Standard test sieves for ASTM are essential tools for particle size analysis. They are specified in ASTM E11 and ISO 3310-1 standards.
These sieves cover a range of opening sizes from 125mm to 20µm (5.0in to No.635). They use woven-wire mesh as the primary separation medium.
The sieves are classified into three levels of accuracy based on stringent tolerance factors.
5 Key Points Explained: Standard Test Sieves for ASTM
1. Sieve Specifications and Range
ASTM E11 and ISO 3310-1 standards define the specifications for test sieves. These sieves are primarily used for particle size analysis.
They are designed to sieve particles ranging from 150mm (6in) down to 5µm (0.0002in). This is done using appropriate test methods.
Conventional ASTM/ISO test sieves with woven-wire mesh have a specific range of opening sizes. This range is from 125mm to 20µm (5.0in to No.635).
The selection of the appropriate sieve size for a particular sample is determined by industry-standard test methods. Sometimes, it is determined by the operator.
2. Sieve Construction and Materials
The separation medium for most test sieves is either metal or synthetic woven wire mesh. Other mediums include perforated metal plates and electroformed mesh.
Electroformed mesh is a flat metallic sheet with precision openings. The construction of these sieves involves a woven mesh material.
This can lead to variations in the weave. These variations can affect the reproducibility of test results between sieves.
Hence, there is a need for stringent standards to maintain a level of uniformity.
3. Classification and Verification
ASTM E11 and ISO 3310-1 classify test sieves into three different levels of accuracy. The verification process involves a method that precisely measures a selected number of openings in the mesh surface.
This verification is typically done using an automated NIST traceable optical comparator. This device scans the sieve mesh and produces a complete statistical analysis following ASTM/ISO requirements.
4. Certification and Compliance
In some industries, it is mandatory to have test sieves certified or calibrated. This ensures they meet ISO and ASTM specifications.
This process involves running the sieve through a machine that verifies the size of the openings. A document is issued that confirms compliance with the required specifications.
5. Purpose and Acceptance of Sieving
Sieving is a standard method for measuring particle size in various industries. These include construction, chemicals, food, pharmaceuticals, and more.
Although the process assumes each particle to be a perfect sphere, variations in shape are generally accepted. This is due to the long-standing practice and development of specific test methods for different materials.
ASTM's Manual 32 - Test Sieving Methods provides a comprehensive guide for test sieving methods and analysis procedures. This further standardizes the practice across different industries.
Continue exploring, consult our experts
Ready to elevate your particle size analysis with precision and accuracy? KINTEK offers top-of-the-line ASTM test sieves that comply with stringent ASTM E11 and ISO 3310-1 standards.
Our sieves are crafted with high-quality materials and undergo rigorous verification processes. This ensures they meet the highest levels of accuracy.
Whether you're in construction, pharmaceuticals, or any other industry requiring precise particle sizing, KINTEK has the solution for you.
Don't settle for less when it comes to your testing equipment. Trust KINTEK for all your sieve needs and experience the difference in quality and reliability.
Contact us today to learn more about our products and how they can benefit your laboratory!
