The ASTM standard sieves are a set of standardized testing sieves used for particle size analysis across various industries. These sieves are defined and classified by ASTM E11 and ISO 3310-1 standards, which outline methods for their verification and accuracy.
Summary of ASTM Standard Sieves: ASTM standard sieves are used for particle size analysis and are classified into three levels of accuracy based on ASTM E11 and ISO 3310-1 standards. These sieves are crucial for industries dealing with materials like chemicals, pharmaceuticals, construction materials, and more.
Detailed Explanation:
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Classification and Verification:
- ASTM E11 and ISO 3310-1 provide detailed methods for classifying test sieves into three different levels of accuracy. This classification helps in ensuring that the sieves are suitable for specific applications requiring different levels of precision.
- Verification of sieves involves a precise method where a selected number of openings in the mesh surface are measured. This is done using an automated NIST traceable optical comparator, which scans the sieve mesh and produces a statistical analysis of the aperture sizes. This ensures that the sieves meet the required standards for accuracy and precision.
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Uses and Applications:
- Standard test sieves are used across various industries for particle analysis. The particles can range from very fine (as in the food or pharmaceutical industry) to larger particles (in agriculture and mining).
- These sieves can measure solid particle sizes from 125mm to 20μm. For finer particles, special sieves with apertures less than 20μm are used, including electromagnetic standard test sieves capable of sieving down to 5μm.
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Quality and Standards:
- The quality of ASTM standard sieves is crucial, and they are often constructed from durable materials like 300 series stainless steel. This ensures their longevity and high-quality functionality.
- Sieves are designed to maximize the accuracy of tests by reducing inefficient or contaminant-inducing features, ensuring cleaner and more reliable results.
In conclusion, ASTM standard sieves are essential tools for particle size analysis, adhering to strict standards and verification processes to ensure accuracy and reliability in various industrial applications.
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