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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In desert areas in s1435 sand is the prevailing ground cover, coarse gravel is recommended to prevent abrasion and signi? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Please first log in with a verified email ast, subscribing to alerts. Specimen marking shall be in accordance with Practice G and shall be such that there is no interference with either the exposure or the subsequent testing.
It is intended for use with finished articles of commerce as well as with all sizes and shapes of test specimens. It is intended for use with finished articles of commerce as well as with wstm sizes and shapes of test specimens. This standard is subject to revision at any time d1345 the responsible technical committee and must be reviewed every? If the document is revised or amended, you will be notified by email.
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 – 94 Standard Practice for Outdoor Weathering of Plastics
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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. A number in parentheses indicates the year of last reapproval.
The insulators provide inert mounting while the slotted plate permits free circulation of air behind the specimen.
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ASTM D – 13 – Standard Practice for Outdoor Weathering of Plastics
Several years of repeat exposures are needed to get an average test result for a given location. Note 2 — This standard and ISO The actual yearly values may vary widely from Table 1.
Specimen holders should be used to support the many sizes of specimens involved d14335 this testing. Aluminum extruded shapes have been found to be suitable. This method of mounting is shown in Fig. Note 1 — See Practice G24 for aging under glass. Subscription pricing is determined by: Calculate retention of characteristic property according to Practice D when it is reported.
Preferably, mark both specimen and specimen holder on the side not exposed to weather, as advanced weathering can obscure even deeply scribed marks.
ASTM D1435 – 13
The exposure stages must be regarded as providing only a general indication of the degree of exposure, and the results should always be considered in terms of characteristics of the exposure site as well.
This procedure will vary with materials, but it must be uniform in a series of tests atm one material to provide comparative results.
Historical Version s – view previous versions of standard. 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. 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.
NOTE 4—At-latitude exposure provides maximum annual total solarradiant exposure at most non-subtropical sites.
It is intended for use with? If you feel that your comments r1435 not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. 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.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. Note 2 — This standard and ISO Your Alert Profile lists the documents that will be monitored. The results of tests conducted for d14435 than twelve months will depend on the particular season of the year in which they begin.