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
|Published (Last):||1 May 2004|
|PDF File Size:||18.47 Mb|
|ePub File Size:||11.57 Mb|
|Price:||Free* [*Free Regsitration Required]|
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Exposures in several locations with different climates that represent a broad range of anticipated service conditions are recommended.
The results of tests conducted for less than 12 months will depend on the particular season of the year in which they begin. 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
Preferably, mark both specimen and specimen holder on the side not exposed to weather, as advanced weathering can obscure even deeply scribed marks. The results of tests conducted for less than twelve months will depend on the particular season of the year asrm which they begin. 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.
Aluminum extruded shapes have been found to be suitable.
In desert areas in which sand is the prevailing ground cover, coarse gravel is recommended to prevent abrasion and signi? Last previous edition D — Calculate retention of characteristic property according to Practice D when it is reported.
Need more than one copy? Note 2 — This standard and ISO This standard is not included in any packages. Note 1 — See Practice G24 for aging under glass.
Please first verify your email e1435 subscribing to alerts. This standard is subject to xstm at any time by the responsible technical committee and must be reviewed every? It is intended for use with? You may delete a document from your Alert Profile at any time. They may be specimens suited to the means of evaluating the effects of weathering on a speci?
Climatological variations within these areas may include those represented by desert, seashore salt airindustrial locations, tropical, and subtropical regions, plus asttm exhibiting a wide range in solar radiant energy.
Seasonal effects are averaged in exposures of several years. Already Subscribed to this document. The specimens are mounted in the grooves of the insulators at a?
NOTE 4—At-latitude exposure provides maximum annual total solarradiant exposure at most non-subtropical sites. This method of mounting is shown in Fig. As the voice of the U. The actual yearly values may vary widely from Table 1. Precision and Bias For instance, summer exposures are generally more severe than winter exposures. We have no document history for this standard. It is the responsibility of the user of this standard to establish appropriate safety asm health practices and determine the applicability of regulatory limitations prior to use.
Referenced Documents purchase separately E1435 documents listed below are referenced within the subject standard but are not provided as part of the standard. All materials of an unknown end use application will normally be run in an 5. The ground cover should be low-cut grass in most temperate, tropical, and subtropical areas. Your Alert Profile lists the documents that will ast, monitored.
The angle of the exposure rack relative to the horizontal can wstm depending upon the end-use conditions that are 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. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This is the recommended method for determining exposure stages when polymer degradation is being evaluated. 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.
NOTE 6—Sand as a ground cover may be desirable where the abrasive effects of exposure to wind-blown sand is a part of the desired exposure. Historical Version s – adtm previous d14335 of 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.
It is convenient to group specimens to be removed from exposure at the same qstm in one holder.
ASTM D1435 – 13
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. They shall be covered with inert wrapping to exclude light exposure during the exposure period.
When conditions of use are known, the specimen exposed will consist of the plastic material being evaluated plus suitable backing materials to conform to projected practice. Link to Active This link will always route to the current Active version of the standard.
The structural members of the test racks shall not constitute a backing to the specimens under test. Subscription pricing is determined by: