ASTM D4587 PDF
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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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. asfm
Note Previous versions of this practice referenced fluorescent UV devices described by Practice G 53, which described very specific equipment designs. 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. Interlaboratory ashm are valid asgm when all laboratories use the same design of fluorescent UV device, lamp, and exposure conditions.
ASTM D classification test for weather and UV resistance
Historical Version s – view previous versions of standard. 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. Other irradiance levels may be used, but must be described in the report. However, performance comparisons under the controlled conditions of accelerated weathering can be compared to documented performance asym materials and coatings that have experienced extended periods of end use exposure.
It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. 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. The set points shown in this edition of D do not change the actual irradiances that have been historically used by these users. Adherence to the standard is mandatory across the GCC region and globally.
This practice also covers the preparation of test specimens, and the evaluation of test results. Practice has been withdrawn and replaced by Practice Gwhich describes performance criteria for all exposure devices that use laboratory light sources, and by Practice Gwhich gives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. Refer to Practice G for detailed information on the caveats applicable to use of results obtained according to this practice.
What is the test? Reproducibility of test results between laboratories has been shown to astmm good when the stability of materials is evaluated in terms of performance ranking compared to other materials or to a control. Industrial maintenance coatings G. 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 exposing nonmetallic materials in fluorescent UV devices.
Note 1—Previous versions of this practice referenced fluorescent UV devices described by Practicewhich described very specific equipment designs. 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.
Thereafter the simulation, the GRP laminate is physically inspected and compared to a control specimen. Test results will depend upon the care that is taken to operate the equipment according to Practice G 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 provides exposed samples for comparison to unexposed control samples. G Historical convention has established this as a very commonly used test cycle. 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. Moisture is provided by forced condensation, and temperature is controlled by heaters.
Table 1 describes commonly used test conditions.
Accelerated Weathering by QUV. 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. 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.
Due to copyright restrictions, we are not able to provide copies of standards. The protective gelcoat serves as the first line of defense outdoors against weathering and UV exposures in extreme hot and cold climates.
Accelerated Weathering by QUV ASTM D ASTM D ISO SAE J
The standard is primarily based on the external integrity and appearance of our GRP enclosures when exposed to outdoor conditions over an extended period. These cycles would be continued for extended periods asttm time – up to thousands of hours – simulating even longer periods of time in the real world. Significant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and awtm of the lamps.