Knowledge What are the Standard Sieve Sizes Used in the Food Industry? 5 Key Points to Know
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Tech Team · Kintek Solution

Updated 1 month ago

What are the Standard Sieve Sizes Used in the Food Industry? 5 Key Points to Know

In the food industry, standard sieve sizes are crucial for ensuring that ingredients are of the appropriate size. These sieves typically range from 125mm to 20μm, with special sieves available for even finer measurements down to 5μm.

5 Key Points to Know About Standard Sieve Sizes in the Food Industry

What are the Standard Sieve Sizes Used in the Food Industry? 5 Key Points to Know

1. Standard Test Sieves Range

Standard test sieves used in the food industry can measure solid particle sizes from 125mm down to 20μm. This range is essential for ensuring that food ingredients like powders, grains, and other particulates are uniform in size. This uniformity can affect the texture, consistency, and overall quality of the final product.

2. Special Sieves for Finer Particles

For very fine particles, special sieves with apertures less than 20μm are used. These sieves are designed to handle the challenge of fine particles potentially blocking the apertures. An example of such a sieve is the electromagnetic standard test sieve, which can perform "micro" sieving up to 5μm. This is particularly important in the food industry where ingredients like starches or powdered sugars need to be extremely fine.

3. Mesh and Frame Details

The mesh, often made of stainless steel woven wire, comes in various opening sizes ranging from 4” (100mm) to 635 mesh (20μm). The frames that hold these meshes are typically round metal circles and come in standard sizes such as 3-inch, 8-inch, and 12-inch in the U.S., or 100mm, 200mm, and 300mm internationally. These frames can be made of stainless steel or brass, ensuring durability and precision in sieving.

4. Industry Standards and Usage

The specific mesh size, number of test sieves needed, sample size, use of a sieve shaker, duration of sieving, and calibration requirements are dictated by industry standards. For instance, a sample size of 25–100 g is generally recommended for sieve analysis in food applications to ensure accuracy without overwhelming the sieve.

5. International Standards

It's important to note that while ASTM standards in the U.S. measure sieve diameters in inches and use mesh numbers, ISO/BS standards internationally use millimeters and wire spacing. This can lead to slight differences in actual sieve sizes and mesh definitions, which need to be considered when dealing with international food ingredient standards or suppliers.

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