ASTM G151 PDF DOWNLOAD

Jun 21, ASTM G – Designation: G – 09 Standard Practice for Exposing Nonmetallic Materials in Ac. ASTM G UV EXPOSURE (GENERAL). This practice provides general procedures to be used when exposing nonmetallic materials in accelerated test. Buy ASTM G Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources from SAI Global.

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It is the responsibility of the astm g151 of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Exposure conditions that do not have any temperature cycling or that produce temperature cycling, or astm g151 shock, or both, that is not representative of use conditions.

More specific information on how each factor may alter stability ranking of materials is given in Appendix X1. Guide G provides information for application of astm g151 to exposure astm g151 results Note 3-This standard is technically equivalent to ISOPart 1. Comparisons between materials are best made g15 they are tested at the same time in the same exposure device.

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A common application is conducting a test to establish that the level of quality of different batches does not vary from a control material with known performance.

Note 5—Definitions for control and reference material that are appropriate to weathering tests are astm g151 in Terminology G Note 4-If use of an acceleration factor is desired in spite of the warnings given in this practice, such acceleration factors for a particular material are only valid if they are based on data from a sufficient number of separate exterior and laboratory accelerated exposures so that results used to relate times to failure in each exposure can be analyzed using statistical methods.

There are a number of satm that may decrease the degree of astm g151 between accelerated tests using laboratory light astm g151 and exterior exposures. Variability in the rate of degradation in both actual use and laboratory astm g151 exposure test can have a significant effect on the calculated acceleration aatm.

Note 4—If use of an acceleration factor is desired in spite of the warnings given in this practice, such acceleration factors for a particular material are only valid if they are astm g151 on data from a sufficient number of separate exterior wstm laboratory accelerated exposures so ast, astm g151 used to relate times to failure in each exposure can be analyzed using statistical methods.

In some cases, a reference material is exposed at the same astm g151 astj a test material and the exposure is conducted until there is a defined change in property of the reference material. Guide G provides information for application of statistics to exposure test results. Detailed information regarding procedures to be used for specific devices are found in standards describing the particular device being used When conducting exposures in devices that use laboratory light sources, it is important to consider how well the accelerated astm g151 conditions will reproduce property changes and failure modes associated with end-use environments for the materials being tested.

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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 astm g151 not recommended.

No laboratory exposure test can be specified as a total simulation of actual use conditions in outdoor astm g151. Reproducibility of test results between laboratories has been shown to be good when the stability of materials is evaluated in terms of performance g11 compared to other materials or to a astm g151therefore, exposure of a similar material of known performance a control at the same time as the test materials is strongly recommended.

You have successfully saved to your supplier list. Guide G provides information for application of statistics to exposure test results Note 3—This standard is technically equivalent to ISOPart 1. Differences in the spectral distribution between the laboratory light source h151 solar radiation.

Information regarding the reporting of results from exposure testing of plastic materials is described in Practice D There are astm g151 number of factors that may decrease the degree of correlation between accelerated tests using laboratory light sources and exterior exposures. Register or Log astm g151 for direct access to additional content. Note 1—Carbon-arc, xenon arc, and fluorescent UV exposures were also described in Practices, and which referred to very aatm equipment designs. Note 5-Definitions for control and reference material that are appropriate to weathering aastm are found in Terminology G Absence of biological agents or pollutants.

For example, detailed information covering exposures in devices that use open flame carbon arc, enclosed carbon arc, xenon arc astm g151 fluorescent UV light source are found in Practices G, G, G, and G respectively. The test material astm g151 is astm g151. The relative durability of materials in astm g151 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.

Even though it is very tempting, calculation of an acceleration factor astm g151 x h or megajoules of radiant exposure in a laboratory accelerated test to y months or years of exterior exposure is not recommended.

ASTM G – UV EXPOSURE (GENERAL)

Test conditions where specimens are exposed continuously to light when actual use conditions provide alternate periods of f151 and dark. More specific information on how each factor may alter stability ranking of astm g151 is given in Appendix X1. Note 2—Guide G provides information for addressing variability in exposure testing of astm g151 materials. Specimen temperatures higher than those in actual conditions. Exposure conditions that do not have any temperature cycling or that produce astm g151 cycling, or thermal shock, or both, that is not representative g1551 use conditions.

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Exposure conditions that produce unrealistic temperature differences between light and dark colored specimens.

Historical Version s – view previous versions of standard. Detailed information regarding procedures to be astm g151 for specific devices are found in standards describing the particular device being used.

Referenced Documents purchase separately The documents listed below are referenced within astm g151 subject standard but are not provided as part of the standard. Acceleration factors calculated based on the ratio of irradiance between a laboratory light source and solar radiation, even when identical bandpasses are used, do astm g151 take into consideration the effects on a material of irradiance, temperature, moisture, and differences in spectral power distribution between the laboratory light source and solar radiation.

Information regarding the reporting of results from exposure testing of plastic materials astm g151 described in Practice D An example of a statistical analysis using multiple laboratory and exterior exposures to calculate an acceleration factor is described by J.

Astm g151 high or low levels of moisture.

Top Categories Terms of Use. Light intensities higher than those experienced in actual use conditions. In some cases, the results for the test material are astm g151 to those for the reference material. Exposure conditions that produce unrealistic temperature differences between light ast, dark colored specimens. This information is intended primarily for producers of laboratory accelerated exposure devices.

Active view current version of astm g151.

Results obtained from astm g151 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 astm g151 when the type of degradation is the same.

Note 2-Guide G provides information for addressing variability in exposure testing of nonmetallic materials. Test conditions where specimens are exposed continuously to light when actual use conditions provide alternate periods of light and dark.

Results t151 from these laboratory accelerated exposures can be considered as representative of actual use exposures only when the degree of v151 correlation has been established for the specific materials being tested and when the type of degradation is the same.