ASTM G124-10
(Test Method)Standard Test Method for Determining the Combustion Behavior of Metallic Materials in Oxygen-Enriched Atmospheres
Standard Test Method for Determining the Combustion Behavior of Metallic Materials in Oxygen-Enriched Atmospheres
SIGNIFICANCE AND USE
This test method will allow comparisons of the burning characteristics of various metallic materials. The burning characteristics that can be evaluated include (1) burn and no-burn pressure, (2) burn and no-burn temperature, (3) regression rate of the melting interface, and (4) visual evaluation of the burning process of the test sample.
SCOPE
1.1 This test method covers test apparatus and techniques to determine the minimum test gas pressure and sample temperature that supports self-sustained burning and the regression rate of the melting surface of a standardized sample of a metallic material that has been ignited using a promoter.
1.2 The data obtained from this test method are dependent on the precise test sample configuration and provide a basis for comparing the burning characteristics of metallic materials. No criteria are implied for relating these data for the suitability of a material's use in any actual system.
1.3 Requirements for apparatus suitable for this test method are given, as well as an example. The example is not required to be used.
1.4 This test method is for gaseous oxygen or any mixture of oxygen with inert diluents that will support burning, at any pressure or temperature within the capabilities of the apparatus used.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 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.
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Designation: G124 − 10
Standard Test Method for
Determining the Combustion Behavior of Metallic Materials
1
in Oxygen-Enriched Atmospheres
This standard is issued under the fixed designation G124; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope G88Guide for Designing Systems for Oxygen Service
G93Practice for Cleaning Methods and Cleanliness Levels
1.1 Thistestmethodcoverstestapparatusandtechniquesto
for Material and Equipment Used in Oxygen-Enriched
determine the minimum test gas pressure and sample tempera-
Environments
turethatsupportsself-sustainedburningandtheregressionrate
G94Guide for Evaluating Metals for Oxygen Service
of the melting surface of a standardized sample of a metallic
material that has been ignited using a promoter.
3. Terminology
1.2 The data obtained from this test method are dependent
3.1 Definitions:
ontheprecisetestsampleconfigurationandprovideabasisfor
3.1.1 burn length, n—the burn length is the length of the
comparingtheburningcharacteristicsofmetallicmaterials.No
sample that has been consumed by combustion.
criteria are implied for relating these data for the suitability of
3.1.1.1 Discussion—The burn length is determined by sub-
a material’s use in any actual system.
tracting the post-test sample length from the pretest sample
1.3 Requirements for apparatus suitable for this test method
length (which does not include the promoter length or region
are given, as well as an example. The example is not required
used by the test sample support.)
to be used.
3.1.2 flammable material, n—a material is defined in this
1.4 This test method is for gaseous oxygen or any mixture
standard as flammable if a standard rod sample burns more
of oxygen with inert diluents that will support burning, at any
3
than 3 cm (1.2 in.) above the promoter (1, 2).
pressureortemperaturewithinthecapabilitiesoftheapparatus
3.1.3 highest no-burn pressure, n—the maximum gas pres-
used.
sure (at a specified oxygen concentration and fixed sample
1.5 The values stated in SI units are to be regarded as the
temperature)atwhichamaterialdoesnotburnmorethan3cm
standard. The values given in parentheses are for information
(1.2 in.) above the promoter in a minimum of five tests.
only.
3.1.4 highest no-burn temperature, n—the maximum
1.6 This standard does not purport to address all of the
sample temperature (at a specified oxygen concentration and
safety concerns, if any, associated with its use. It is the
pressure) at which a material does not burn more than 3 cm
responsibility of the user of this standard to establish appro-
(1.2 in.) above the promoter in a minimum of 5 tests.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 3.1.5 igniter, n—a material used to ignite the promoter that
canburnunderanelectricalinfluence,suchasasmall-diameter
2. Referenced Documents
wire.
2
2.1 ASTM Standards:
3.1.6 lowest burn pressure, n—the minimum gas pressure
G63Guide for Evaluating Nonmetallic Materials for Oxy-
(ataspecifiedoxygenconcentrationandfixedsampletempera-
gen Service
ture) at which a material burns more than 3 cm (1.2 in.) above
the promoter for one or more tests specimens.
