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

Where practical, it is recommended that specimens be sized to t specimen holders and racks supplied with the exposure apparatus. D — 05 Standard Practice for Fluorescent UV Exposure of Plastics1 This standard is issued astmm the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. 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. This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results.

Through our network of over 43, people in 1, laboratories and offices f4329 countries, Intertek provides quality and safety solutions to a wide range of industries d44329 the world.

Refer to Practice G for detailed information on the caveats applicable to use of results obtained in accordance with this practice. The acceleration factor is materialdependent and is only valid if it is based on data from a sufficient number of aetm exterior and laboratoryaccelerated exposures so that results used to relate times to failure in each exposure can be analyzed using statistical methods.

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A superscript epsilon e indicates an editorial change since the last revision or reapproval. 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.

For instance, if two specimens are stacked vertically in each holder, then the top and bottom specimens should switch places halfway through the test.

Standards can be obtained from appropriate standard authorities. Precision and Bias Warning— Variation in results may be expected when operating conditions are varied within the accepted limits of this practice. No direct correlation can be made between accelerated weathering duration and actual outdoor exposure duration.

Measure ambient temperature at a maximum distance of mm [6 in. Accelerated weathering provides exposed samples for comparison to unexposed control samples. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. All concerned parties must agree on the control material used.

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

Warning— Variation in results may be expected when operating conditions are varied within the accepted limits of this practice. Assurance Testing Inspection Certification. Attach porous specimens to a solid backing such as aluminum that can act as a vapor barrier. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

These cycles would be continued for extended periods of time – up to thousands of hours – simulating even longer periods of time in the real world. 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. All concerned parties must agree on the specic control material used. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

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Certification Formally confirming that your products and services meet all trusted external and internal standards. Validating the specifications, value and safety of your raw materials, products and assets.

ASTM D | Rycobel

Ketola and Douglas Grossman, eds. The values given in brackets are for information only. However, performance comparisons under the controlled conditions of accelerated weathering can be compared to documented performance of materials and coatings that have experienced extended periods of end use exposure. Current edition approved July 15, Signicant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamp.

A number in parentheses indicates the year of last reapproval. Need help or have a question? 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.

Typically, flat plaques or disks are used for accelerated weathering studies.

When specimens are removed from the exposure apparatus for sstm h or more and then returned for additional exposure, report the elapsed time e4329 noted in accordance with Section 9. Therefore, no reference to the use of this practice should be made unless accompanied by a report prepared in accordance with Section 8 that describes the specific operating conditions used.

Parts may be accommodated depending on size. The values given in parentheses are for information only.