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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NOTE 4—At-latitude exposure provides maximum annual total solarradiant exposure sstm most non-subtropical sites. NOTE 9—The average UV radiant exposures shown for subtropical and desert climates are based on several years of measurement in these test environments. Several years of repeat exposures are needed to get an average test result for a given location.
astm d 塑料的室外风化_百度文库
A number in parentheses indicates the year of last reapproval. X1435 is intended for use with? Standards Subsctiption may be the perfect solution. Note 1 — See Practice G24 for aging under glass.
Originally published as D — 56 T. This standard is also available to be included in Standards Subscriptions. Precision and Bias 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.
We have no document history for this standard. Your Alert Profile lists the documents that will be monitored. 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. 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.
The structural members of the test racks shall not constitute a backing to the specimens under test. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.
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ASTM D1435 – 13
Seasonal effects are averaged in exposures of several years. Climatological variations within these d11435 may include those represented by desert, seashore salt airindustrial locations, tropical, and subtropical regions, plus areas exhibiting a wide range in solar radiant energy.
The area beneath and in the vicinity of the weathering racks should be typical of the ground cover aastm that climatological area. 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 D – 13 – Standard Practice for Outdoor Weathering of Plastics
Note 2 — This standard and ISO In desert areas in which sand is the prevailing ground cover, coarse gravel d145 recommended to prevent abrasion and signi? The angle of the exposure rack relative to the horizontal can vary depending upon the end-use conditions that are being evaluated.
The effect of backing is highly signi? Note 2 — This standard and ISO Please first log in with a verified email before subscribing to alerts. An inherent limitation in solar-radiation measurements is that they do not re?
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. It is intended for asstm with xstm articles of commerce as well as with astk sizes and shapes of test specimens. Current edition approved Nov. Exposures in several locations with different climates that represent a broad range of anticipated service conditions are recommended.
Fasteners used to attach specimens to the test rack shall provide for secure attachment but allow specimens to expand or contract with thermal changes, moisture absorption or desorption, or plasticizer loss. This standard has been approved for use by agencies of the Department of Defense. They may be specimens suited to the means of evaluating the effects of weathering on a speci? 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.
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