The ASTM standard for sieving is ASTM E11.
This standard provides specifications for the design and performance of test sieves.
It covers the materials, construction, and accuracy requirements for woven wire sieves.
This ensures their reliability and consistency in particle size analysis.
5 Key Points Explained
1. Scope of ASTM E11
ASTM E11 standard is specifically designed to outline the requirements for the manufacture and testing of wire cloth and test sieves.
It includes detailed specifications for the materials used, such as metal or synthetic woven wire mesh.
The standard also covers the dimensions of the sieve openings.
This ensures that sieves are constructed to a high degree of precision, which is crucial for accurate particle size analysis.
2. Accuracy and Verification
The standard emphasizes the importance of accuracy in sieve analysis.
It includes methods for verifying the performance of sieves using standard reference materials (SRMs) as outlined in ASTM E2427.
These methods involve comparing the performance of a working sieve against a calibration grade reference sieve using SRMs, which are glass beads with known sizes.
This comparison helps in determining the accuracy of the working sieve and when it should be replaced due to wear.
3. Comparison with International Standards
ASTM E11 also addresses the differences in sieve specifications between ASTM standards and international standards like ISO/BS.
For instance, while ASTM standards measure sieve diameters in inches, ISO/BS standards use millimeters.
Additionally, ASTM uses mesh numbers to describe the sieve openings, which represent the number of wires per inch, whereas ISO/BS standards tend to use wire spacing.
4. Application Range
According to ASTM E11, sieves can effectively analyze particles ranging from 150mm (6in) to 5µm (0.0002in).
This wide range allows for the analysis of various materials across different industries, including construction, chemicals, food, pharmaceuticals, and more.
5. Selection and Use of Sieves
The standard also guides the selection of the appropriate sieve type and size for specific applications.
It suggests that the choice of sieve should be based on the industry-standard test methods or the specific requirements of the sample being tested.
This ensures that the sieve is not only accurate but also suitable for the material being analyzed.
In summary, ASTM E11 is a comprehensive standard that ensures the quality, accuracy, and reliability of test sieves used in particle size analysis.
It provides detailed specifications and methods for sieve construction, verification, and use.
This makes it an essential reference for laboratories and industries that rely on sieving as a standard method for particle size measurement.
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