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 7—The same exposure stage by whichever method is used will not necessarily give the same changes in properties of the test specimen at different exposure sites. The area beneath and in the vicinity of the weathering racks should be typical of the ground cover in that climatological area.
It is convenient to group d11435 to be removed from exposure at the same time in one holder. D4135 2 — This standard and ISO 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.
Please first verify your email before subscribing to alerts. This is the recommended method for determining exposure stages when polymer degradation is being evaluated.
Link to Active This link will always route to the current Active version of the standard. Calculate retention of characteristic property according to Practice D when it is reported. Aluminum extruded shapes have been found to be suitable. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
It is intended for use with? NOTE 4—At-latitude exposure provides maximum annual total solarradiant exposure at most non-subtropical sites.
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 satm, or plasticizer loss. The specimens are mounted in the grooves of the insulators at a?
An inherent limitation in solar-radiation measurements is that they do not re? Several years of repeat asrm are needed to get an average test result for a given location.
If the document is revised or amended, you will be notified by email. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Current edition approved Nov. 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.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
ASTM D – 13 Standard Practice for Outdoor Weathering of Plastics
Preferably, mark both specimen and specimen holder on the side not exposed to weather, as advanced weathering can obscure even deeply scribed marks. You may delete a document from your Alert Profile at any time. Historical Version s – view previous versions of standard. As the voice of the U. A number in parentheses indicates the awtm of last reapproval.
All materials of an unknown end use application will normally be run in an 5. We have no amendments or corrections for this standard.
ASTM D1435 – 13
Exposures in several locations with different climates that represent a broad range of anticipated service conditions are recommended. If you feel that your comments have not received a fair hearing you should make your d4135 known to the ASTM Committee on Standards, at the address shown below.
In desert areas in which sand is the prevailing ground cover, coarse gravel is recommended to prevent abrasion and signi? 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. Several years of repeat exposures are needed to get an average test result for a given location.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
ASTM D – 13 – Standard Practice for Outdoor Weathering of Plastics
Add to Alert PDF. Seasonal effects are averaged in exposures of several years. The insulators provide inert mounting while the slotted plate permits free circulation of air behind the specimen. Precision and Bias They shall be covered with inert wrapping to exclude light exposure during the exposure period.
Please first log in with a verified email before subscribing to alerts. 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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