ASTM D4329 PDF

ASTM D tests for fluorescent UV exposure of plastics. It covers specific procedures and test conditions based on practices ASTM G and ASTM G This standard is issued under the fixed designation D ; the number 1 This practice is under the jurisdiction of ASTM Committee D on Plastics. ASTM D – Designation: D – 05 Standard Practice for Fluorescent UV Exposure of Pla.

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Conduct these round robins in accordance with Practice E or Practice D and include a statistically representative sample of all laboratories or organizations who would normally conduct the exposure and property measurement. Often several exposure times such as, and hours also will be compared to each other.

Calculate retention of characteristic property in accordance with Practice D when it is reported. Send us a request Need help or have a question? This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results. The standard sample holders can hold one sample 3 x 12 inches 75 x mm or two samples 3 x 6 inches 75 x mm. Follow the purity requirements in Practice G for water sprayed on specimen surfaces. Assurance Testing Inspection Certification.

Note 2 — Additional information on sources of variability and on strategies for addressing variability in the design, execution, and data analysis of laboratory-accelerated exposure tests is found in Guide G A number in parentheses indicates the year of last reapproval.

Obtain mutual agreement between all concerned parties for the specic exposure cycle used.

ASTM D4329

Measure ambient temperature at a maximum distance of mm [6 in. Historical Version s – view previous versions of standard. The values given in brackets are for aastm only.

Do not use arbitrary acceleration factors relating time in an exposure conducted in accordance with this practice and time in an outdoor environment because they can give erroneous information. No direct correlation can be made atm accelerated weathering duration and actual outdoor exposure duration. Link to Active This link will always route to the current Active version of the standard. The values given in parentheses are for information only.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.

Accelerated Weathering (QUV) ASTM G, ASTM D, ASTM D, ISO

Up to 20 test samples are mounted in the QUV and subjected to a cycle of exposure to intense ultraviolet radiation followed by moisture exposure by condensation. An exposure time that produces a signicant change in one type of material cannot be assumed to be applicable to other types of materials. This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results. All concerned parties must agree on the control material used.

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A superscript epsilon e indicates an editorial change since the last revision or reapproval. Hemispherical on 37 Tilted Surface. The standardized time period needs to consider conditioning prior to testing. It is the responsibility of the user of this standard to establish appropriate safety and health practices and ast the applicability of regulatory limitations prior to use.

Therefore, no reference to the use of this practice should be made satm accompanied by a report prepared in accordance with Section 8 that describes the specific operating conditions used.

Current edition approved July 15, Parts may be accommodated depending on size. 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 D | Rycobel

Accelerated weathering provides exposed samples for comparison to unexposed control samples. Formally confirming that your products and services meet all trusted external and internal standards. The acceleration factor is materialdependent and is only valid if it is based on data from a sufficient number of separate exterior and laboratoryaccelerated exposures so that results used to relate times to failure in each exposure can be analyzed using statistical methods.

When specimens are removed from the exposure apparatus for 24 h or more and then returned for additional exposure, report the elapsed time as noted in accordance with Section 9. NOTE 5—Since the stability of the le specimen may also be timedependent, users are cautioned that over prolonged exposure periods, or where small differences in the order of acceptable limits are anticipated, comparison of exposed specimens with the le specimen may not be valid.

Originally approved in d429 All concerned parties must agree on the specic control material used. Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Measurements visual or instrumental should be made within a standardized time period or as agreed upon between the interested parties.

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If you feel that your comments have not d429 a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Periods of Exposure and Evaluation of Test Results 8. Refer to Practice G for detailed information x4329 the caveats applicable to use of results obtained in accordance with this practice.

Accelerated Weathering (QUV) ASTM G154, ASTM D4329, ASTM D4587, ISO 4892

Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.

Refer to Practice G for detailed information on the caveats applicable to use of results obtained in accordance with this practice.

Signicance and Use 4. When a single exposure period is used, select a time or radiant exposure that will produce the largest performance differences between the test materials or between the test material and the control material. Misleading results may be obtained by this method, since the masked portion of the specimen is still exposed to temperature and humidity cycles that in many cases will affect results.

The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena, such as, atmospheric pollution, biological attack, and saltwater exposure. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.

Unless supplied with a specic backing as an integral part of the test, specimens shall be mounted so that only the minimum specimen area required for support by the holder shall be covered. Warning— Variation in results may be expected when operating conditions are varied within the accepted limits of this practice.

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Expose replicates of the test specimen and the control specimen so that statistically signicant performance differences can be determined NOTE 8—Fischer illustrates use of rank comparison between test and control materials in specications.

The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena, such as, atmospheric pollution, biological attack, and saltwater astk.