The Test Protocol that was followed is an adaptation of ASTM D where 1E 1E Buy ASTM D PRACTICE FOR FLUORESCENT UV EXPOSURE OF PLASTICS from SAI Global. ASTM D Standard Practice for Fluorescent UV Exposure of Plastics. This practice covers specific procedures and test conditions that are applicable.
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ASTM D-4329-05 QUV
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. Warning— Variation in results may be expected when operating conditions are varied within the accepted limits of this practice.
Add to Alert PDF. 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. Accelerated weathering simulates damaging effects of long term outdoor exposure of materials and coatings. Assurance Enabling you to identify and mitigate the intrinsic risk in d4329-50 operations, supply chains and business processes.
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. Expose replicates of the test specimen and the control specimen so that statistically signicant performance differences can be determined NOTE 8—Fischer illustrates d4239-05 of rank comparison between test and control materials in specications.
Need help or have a question? For measurements 8 Fischer, R. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. Instrumental measurements are recommended whenever possible.
Measure ambient temperature at a maximum distance of mm [6 in. Signicance and Use 4. Send us a request Wilton UK: Ketola and Douglas Grossman, eds.
ASTM D QUV | Burch
Already Subscribed to this document. 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. Please first verify your email before subscribing to alerts. 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 superscript epsilon e indicates an editorial change since the last revision or reapproval. Operate the device continuously. The values given in brackets are for information only. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
Inspection Validating the specifications, value and safety of your raw materials, products and assets. Assurance Testing Inspection Certification. Obtain mutual agreement between all concerned parties for the specic exposure cycle used. Your Alert Profile lists the documents that will be monitored.
An exposure time that produces a signicant change in one type of material cannot be assumed to be applicable to other types of materials. Refer to Practice G for detailed information on the caveats applicable to use of results obtained in accordance with this practice.
This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results. Proceed to Checkout Continue Shopping. Moisture is provided by forced condensation, and temperature is controlled by heaters. This standard is also available to be included in Standards Subscriptions. 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 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
A number in parentheses indicates the year of last reapproval. For instance, if two specimens are stacked vertically in each holder, then the top and bottom specimens should switch places halfway through the test. Global Reach Intertek is the industry leader with over 42, people in 1, locations in over countries. A QUV test chamber uses fluorescent lamps to provide a radiation spectrum centered in the ultraviolet wavelengths. Originally approved in If four specimens are stacked vertically, then the specimens should be repositioned vertically three times during the test.
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.
Hemispherical on 37 Degree Tilted Surface 2. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Send us a request Need help or have a question? Please first log in with a verified email before subscribing to alerts. Formally confirming that your products and services meet all trusted external and internal standards.
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 specic operating conditions used.