What hole shapes are covered under this standard?

The standard specifies dimensions and tolerances for both round and square perforations.

What is the recommended hole arrangement for round perforations?

A 60-degree staggered arrangement is standard to maximize open area while maintaining structural integrity.

What materials are typically used to manufacture these sieve plates?

Mild steel, stainless steel, and brass are most common, chosen based on the abrasiveness and corrosiveness of the material being sieved.

How does plate thickness affect the perforations?

The thickness of the plate must be appropriately matched to the aperture size to allow clean punching and maintain rigidity without causing material blockage.

IS 2405

: 2000

Industrial Sieves, Part II: Perforated Plates

CurrentSpecializedSpecificationMaterials Science · Sieves, Sieving and Other Sizing Methods

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This standard specifies the requirements for perforated plates used as industrial sieves. It details the acceptable materials, aperture shapes (round and square), hole arrangement patterns, and manufacturing tolerances necessary for industrial sizing and grading operations.

Industrial Sieves, Part II: Perforated Plates

Quick Reference Values

round hole stagger angle60 degrees

square hole arrangementIn-line (straight) pattern

typical aperture size range1 mm to 125 mm

manufacturing tolerance impactDetermined by nominal aperture size and plate thickness

Practical Notes

Always specify the direction of flow if the holes are punched with a slight taper to avoid blinding during the sieving process.

Round holes arranged in a 60-degree staggered pattern provide the optimum balance between structural strength and maximum open area.

Regularly calibrate and measure sieve hole dimensions, as abrasive materials will gradually increase hole sizes beyond acceptable tolerances over time.