Wat is PDF History ASTM D4329 PDF

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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Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Assurance Testing Inspection Certification.

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

Typically, flat plaques or disks are used for accelerated weathering studies. Auditing Consulting Sourcing Training. Significant factors include regulation of line voltage, temperature of the room in atm the device operates, temperature control, and condition and age of the lamp.

Originally approved in Measure ambient temperature at a maximum distance of mm [6 in. Current edition approved July 15, Often x4329 exposure times such as, and hours also will be compared to each other.

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

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.

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 This d43229 surface must not be used as part of the test area.

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.

D — 05 Standard Practice for Fluorescent UV Exposure of Plastics1 This standard is issued under the xed designation D ; the number immediately ashm the designation indicates the year of original adoption or, in the case of revision, the year of last revision.

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ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Inspection Validating the specifications, value and safety of your raw materials, products and assets.

Do not place the apparatus near a heat source such as an oven. NOTE 6—An example of a statistical analysis using multiple-laboratory and exterior exposures to calculate an acceleration factor is described by Simms. Referenced Documents purchase separately The documents listed below are referenced within the subject d432 but are not provided as part of the standard.

It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. This practice is intended to induce property changes associated with end-use conditions, including the effects of d329 solar d429, moisture, and heat. All concerned parties must agree on the control material used. 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.

Certification Formally confirming d3429 your products and services meet all trusted external and internal standards. Ketola and Douglas Grossman, eds.

A superscript epsilon e indicates an editorial change since the last revision or reapproval. Warning— Variation in results may be expected when operating conditions are varied within the accepted limits of this practice. Formally confirming that your products asttm services meet all trusted external and internal standards.

Refer to Practice G for detailed information s4329 the caveats applicable to use of results obtained in accordance with this practice. Moisture is provided by forced condensation, and temperature is controlled by heaters. 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.

Standards can be obtained from appropriate standard authorities. 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.

Need help or have a question? NOTE 7—For some materials, changes may continue after the specimen has been removed from the exposure apparatus. 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. 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 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. Hemispherical on 37 Degree Tilted Surface 2. Accelerated ast, provides exposed samples for comparison to unexposed control samples.

Accelerated weathering simulates damaging effects of long term outdoor exposure of materials and coatings. Signicance and Use 4. Hemispherical on 37 Tilted Surface. 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.

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 astmm are anticipated, comparison of exposed specimens with the le specimen may not be valid. Send us a request Wilton UK: Whether your business is local or global, we can ensure your products asttm quality, health, environmental, safety, and social accountability standards for virtually any market around the world.

ASTM D – UV EXPOSURE OF PLASTICS

Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Send us a request Need help or have a question? Where practical, it is recommended that specimens be sized to t specimen holders and racks supplied with the exposure apparatus. Testing Evaluating how your products and services meet and exceed quality, qstm, sustainability and performance standards.