1
3.1.7 lowest burn temperature, n—the minimum sample
This test method is under the jurisdiction of ASTM Committee G04 on
Compatibility and Sensitivity of Materials in Oxygen EnrichedAtmospheres and is
temperature (at a specified oxygen concentration and pressure)
the direct responsibility of Subcommittee G04.01 on Test Methods.
at which a material burns more than 3 cm (1.2 in.) above the
Current edition approved Nov. 1, 2010. Published November 2010. Originally
promoter for one or more tests specimens.
approved in 1994. Last previous edition approved in 2003 as G124–95(2003).
DOI: 10.1520/G0124-10.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on The boldface numbers in parentheses refer to a list of references at the end of
the ASTM website. this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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G124 − 10
3.1.8 promoter, n—anoptionalmaterialthatcanaddsupple- Athorough discussion of the burn probabilities and associated
mentalheatandincreasethetemperaturetostartburningofthe confidence levels is given in Ref (3).
NOTE 2—Increasing the number of samples will always give a higher
meta
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:G124–95(Reapproved2003) Designation:G124–10
Standard Test Method for
Determining the Combustion Behavior of Metallic Materials
1
in Oxygen-Enriched Atmospheres
This standard is issued under the fixed designation G124; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 Thistestmethodcoversatestapparatusandtechniquestodeterminetheminimumtestgaspressureandsampletemperature
thatsupportsself-sustainedcombustion(thethresholdpressure)burningandtheaverageregressionrate(apparentburnrate)ofthe
melting surface of a standardized sample of a metallic material that has been ignited using a strong promoter.
1.2 The data obtained from this test method are dependent on the precise test sample configuration and provide a basis for
comparingthecombustionbehaviorburningcharacteristicsofmetallicmaterials.Nocriteriaareimpliedforrelatingthesedatatofor
thesuitabilityofamaterial’suseinanyactualsystem.TheapplicationofdataobtainedfromthistestmethodisdiscussedinGuides
G88 and G94.
1.3 Requirementsforanapparatussuitableforthistestmethodaregiven,aswellasanexampleofsuchanapparatus.example.
The example, however, example is not required to be used.
1.4 This test method is for gaseous oxygen or any mixture of oxygen with inert diluents that will support combustion,burning,
at any pressure or temperature within the capabilities of the apparatus used.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 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. Specific hazards statements are given in Section 9.
2. Referenced Documents
2
2.1 ASTM Standards:
G63 Guide for Evaluating Nonmetallic Materials for Oxygen Service
G88 Guide for Designing Systems for Oxygen Service
G93 Practice for Cleaning Methods and Cleanliness Levels for Material and Equipment Used in Oxygen-Enriched
Environments
G94 Guide for Evaluating Metals for Oxygen Service
2.2 Federal Specification:
BB-0-925 Oxygen, Technical, Gas and Liquid
2.3 Military Standard:
3
MIL-0-27210E Amendment 1—Oxygen, Aviator’s Breathing, Liquid and Gas
3. Terminology
3.1Definitions of Terms Specific to This Standard:
3.1 Definitions:
3.1.1 average regression rate (apparent burn rate)—theaveragerateatwhichtheburning/solid-metalinterfaceadvancesalong
the test sample length. burn length, n—the burn length is the length of the sample that has been consumed by combustion.
3.1.1.1 Discussion—The burn length is determined by subtracting the post-test sample length from the pretest sample length
(which does not include the promoter length or region used by the test sample support.)
3.1.2 igniter—a material to ignite the promoter that can burn under an electrical influence, such as a small-diameter wire.
1
This test method is under the jurisdiction of ASTM Committee G04 on Compatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres and is the direct
responsibility of Subcommittee G04.01 on Test Methods.
Current edition approved March 10, 2003. Published March 2003. Originally approved in 1994. Last previous edition approved in 1995 as G124–95. DOI:
10.1520/G0124-95R03.
Current edition approved Nov. 1, 2010. Published November 2010. Originally approved in 1994. Last previous edition approved in 2003 as G124–95(2003). DOI:
10.1520/G0124-10.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
G124–10
flammablematerial, n—amaterialisdefinedinthisstandardasflammableifastandardrodsampleburnsmorethan3cm(1.2in.)
3
above the promoter (1, 2).
3.1.3 promoter—a material that can add supplemental heat and increase the temperature to start combustion of the material
being tested. highest no-burn pressure, n—the maximum gas pressure (at a specified oxygen concentration a
...
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