ASTM standard sieves are test sieves that meet the specifications set by the American Society for Testing Materials (ASTM).
These sieves are used in laboratories for measuring particle size and for classifying and determining the particle size of powders, bulk particles, and suspensions.
A standard test sieve is typically made of woven wire mesh with square holes.
The size of the sieve openings can vary depending on the specific test being conducted.
The sieve designation, microns, and nominal openings in both millimeters and inches are usually indicated on the sieve's nameplate.
Understanding ASTM Standard Sieves: 5 Key Points You Need to Know
1. Classification and Accuracy Standards
The ASTM E11 and ISO 3310-1 standards outline the classification of test sieves into different levels of accuracy.
Verification of sieves is performed using a method that involves measuring a selected number of openings in the mesh surface and calculating the probability of their size ranges using statistical methods.
This process ensures that the sieves meet the required accuracy standards.
2. Performance Accuracy Check
To ensure the accuracy of test sieves, ASTM E2427 provides methods for checking the performance accuracy of working sieves.
This involves using standard reference materials (SRMs) or user-prepared reference samples.
SRMs are carefully measured glass beads that serve as a reference for determining the accuracy of the working sieve.
By passing the reference materials over the working sieve and an equivalent inspection or calibration grade reference sieve, the accuracy of the working sieve can be calculated.
3. Purpose of Test Sieves
The purpose of test sieves is to analyze and measure the particle size of materials.
Sieving has been used for a long time and is considered a standard method for particle size measurement.
While sieving assumes each particle to be a perfect sphere, it has been widely accepted in various industries such as construction, chemicals, food, pharmaceuticals, and more.
Different disciplines have developed their own published test methods for sieving, and ASTM has also published its own comprehensive guide called Manual 32 - Test Sieving Methods, which provides analysis procedures and methods for test sieving.
4. Specifications for Woven Wire Sieves
ASTM E11 and ISO 3310-1 standards specify the specifications for woven wire sieves, which can effectively sieve particles ranging from 150mm (6in) to 5µm (0.0002in) using appropriate test methods.
5. Finding Reliable ASTM Standard Sieves
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We provide high-quality test sieves that meet ASTM specifications, ensuring accurate particle size determination.
Our sieves come in various shapes and sizes, with a woven wire mesh design for precise classification.
Plus, each sieve is supplied with a certificate of analysis for added assurance.
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