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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In some cases, the results for the test material are compared to those for the reference material. Practices GGand Gand G are performance based standards that replace Practices, and.
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. If you need to be able to add standards to the monitoring service, you must register as a user with your own username and password.
Standards monitoring is a free service designed for you who wish to be alerted of changes to or new editions of the standards adtm in your work. Active view current version of standard. Link to Active This link will always route to the current Active version of the standard. 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.
Referenced Documents purchase separately The documents listed below are referenced within the subject g1151 but are not provided as part of the standard. 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. These acceleration factors are not valid for several reasons. A web subscription provides an easy and secure access to standards, and you are guaranteed to always have the latest edition.
Note 5—Definitions for control and reference material that are appropriate to weathering qstm are found in Terminology G Hemispherical on 37 Xstm Surface. Qstm to Active This link will always route to the current Active version of the standard.
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.
Comparisons between materials are best made when they are tested at the same time in the same exposure device. 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 Aztm respectively.
Read more about subscriptions. ASTM Committee G3 is developing a standard guide for application of statistics to exposure test results.
ASTM G | Rycobel
Differences in the spectral distribution between the laboratory light source and solar radiation. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Detailed information regarding procedures to be used for specific devices are found in standards describing the particular device being used. 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. Start Webshop Product catalog Product presentation. 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.
More specific information on how each factor may alter stability ranking of materials is given in Appendix X1. Information regarding the reporting of results from exposure testing of plastic materials is described in Practice D This ensures that you are always up-to-date and saves you both time and money. Results from accelerated exposure tests conducted according to this standard are best used to compare the relative performance of materials.
Subscription – always available and updated A web subscription provides an easy and secure access to standards, and you are guaranteed to always have the latest edition. 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. Techstreet standards in subscription.
Exposure conditions that produce unrealistic temperature differences between light and dark colored specimens.
ASTM G – UV EXPOSURE (GENERAL)
Work Item s – proposed revisions of this standard. These are inappropriate uses of reference materials when they 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. Information regarding the reporting of results from exposure testing of plastic materials is described in Practice D NOK 1 ,00 excl.
For example, detailed information covering exposures in devices that use carbon-arc, xenon-arc, and fluorescent UV light sources are found in Practices G, G, and G, and G respectively.
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. The moment new editions of the standards you monitor are released, changes are made, or appendixes are published, you will be alerted by email.
Monitoring 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. Variability in the rate of degradation in both actual use and laboratory accelerated exposure test can have a significant effect on the calculated acceleration factor. You need to log b151 before adding standards to the monitoring service. In some cases, a reference material is exposed at the same time as a test material and the exposure is conducted until there is qstm defined change in property of the reference material.
Exposure conditions that b151 not have any temperature cycling or that produce temperature cycling, or thermal shock, or both, that is not representative of use conditions.
Note Guide G provides information for addressing variability in exposure testing of nonmetallic materials.
Detailed information regarding procedures to be used for specific devices are found in standards describing the particular device being used. This information is intended primarily for producers of laboratory accelerated exposure devices.
Work Item s – proposed revisions of this standard.
Test conditions where specimens are exposed continuously to light when actual use conditions awtm alternate periods of light and dark. Note Carbon-arc, xenono-arc, and fluorescent UV exposures are also described in Practices G23, G26, and G53 which described very specific equipment designs.
Note 1—Carbon-arc, xenon arc, and fluorescent UV exposures were also described in Practices, and which referred to very specific equipment designs.
Even though it is very tempting, calculation of an acceleration factor relating x h or megajoules of radiant exposure in a laboratory accelerated aztm to y months or years of exterior exposure is not recommended.
In some applications, weathering reference materials are used to establish consistency of the operating conditions in an exposure test.