This standard is issued under the fixed designation D; the number 1 This practice is under the jurisdiction of ASTM Committee D01 on Paint and. Related. ASTM D defines fluorescent UV and condensation exposures of paint and related coatings,equivalent to ISO 31 Aug ASTM D _UV_resistance – Designation: D – 05 Standard Practice for Fluorescent UV-Cond.
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Industrial maintenance coatings G. 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. ASTM International is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services.
However, for users of equipment made by another manufacturer, the irradiance control system did not have the measurement inaccuracies described above, so running at the new set points will represent a change in the actual irradiance of the test.
Therefore, no reference to the use of this practice shall be made unless accompanied by a report prepared according to Section 10 ast describes the specific operating conditions used. Standards can be obtained from appropriate standards authorities. B The irradiance set point given is typical for devices operated without irradiance control.
ASTM D classification test for weather and UV resistance
Note 3—Additional information on sources of variability and on strategies for addressing variability in the design, execution and data analysis of laboratory accelerated sstm tests is found in Guide G Reproducibility of test results between asmt has been shown to be good when the stability of materials is evaluated in terms of performance ranking compared to other materials or to a control. Work D45887 s – proposed revisions of this standard. The ability of a paint or coating to resist deterioration of its physical and optical properties caused by exposure to light, heat, and water can be very significant for many applications.
Accelerated Weathering by QUV. Link to Active This link will always route to the current Active version of the standard. Our laminate is type tested at the renowned international testing laboratory Exova to certify our products to be weather resistant. Link to Active This link will always route to the current Active version of the standard.
This practice is intended to induce zstm changes associated with end-use conditions, including the effects of sunlight, moisture, and heat. Our glass reinforced polyester laminate is tested in a controlled laboratory with a simulation of accelerated weather with an exposure cycle of 8 hours UV followed by 4 hours condensation continuously.
Accelerated Weathering by QUV
D Temperature is at equilibrium for either an uninsulated or insulated black panel, although the response of the insulated black panel might be slower than that for the uninsulated black panel. G Historical convention has established this as a very commonly used test cycle.
The GRP laminate should not display any deterioration like chalking, flaking, wrinkling, blistering or cracking. The standard is primarily based on the external integrity and appearance of our GRP enclosures when exposed s4587 outdoor conditions over an aztm period.
Additional exposure cycles are described in Practice G Practice has been withdrawn and replaced by Practice Gwhich describes performance criteria for all exposure devices that use laboratory light sources, and by Practice Gwhich gives requirements for exposing nonmetallic materials in fluorescent UV devices. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.
A The cycles described are not listed astn any order indicating importance, and are not necessarily recommended for the applications listed. ASTM D classification xstm the standard practice for fluorescent UV and condensation exposures of paint and related coatings. A QUV test chamber uses fluorescent lamps to provide a radiation spectrum centered in the ultraviolet wavelengths. The previous set points were 0. Practice G 53 has been withdrawn and replaced by Practice Gwhich describes performance criteria for all exposure devices that use laboratory light sources, and by Practice Gwhich gives requirements for d45587 nonmetallic x4587 in fluorescent UV devices.
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.
Work Item s – proposed revisions of this standard. 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. The spectral power distribution of light from fluorescent UV lamps is significantly different from that produced in light and water exposure devices using other light sources.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Accelerated weathering simulates 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 – ultraviolet radiation, moisture and heat.
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. Due to copyright restrictions, we are not able to provide copies of standards.
No direct correlation can aetm made between accelerated weathering duration and actual outdoor exposure duration. This cycle may not adequately simulate the effects of outdoor exposure. Table 1 describes commonly used test conditions.
Adherence to the standard is mandatory across the GCC region and globally. Often several exposure times such as, and hours also will be compared to each other. The type and rate of degradation and the performance rankings produced in exposures to fluorescent UV lamps can be much different from those produced by exposures to other types of laboratory light sources.
Cautions Variation in results may be expected when different operating conditions are used. Asgm practice also covers the preparation of test specimens, and the evaluation of test results.
Where is it tested? E Typical uses do not imply that results from exposures of these materials according to the cycle described will correlate to those from actual use conditions.
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. The measurement data used to establish these set points was inaccurate, due to an error in calibration on the part of one manufacturer. This practice also covers the preparation of test specimens, and the evaluation of test results. C Previous editions atm Practice D contained non-mandatory irradiance set points in Table 1 that were commonly used in the industry.
Moisture is provided by forced condensation, and temperature is controlled by heaters.