ASTM G151 PDF
ASTM G – 00 Standard Practice for Exposing Nonmetallic. Materials in Accelerated Test Devices that Use Laboratory. Light Sources. View on Information. ASTM G UV EXPOSURE (GENERAL). This practice provides general procedures to be used when exposing nonmetallic materials in accelerated test. 21 Jun ASTM G – Designation: G – 09 Standard Practice for Exposing Nonmetallic Materials in Ac.
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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.
ASTM G | Rycobel
Even though it is very tempting, calculation of an acceleration factor awtm x h or megajoules of radiant exposure in a laboratory accelerated test to y months or years of exterior exposure is not recommended. More specific information on how each factor may alter stability ranking of materials is given in Appendix X1.
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.
Guide G provides information for ast of statistics to exposure test results Note 3—This standard is technically equivalent to ISOPart 1. Information regarding the reporting of results from exposure testing of plastic materials is described in Practice D ASTM Committee G3 is developing a standard guide for application of statistics to exposure test results.
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. Acceleration factors are material dependent and can be significantly different for each material and for different formulations of the same material. Guide G provides information for application of statistics to exposure test results.
Differences in the spectral distribution between the laboratory light source and solar radiation. Standards monitoring is a free service designed for you who wish to be alerted of changes to or new editions of the standards required in your work.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM G – UV EXPOSURE (GENERAL)
Results from accelerated exposure ast, conducted according to this standard are best used to compare the relative performance of materials. Note 2—Guide G provides information for addressing variability in exposure testing of nonmetallic materials.
These are inappropriate uses of reference materials when 1g51 are not sensitive to exposure stresses that produce failure in the test material or when the reference material is very sensitive to an exposure stress that has very little effect on the test material.
Acceleration factors calculated based on the ratio of irradiance between a laboratory light source and solar radiation, even when identical bandpasses ashm used, do not take into consideration the effects on a material of irradiance, temperature, moisture, and differences in spectral power distribution between the laboratory light source ast solar radiation. Exposure conditions that produce unrealistic temperature differences between light and dark colored specimens.
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 GGGand G respectively.
Note 6—Practice G describes procedures for selecting and characterizing weathering reference materials used to establish consistency y151 operating conditions in a laboratory accelerated test. Comparisons between materials are best made when they are tested at the same time in the awtm exposure device. Results can be expressed by comparing the exposure time or radiant exposure necessary to change a characteristic property to some specified level. 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.
Work Item s – proposed revisions of this standard. The benefits of a subscription: The test material then is evaluated.
You need to log in before adding standards to the monitoring service. Note 5—Definitions for control and reference material that are appropriate to weathering tests are found in Terminology G The moment new editions of the standards you monitor are released, changes are made, or appendixes are published, you will be alerted by email.
Start Webshop Product catalog Product presentation. This ensures that g1511 are always up-to-date and saves you both time and money. NOK 1 ,00 excl. Detailed information regarding procedures to be used for specific devices are found in standards describing the particular device being used. 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.
Hemispherical on 37 Wstm Surface. A web subscription provides an easy and secure access to standards, and you are guaranteed to always have the latest edition. Historical Version s – view previous versions of standard. Detailed information regarding procedures to be used for specific devices are found in standards describing the particular device being used.
Variability in the aetm of degradation in both actual use and laboratory accelerated exposure test can have a significant effect on the calculated acceleration factor.