ASTM G151-19
(Practice)Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
SIGNIFICANCE AND USE
4.1 Significance:
4.1.1 When conducting exposures in devices that use laboratory light sources, it is important to consider how well the accelerated test conditions will reproduce property changes and failure modes associated with end-use environments for the materials being tested. In addition, it is essential to consider the effects of variability in both the accelerated test and outdoor exposures when setting up exposure experiments and when interpreting the results from accelerated exposure tests.
4.1.2 No laboratory exposure test can be specified as a total simulation of actual use conditions in outdoor environments. Results obtained from these laboratory accelerated exposures can be considered as representative of actual use exposures only when the degree of rank correlation has been established for the specific materials being tested and when the type of degradation is the same. The relative durability of materials in actual use conditions can be very different in different locations because of differences in UV radiation, time of wetness, relative humidity, temperature, pollutants, and other factors. Therefore, even if results from a specific exposure test conducted according to this practice are found to be useful for comparing the relative durability of materials exposed in a particular exterior environment, it cannot be assumed that they will be useful for determining relative durability of the same materials for a different environment.
4.1.3 Even though it is very tempting, calculation of an acceleration factor relating x h or megajoules of radiant exposure in a laboratory accelerated test to y months or years of exterior exposure is not recommended. These acceleration factors are not valid for several reasons.
4.1.3.1 Acceleration factors are material dependent and can be significantly different for each material and for different formulations of the same material.
4.1.3.2 Variability in the rate of degradation in both actual use and la...
SCOPE
1.1 This practice covers general procedures to be used when exposing nonmetallic materials in accelerated test devices that use laboratory light sources. Detailed information regarding procedures to be used for specific devices are found in standards describing the particular device being used. For example, detailed information covering exposures in devices that use open flame carbon arc, enclosed carbon arc, xenon arc, and fluorescent UV light source are found in Practices G152, G153, G154, and G155 respectively.
Note 1: Carbon-arc, xenon arc, and fluorescent UV exposures were also described in Practices G23, G26, and G53 which referred to very specific equipment designs. Practices G152, G153, and G154, and G155 are performance based standards that replace Practices G23, G26, and G53.
1.2 This practice also describes general performance requirements for devices used for exposing nonmetallic materials to laboratory light sources. This information is intended primarily for producers of laboratory accelerated exposure devices.
1.3 This practice provides information on the use and interpretation of data from accelerated exposure tests. Specific information about methods for determining the property of a nonmetallic material before and after exposure are found in standards describing the method used to measure each property. Information regarding the reporting of results from exposure testing of plastic materials is described in Practice D5870.
Note 2: Guide G141 provides information for addressing variability in exposure testing of nonmetallic materials. Guide G169 provides information for application of statistics to exposure test results.
Note 3: This standard is technically equivalent to ISO 4892, Part 1.
1.4 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, health, an...
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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.
Designation: G151 − 19
Standard Practice for
Exposing Nonmetallic Materials in Accelerated Test Devices
1
that Use Laboratory Light Sources
This standard is issued under the fixed designation G151; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.1 Thispracticecoversgeneralprocedurestobeusedwhen
1.5 This international standard was developed in accor-
exposing nonmetallic materials in accelerated test devices that
dance with internationally recognized principles on standard-
use laboratory light sources. Detailed information regarding
ization established in the Decision on Principles for the
procedures to be used for specific devices are found in
Development of International Standards, Guides and Recom-
standards describing the particular device being used. For
mendations issued by the World Trade Organization Technical
example, detailed information covering exposures in devices
Barriers to Trade (TBT) Committee.
that use open flame carbon arc, enclosed carbon arc, xenon arc,
and fluorescent UV light source are found in Practices G152,
2. Referenced Documents
G153, G154, and G155 respectively.
2
2.1 ASTM Standards:
NOTE 1—Carbon-arc, xenon arc, and fluorescent UV exposures were
also described in Practices G23, G26, and G53 which referred to very D618 Practice for Conditioning Plastics for Testing
specific equipment designs. Practices G152, G153, and G154, and G155
D3924 Specification for Standard Environment for Condi-
are performance based standards that replace Practices G23, G26, and
tioning and Testing Paint, Varnish, Lacquer, and Related
G53.
3
Materials (Withdrawn 2016)
1.2 This practice also describes general performance re-
D5870 Practice for Calculating Property Retention Index of
quirementsfordevicesusedforexposingnonmetallicmaterials
Plastics
to laboratory light sources. This information is intended
E41 Terminology Relating to Conditioning (Withdrawn
3
primarily for producers of laboratory accelerated exposure
2019)
devices.
