October 12, 2020 By admin 0

ASTM D4459 PDF

This standard is issued under the fixed designation D ; the number 1 This practice is under the jurisdiction of ASTM Committee D20 on. It is the responsibilty of the Lab Manager to verify this setup is acceptable for the particular application or test method. ***. Test Method: ASTM D Buy ASTM D PRACTICE FOR XENON-ARC EXPOSURE OF PLASTICS INTENDED FOR INDOOR APPLICATIONS from SAI.

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Polystyrene Lightfastness Standards are included among the test samples to monitor and verify the performance of the equipment. It is the responsibility of the user of f4459 standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Xenon-Arc Accelerated Exposure

Standard specimens are 69mm x mm. Smaller sizes, or slightly larger sizes, d44559 be accommodated, but this equipment does not readily accept actual parts. This practice uses exposure in a xenon-arc device equipped with window glass filters and operated in accordance with Practices G and G Historical Version s – view previous versions of standard.

Up to 60 test samples are mounted in the Xenon Arc and subjected to a cycle of exposure to specified combinations of light, humidity, temperature and water spray. Often several exposure times such as, and hours also will be compared to each other. Testing Evaluating how asgm products and services meet and exceed quality, safety, sustainability and performance standards. No direct correlation can be made between accelerated weathering duration and actual asstm exposure duration.

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Glass filters around the xenon arc modify the light spectrum to simulate the appropriate end use conditions. Various cycles are defined by the appropriate specifications depending upon the intended end use application.

It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. Send us a request Wilton UK: Moisture is provided by a humidifier and direct spray, and temperature is controlled by heaters.

Xenon-Arc Accelerated Exposure

Link to Active This link will always route to the current Active version of the standard. Therefore, all references to the use of this practice must be accompanied by a report prepared in accordance with Section 9 that describes the specific operating conditions 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.

Validating the specifications, value and safety of your raw materials, products and assets. Note 3 — 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 Microprocessors monitor and precisely control asm radiation applied to the test samples. Accelerated weathering simulates the damaging effects of long term outdoor exposure of materials and coatings by exposing test samples to varying conditions of the most aggressive components of weathering – light, moisture, and heat.

Significant factors include regulation of line voltage, temperature and humidity control, and condition and age of the lamps and filters.

Refer to Practice G for detailed information on the caveats applicable to use of results obtained in accordance with this practice. Certification Formally confirming that your products and services meet all trusted external and internal standards.

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Accelerated weathering provides d4549 samples for comparison to unexposed control samples. These cycles would be continued for extended periods of time – up to thousands of hours – simulating even aastm periods of time in the real world.

Global Reach Intertek is the industry leader with over 42, people in 1, locations in over countries. Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.

Need help or have a question? Assurance Testing Inspection Certification. Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. Note 1 — There is no known ISO equivalent to 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. A Weather-Ometer uses a xenon arc light source to provide a radiation spectrum that simulates natural sunlight.

Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Through our network of over 43, people in 1, laboratories and offices in countries, Intertek provides quality and safety solutions to a asttm range of industries around the world. Formally confirming that your products and services meet all trusted external and internal standards.