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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They may be specimens suited to the means of evaluating the effects of weathering on a speci? Please first log in with a verified email before subscribing to d145. We have no amendments or corrections for this standard. You may delete a document from your Alert Profile at any time. This is the recommended method for determining exposure stages when polymer degradation is being evaluated.
They shall be covered with inert wrapping to exclude light exposure during the exposure period. The exposure aperture of each frame wstm be of sufficient size to expose the entire test area of each specimen when sufficient specimens are contained. Preferably, mark both specimen and specimen holder on the side not exposed to weather, as advanced weathering can obscure even deeply scribed marks.
The specimens are mounted in the grooves of the insulators at awtm
ASTM D1435 – 13
aetm It shall always be used in relation to an end-use system rather than as a standard mounting method. 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. 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.
Seasonal effects are averaged in exposures of several years.
astm d 塑料的室外风化_百度文库
Several years of repeat exposures are needed to get an average test result for a d1345 location. It is intended for use with finished articles of commerce as well as with all sizes and shapes of test specimens.
Subscription pricing is determined by: These are dependent on the ASTM test methods for the speci? NOTE 9—The average UV radiant exposures shown for subtropical and desert climates are based on several years of measurement in these test environments.
The ground cover should be low-cut grass in most temperate, tropical, and subtropical areas. The relative durability of plastics in outdoor use can be very different depending on the location of the exposure because of differences in ultraviolet UV radiation, time of wetness, temperature, pollutants, and other factors. Link to Active This link will always route to the current Active version of the standard.
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Table 1 shows typical UV radiant exposures for 12 months in subtropical and desert climates. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Already Subscribed to this document. The actual yearly values may vary widely from Table 1. We have no document history for x1435 standard. Historical Version s – view previous versions of standard.
Climatological variations within these areas may include those represented by desert, seashore salt airindustrial locations, tropical, and subtropical regions, c1435 areas exhibiting a wide range in solar radiant energy.
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A superscript epsilon e indicates an editorial change since the last revision or reapproval. Precision and Bias The area beneath and in the vicinity of the weathering racks should be typical of the ground cover in that climatological area.
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It cannot be assumed, therefore, that results from one exposure in a single location will be useful for determining relative durability in a atsm location. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
It is intended for use with finished articles of commerce as well as with all sizes and shapes of test specimens. Specimen holders should be used to support the many sizes of specimens involved in this testing. Aluminum extruded shapes have been found to be suitable. The results of tests conducted for less than twelve months will depend on the particular season of the year in which they begin. Current edition approved Nov.
The values given in parentheses are for information only. 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.