E171 Practice for Conditioning and Testing Flexible Barrier
1.3 This practice provides information on the use and Packaging
E644 Test Methods for Testing Industrial Resistance Ther-
interpretation of data from accelerated exposure tests. Specific
information about methods for determining the property of a mometers
E691 Practice for Conducting an Interlaboratory Study to
nonmetallic material before and after exposure are found in
standards describing the method used to measure each prop- Determine the Precision of a Test Method
E772 Terminology of Solar Energy Conversion
erty. Information regarding the reporting of results from
exposure testing of plastic materials is described in Practice E839 Test Methods for Sheathed Thermocouples and
Sheathed Thermocouple Cable
D5870.
G23 Practice for Operating Light-Exposure Apparatus
NOTE2—GuideG141providesinformationforaddressingvariabilityin
(Carbon-Arc Type) With and Without Water for Exposure
exposure testing of nonmetallic materials. Guide G169 provides informa-
3
(Withdrawn 2000)
of Nonmetallic Materials
tion for application of statistics to exposure test results.
NOTE 3—This standard is technically equivalent to ISO 4892, Part 1. G26 Practice for Operating Light-Exposure Apparatus
(Xenon-Arc Type) With and Without Water for Exposure
1.4 This standard does not purport to address all of the
of Nonmetallic Materials (Discontinued 2001) (With-
safety concerns, if any, associated with its use. It is the
3
drawn 2000)
responsibility of the user of this standard to establish appro-
1 2
This practice is under the jurisdiction ofASTM Committee G03 on Weathering For referenced ASTM standards, visit the ASTM website, www.astm.org, or
and Durability and is the direct responsibility of Subcommittee G03.03 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Simulated and Controlled Exposure Tests. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Jan. 1, 2019. Published February 2019. Originally the ASTM website.
3
approved in 1997. Last previous edition approved in 2010 as G151 – 10. DOI: The last approved version of this historical standard is referenced on
10.1520/G0151-19. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: G151 − 10 G151 − 19
Standard Practice for
Exposing Nonmetallic Materials in Accelerated Test Devices
1
that Use Laboratory Light Sources
This standard is issued under the fixed designation G151; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice providescovers general procedures to be used when exposing nonmetallic materials in accelerated test devices
that use laboratory light sources. Detailed information regarding procedures to be used for specific devices are found in standards
describing the particular device being used. For example, detailed information covering exposures in devices that use open flame
carbon arc, enclosed carbon arc, xenon arc, and fluorescent UV light source are found in Practices G152, G153, G154, and G155
respectively.
NOTE 1—Carbon-arc, xenon arc, and fluorescent UV exposures were also described in Practices G23, G26, and G53 which referred to very specific
equipment designs. Practices G152, G153, and G154, and G155 are performance based standards that replace Practices G23, G26, and G53.
1.2 This practice also describes general performance requirements for devices used for exposing nonmetallic materials to
laboratory light sources. This information is intended primarily for producers of laboratory accelerated exposure devices.
1.3 This practice provides information on the use and interpretation of data from accelerated exposure tests. Specific
information about methods for determining the property of a nonmetallic material before and after exposure are found in standards
describing the method used to measure each property. Information regarding the reporting of results from exposure testing of
plastic materials is described in Practice D5870.
NOTE 2—Guide G141 provides information for addressing variability in exposure testing of nonmetallic materials. Guide G169 provides information
for application of statistics to exposure test resultsresults.
NOTE 3—This standard is technically equivalent to ISO 4892, Part 1.
1.4 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D3924 Specification for Standard Environment for Conditioning and Testing Paint, Varnish, Lacquer, and Related Materials
3
(Withdrawn 2016)
D5870 Practice for Calculating Property Retention Index of Plastics
3
E41 Terminology Relating to Conditioning (Withdrawn 2019)
E171 Practice for Conditioning and Testing Flexible Barrier Packaging
E644 Test Methods for Testing Industrial Resistance Thermometers
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E772 Terminology of Solar Energy Conversion
1
This practice is under the jurisdiction of ASTM Committee G03 on Weathering and Durability and is the direct responsibility of Subcommittee G03.03 on Simulated
and Controlled Exposure Tests.
Current edition approved April 1, 2010Jan. 1, 2019. Published May 2010February 2019. Originally approved in 1997. Last previous edition approved in 20092010 as
G151 – 09.G151 – 10. DOI: 10.1520/G0151-10.10.1520/G0151-19.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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G151 − 19
E839 Test Methods for Sheathed Thermocouples and Sheathed Thermocouple Cable
G23 Prac
...
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