to allow equilibrium of combustion of materials in various oxidant gases under specific test conditions of pressure, temperature, flow condition, fire-propagation directions, and various other geometrical features of common systems.

1.2 This test method is patterned after Test Method D2863-95 and incorporates its procedure for measuring the limit as a function of oxidant concentration for the most commonly used test conditions. Sections 8, 9, 10, 11, 13, and for the basic oxidant limit (oxygen index) procedure are quoted directly from Test Method D2863-95. Oxygen index data reported in accordance with Test Method D2863-95 are acceptable substitutes for data collected with this standard under similar conditions.

1.3 This test method has been found applicable to testing and ranking various forms of materials. It has also found limited usefulness for surmising the prospect that materials will prove “oxygen compatible” in actual systems. However, its results do not necessarily apply to any condition that does not faithfully reproduce the conditions during test. The fire limit is a measurement of a behavioral property and not a physical property. Uses of these data are addressed in Guides G63 and G94.

Note 1: Although this test method has been found applicable for testing a range of materials in a range of oxidants with a range of diluents......

ASTM G125-00(2015) Referenced Document

• ASTM D1071 Standard Test Methods for Volumetric Measurement of Gaseous Fuel Samples
• ASTM D2444 Standard Test Method for Determination of the Impact Resistance of Thermoplastic Pipe and Fittings by Means of a Tup (Falling Weight)
• ASTM D2863 Standard Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-like Combustion of Plastics (Oxygen Index)
• ASTM D2863-95 Standard Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-like Combustion of Plastics (Oxygen Index)
• ASTM D618 Standard Practice for Conditioning Plastics for Testing
• ASTM G124 Standard Test Method for Determining the Combustion Behavior of Metallic Materials in Oxygen-Enriched Atmospheres
• ASTM G128 Standard Guide for Control of Hazards and Risks in Oxygen Enriched Systems
• ASTM G63 Standard Guide for Evaluating Nonmetallic Materials for Oxygen Service
• ASTM G94 Standard Guide for Evaluating Metals for Oxygen Service
• ISO 4589-2 Plastics - Determination of burning behaviour by oxygen index - Part 2: Ambient-temperature test

ASTM G125-00(2015) history

• 2023 ASTM G125-00(2023) Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants
• 2000 ASTM G125-00(2015) Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants
• 2000 ASTM G125-00(2008) Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants
• 2000 ASTM G125-00 Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants
• 1995 ASTM G125-95e1 Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants