ASTM E662-21a
Another revised edition of the standard, ASTM E662-21a, was published soon after the release of ASTM E662-21. The 21a version of the standard was released in June 2021 and replaced the short-lived ASTM E662-21. This new edition made some editorial changes to the way that millimeter measurements are written in the standard (e.g. 6.4-mm changed to 6.4 mm). Its also introduced some new changes to specimen preparation procedures contained in Section 8, Test Specimens.
Section 8.3.2.3 was previously applicable to paints, adhesives or similar finish materials that were intended to be applied over a combustible substrate, but only in situations where there was no known "normal substrate or core." The applicability of this section has changed in the new edition of ASTM E662 and it is now applicable to "veneers that are not rigid or semi-rigid sheet materials." Paints, adhesive and similar finish materials have been removed from this section entirely so the language in Section 8.3.2.3 is no longer applicable to products in those categories.
The requirements for the standard hardboard substrate that is specified in Section 8.3.2.3 were also updated in the 21a version of ASTM E662. The previous hardboard requirements specified a hardboard with a density of 50 to 60 lb/ft³. The new requirements specify that the tempered hardboard instead conforms to ANSI/AHA A135.4 "Basic Hardboard" with no mention of density. The 1/4" thickness of the hardboard remains consistent across both versions of the standard. Note 4 was also added with further details about the new hardboard substrate. The image below shows the changes that were made highlighted in green and the language that was removed highlighted in pink.
Section 8.3.2.4 (above) is applicable to paints, adhesives and similar finish materials without a normal substrate or core. Previously this section was only applicable to paints, adhesive and similar finish materials that were intended to be applied to noncombustible substrate materials. That distinction is no longer included in this section of ASTM E662 so the applicability of this mounting method has been widened to include all paints, adhesive and similar finish materials regardless of whether they are intended to be applied to a combustible or non-combustible substrate. The image above shows the changes that were made highlighted in green and the language that was removed highlighted in pink.
NOTE: The changes to Section 8.3.2.3 and 8.3.2.4 are only applicable to products where there is no normally used substrate or core and these sections are meant to be used for screening purposes only. Products with a known substrate or core should be prepared using the known substrate or core material.
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For questions about the new changes to the ASTM E662 standard or to request a quote for ASTM E662 testing contact Sr. Manager of Product Testing, Chris Palumbo, at 571-300-7050 ext. 2 or ChrisP@CapitalTesting.org.
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