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ASTM D4329-05 PDF

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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A number in parentheses indicates the year of last reapproval.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Your Alert Profile lists the documents that will be monitored. 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. Subscription pricing is determined by: All specimens shall be exposed simultaneously in the same device.

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. 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. Ketola and Douglas Grossman, eds.

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

The values given in brackets are for information only. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. 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by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn. Send us a request Need help or have a question?

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Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Conduct these round robins in accordance with Practice E or Practice D d43299-05 include a statistically representative sample of all laboratories or organizations who would normally conduct the exposure and property measurement.

D432905 Consulting Sourcing Training. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena, such as, atmospheric zstm, biological attack, and saltwater exposure. Refer to Practice G for detailed information on the caveats applicable to use of results obtained in accordance with this practice. Standards can be obtained from appropriate standard authorities.

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

ASTM D – Standard Practice for Fluorescent UV Exposure of Plastics

Often several exposure times such d3429-05, and hours also will be compared to each other. All concerned parties must agree on the specic control material used.

When a single exposure period is used, select a atm or radiant exposure that will produce the largest performance differences between the test materials or between the test material and the control material.

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. NOTE 4—This is especially important when mechanical properties are being investigated.

ASTM D-4329-05 QUV

NOTE 7—For some materials, changes may continue after the specimen has been removed from the exposure apparatus. This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results. Validating the specifications, value and safety of your raw materials, products and assets. 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.

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It is recommended that deionized water be used for water used to produce condensation.

Already Subscribed to this document. 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, d4329-0 of exposed specimens with the le specimen may not be valid.

ASTM D QUV | Burch

Follow the purity requirements in Practice G for water sprayed on specimen surfaces. 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 An exposure time that produces a signicant change in one type of material cannot be assumed to be applicable to other types of materials.

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.