Designation: G? 12a Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials1. ASTM CommiKee E44 intends to address these concerns by creaIng a standard on meeIng the ASTM G‐ Standard PracIce for. OperaIng Fluorescent. Engaged Expert Terry Candlish discusses ASTM G and G tests which are used to evaluate sunlight and moisture exposure. ASTM.
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Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Evaluating how your products and services meet asgm exceed quality, safety, sustainability and performance standards. Validating the specifications, value and safety of your raw materials, products and assets.
Accelerated Weathering (QUV) ASTM G, ASTM D, ASTM D, ISO
Formally confirming that your products and services meet all trusted external and internal standards. Accelerated weathering simulates damaging effects of long term outdoor exposure of materials and coatings.
A QUV test chamber uses fluorescent lamps to provide a radiation spectrum centered in the ultraviolet wavelengths.
Moisture is provided by forced condensation, and temperature is controlled by heaters. No direct correlation can be made between accelerated weathering duration and actual outdoor exposure duration. 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.
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. 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. Typically, flat plaques or disks are used for accelerated weathering studies.
The standard sample holders can hold one sample 3 x 12 inches 75 x mm or two samples 3 x 6 inches 75 x mm. Parts may be accommodated depending on size.
Accelerated weathering provides exposed samples for comparison to unexposed control samples. Often several exposure times such as, and hours also will be compared to each other.
Standards can be obtained from appropriate standard authorities. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance 1g54-12. Inspection Validating the specifications, value and safety of your raw materials, products and assets.
Certification Formally confirming that your products and services meet all trusted external and internal standards. Auditing Consulting Sourcing Y154-12.
Assurance Testing Inspection Certification. Through our network of over 43, people in 1, laboratories and offices in countries, Intertek provides quality and safety solutions to a wide range of industries around the world.
Global Reach Intertek is the industry leader with over 42, people in 1, locations in over countries. Whether your business is local or global, we can ensure your products meet quality, health, environmental, safety, and social accountability standards for virtually any market around the g154-112.
ASTM G154 and G155 Explained
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