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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Precision and Bias The structural members of the test racks shall not constitute a backing to the specimens under test. In no case shall the specimen holder constitute a backing for that portion of the material to be evaluated.
ASTM D – 94 Standard Practice for Outdoor Weathering of Plastics
Several years of repeat exposures are needed to get an average test result for a given location. This is the recommended method for determining exposure stages when polymer degradation is being evaluated.
Specimen marking shall be in accordance asmt Practice G and shall be such that there is no interference with either the exposure or the subsequent testing.
Note 2 — This standard astj ISO The area beneath and in the vicinity of the weathering racks should be typical of the ground cover in that climatological area. 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.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed ashm Please first log in with a verified email before subscribing to alerts. Already Subscribed to this document.
ASTM D1435 – 13
For instance, summer exposures are generally more severe than winter exposures. Climatological variations within these areas may include those represented by desert, seashore salt airindustrial locations, tropical, and subtropical regions, plus areas exhibiting a wide range in solar radiant energy.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. 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 own responsibility. The actual yearly values may vary widely from Table 1.
NOTE 9—The average UV radiant exposures shown for subtropical and desert climates are based on several years of measurement in these test environments. It is intended for use with finished articles of commerce as well as with all sizes and shapes of test specimens.
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. They may be specimens suited to the means of evaluating the effects of weathering on a speci? A superscript epsilon e indicates an editorial change since the last revision or reapproval.
Standards Subsctiption may be the perfect solution. We have no document history for this standard. It is convenient to group specimens to be removed from exposure at the same time in one holder.
As the voice of the U. It is intended for use with finished articles of commerce as well as with all sizes and shapes of test specimens. Note 1 — See Practice G24 for aging under glass. Proceed to Checkout Continue Shopping. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability aatm regulatory limitations prior to use. Several years of d14355 exposures are needed to get an average test result for a given location.
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.
Subscription pricing is determined by: NOTE 4—At-latitude exposure provides maximum annual total solarradiant exposure at most non-subtropical sites. Note 1 — See Practice G24 for aging under glass. Exposures in several locations with different climates that represent a broad range of anticipated service conditions are recommended.
Specimen holders should be used to support the many sizes of specimens involved in this testing. These are dependent on the ASTM test methods for the speci?