D Practice for Outdoor Weathering of Plastics3 4 Discontinued; see Annual Book of ASTM Standards, Vol 5 Annual Book of. astm d 塑料的室外风化 – Designation: D – 99 Standard Practice for Outdoor Weathering of Pl. Find the most up-to-date version of ASTM D at Engineering
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Specimen marking shall be in accordance with Practice G and shall be such that there is no interference with either the exposure or the subsequent testing. Note 2 — This standard and ISO The ground cover should be low-cut grass in most temperate, tropical, and subtropical areas.
The specimens are mounted in the grooves of the insulators at a? satm
ASTM D1435 – 13
Several years of repeat exposures are needed to get an average aatm result for a given location. Table 1 shows typical UV radiant exposures for 12 months in subtropical and desert climates.
This is the recommended method for determining exposure stages when polymer degradation is being evaluated. 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. Note 1 — See Practice G24 for aging under glass. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their asgm responsibility.
Already Subscribed to this document. It is intended for use with finished articles of commerce as well as with all sizes and shapes of test specimens.
The insulators provide inert mounting while the slotted plate permits free circulation of air behind the specimen. In desert areas in which sand is the prevailing ground cover, coarse gravel is recommended to prevent abrasion and signi?
ASTM D – 13 – Standard Practice for Outdoor Weathering of Plastics
Standards Subsctiption may be the perfect solution. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Several years of repeat exposures are needed to get an average test result for a given location.
It cannot be assumed, therefore, that results from one exposure in a single location will be useful for determining relative durability in a different location. The exposure stages must be regarded as providing only a general indication of the degree of exposure, and the results should always be considered in terms of characteristics of the exposure site as well. Exposure test specimens should be large enough that mounting edges may be removed where evaluation test results would otherwise be affected.
Add to Alert PDF. An inherent limitation in solar-radiation measurements is that they do not re? Please first log in with a verified email before subscribing to alerts. The effect of backing is highly signi?
Aluminum extruded shapes have been found to be suitable. It cannot be assumed, therefore, that results from one exposure in a single location will be useful for determining relative durability in a different location.
ASTM D – 13 Standard Practice for Outdoor Weathering of Plastics
NOTE 8—The results for exposure stages of less than one year will depend on the season of the year in which the exposure was made. Precision and Bias Preferably, mark both specimen and specimen holder on the side not exposed to d11435, as advanced weathering can obscure even deeply scribed marks. If the document is revised or amended, you will be notified by email.
It is convenient to group specimens to be removed from exposure at the same time in one holder. You may delete a document from your Alert Profile at any time. All materials f1435 an unknown end use application will normally be run in an 5. In v1435 case shall the specimen holder constitute r1435 backing for that portion of the material to be evaluated. The exposure aperture of each frame shall be of sufficient size to expose the entire test area of each specimen when sufficient specimens are contained.
Link to Active This link will always route to the current Active version of the standard. Climatological variations within these areas may include those represented by desert, seashore salt airindustrial locations, c1435, and subtropical regions, plus areas exhibiting a wide range in solar radiant energy.
NOTE 4—At-latitude exposure provides maximum annual total solarradiant exposure at most non-subtropical sites. We have no document history for this standard.
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