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ASTM G125-00

(Test Method)

Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants

Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants

SIGNIFICANCE AND USE
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 flammability9 limit, upper flammability limit, and minimum oxidant for combustion of gases (1). 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.
SCOPE
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 14 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, the accuracy has not been determined for many of these combinations and conditions of specimen geometry, outside those of the basic procedure as applied to plastics.
Note 2--Test Method D2863-95 has been revised and the revised Test Method has been issued as D2863-97. The major changes involve sample dimensions, burning criteria and the method for determining the oxygen index. The aim of the revisions was to alignTest Method D2863 with ISO 4589-2. Six laboratories conducted comparison round robin testing on self-supporting plastics and cellular materials using D2863-95 and D2863-97. The results indicate that there is no difference between the means provided y the two methods at the 95 % confidence level. No comparison tests were conducted on thin films. The majority of ASTM Committee G4 favors maintaining the D2863-95 as the backbone of G125 until comprehensive comparison data become available.
1.4 One very specific set of test conditions for measuring the fire limits of metals in oxygen has been codified in Test Method G124. Test Method G124 measures the minimum pressure limit in oxygen for its own ...

General Information

Status
Historical
Publication Date
09-Nov-2000
ICS
13.220.40 - Ignitability and burning behaviour of materials and products
19.040 - Environmental testing
Technical Committee
G04 - Compatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres
Drafting Committee
G04.01 - Test Methods
Current Stage
Ref Project

Relations

Replaces
ASTM G125-95e1 - Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants
Effective Date
10-Nov-2000
Replaced By
ASTM G125-00(2008) - Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants
Effective Date
01-Apr-2008
Referred By
ASTM G126-16(2023) - Standard Terminology Relating to the Compatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres
Effective Date
10-Nov-2000
Referred By
ASTM G114-21 - Standard Practices for Evaluating the Age Resistance of Polymeric Materials Used in Oxygen Service
Effective Date
10-Nov-2000

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ASTM G125-00 - Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous OxidantsASTM G125-00 - Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants
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ASTM G125-00 - Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:G125–00
Standard Test Method for
Measuring Liquid and Solid Material Fire Limits in Gaseous
1
Oxidants
This standard is issued under the fixed designation G 125; 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 (e) indicates an editorial change since the last revision or reapproval.
4589-2. Six laboratories conducted comparison round robin testing on
1. Scope
self-supporting plastics and cellular materials using D 2863-95 and
1.1 This test method covers a procedure for measuring the
D 2863-97. The results indicate that there is no difference between the
threshold-limit conditions to allow equilibrium of combustion
means provided y the two methods at the 95 % confidence level. No
of materials in various oxidant gases under specific test
comparison tests were conducted on thin films. The majority of ASTM
conditions of pressure, temperature, flow condition, fire- Committee G4 favors maintaining the D 2863-95 as the backbone of
G 125 until comprehensive comparison data become available.
propagation directions, and various other geometrical features
of common systems.
1.4 One very specific set of test conditions for measuring
1.2 This test method is patterned after Test Method
the fire limits of metals in oxygen has been codified in Test
D 2863-95 and incorporates its procedure for measuring the
Method G 124. Test Method G 124 measures the minimum
limit as a function of oxidant concentration for the most
pressure limit in oxygen for its own set of test conditions. Its
commonly used test conditions. Sections 8, 9, 10, 11, 13, and
details are not reproduced in this standard. A substantial
14 for the basic oxidant limit (oxygen index) procedure are
database is available for this procedure, although it is much
quoted directly from Test Method D 2863-95. Oxygen index
smaller than the database for Test Method D 2863-95.
data reported in accordance with Test Method D 2863-95 are
NOTE 3—Warning: During the course of combustion, gases, vapors,
acceptable substitutes for data collected with this standard
aerosols, fumes or any combination of these are evolved which may be
under similar conditions.
hazardous.
1.3 This test method has been found applicable to testing
NOTE 4—Precaution: Adequate precautions should be taken to protect
and ranking various forms of materials. It has also found
the operator.
limitedusefulnessforsurmisingtheprospectthatmaterialswill
1.5 The values stated in SI units are to be regarded as the
prove “oxygen compatible” in actual systems. However, its
standard.
results do not necessarily apply to any condition that does not
1.6 This basic standard should be used to measure and
faithfully reproduce the conditions during test. The fire limit is
describe the properties of materials, products, or assemblies in
a measurement of a behavioral property and not a physical
response to heat and flame under controlled laboratory con-
property. Uses of these data are addressed in Guides G 63 and
ditions and should not be used to directly describe or appraise
G 94.
the fire hazard or fire risk of materials, products or assemblies
under actual fire conditions. However, results of this test may
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,
be used as elements of a fire risk assessment which takes into
the accuracy has not been determined for many of these combinations and
account all of the factors which are pertinent to an assessment
conditions of specimen geometry, outside those of the basic procedure as
of the fire hazard of a particular end use. The standard has
applied to plastics.
more applicability in this regard at predicting the fire behavior
NOTE 2—Test Method D 2863-95 has been revised and the revised Test
of materials and components that are close in size to the test
Method has been issued as D 2863-97.The major changes involve sample
condition, than for systems that are much different (for ex-
dimensions, burning criteria and the method for determining the oxygen
index.The aim of the revisions was to alignTest Method D 2863 with ISO ample: comparing a test rod to a valve seat rather than
comparing a test rod to a house or a particle)
1.7 This standard does not purport to address all of the
1
This test method is under the jurisdiction of ASTM Committee G04 on
safety concerns, if any, associated with its use. It is the
Compatibility and Sensitivity of Materials in Oxygen-EnrichedAtmospheres and is
responsibility of the user of this standard to establish appro-
the direct responsibility of Subcommittee G4.01 on Test Methods. Portions have
been adopted from Test Method D 2863 – 95
...

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1.1 This specification covers UNS N06002, UNS N06030, UNS N06035, UNS N06022, UNS N06200, UNS N10362, UNS N06230, UNS N06600, UNS N06617, UNS N06625, UNS N08020, UNS N08026, UNS N08024, UNS N08120, UNS N08926, UNS N08367, UNS N10242, UNS N10276, UNS N10665, UNS N10675, UNS N12160, UNS R20033, UNS N06059, UNS N06686, UNS N10629, UNS N08031, UNS N06045, UNS N06025, UNS N06699, and UNS R305562 billets and bars for reforging.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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 become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Technical specification
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    English language
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  • Technical specification
    5 pages
    English language
    sale 15% off