ASTM E728-91 (2020) pdf free

04-13-2021 comment

ASTM E728-91 (2020) pdf free.Standard Test Method for Resistance to Attrition of Granular Carriers and GranularPesticides.
This test method is used to determine the resistance toattrition of granular carriers and granular pesticides.
The values stated in inchpound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.
This standard does not purport to address all of thesafety concerns,if any,associated with its use. It is theresponsibility of the user of this standard to establish appropriate safety,health, and environmental practices and determine the applicability of regulatory limitations prior to use.For specific hazard statements see Section 6.
This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.
Select the limiting screen for the mesh of material to betested.(For 20 to 40 mesh the limiting screen would be 40, for18 to 50 mesh, the limiting screen would be 50, and so forth.)Preclean sieves with brush, then wash and dry the sieves.7.3 Screen out about 75 g of material to be tested using thelimiting screen in the sieve shaker for 10 min or according toproduct specifications (mechanical sieve shaker; use the ham-mer).Transfer 50 l g of material to the pan of the sieveassembly. Put the ten 5/s in. ( 16-mm) steel balls in the pan withthe sample to be tested and place a clean limiting screen inposition above the bottom receiver pan.
Run the shaker for 10 min or according to productspecifications (mechanical sieve shaker; without the hammer).7.7 Remove the assembly from the shaker. Remove the steelballs from the pan.Transfer the material taken from the pan tothe limiting screen. Reassemble the limiting screen and pan.7.8 Place the sieve assembly in the shaker and run for 10min or according to product specifications (mechanical sieveshaker; use the hammer).
Remove the screen assembly from the sieve shaker.Transfer the fraction retained on the screen to a tared beakerand weigh the fraction to the nearest 0.1 g.ASTM E728 pdf download.

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