What aperture shapes does this standard cover?

The standard covers both square and round apertures for perforated plates.

When should I use a perforated plate sieve instead of a wire cloth sieve?

Perforated plate sieves are typically used for coarse grading (usually 4.00 mm and above) where larger, heavier particles might deform a woven wire cloth mesh.

How are these sieves properly designated?

They are designated by the nominal size of the aperture, the shape of the aperture (square or round), and a reference to the IS 460 standard.

IS 460

: 2000

Test Sieves: Part-II Perforated Plate Test Sieves

CurrentFrequently UsedSpecificationMaterials Science · Sieves, Sieving and Other Sizing Methods

Download PDF BIS Portal Google

This standard specifies the technical requirements, dimensions, and tolerances for perforated plate test sieves. Quality control engineers and laboratory technicians use it to ensure accurate grading and particle size distribution analysis of coarse granular materials like aggregates, gravel, and large soil particles.

Test Sieves: Part-II Perforated Plate Test Sieves

Quick Reference Values

aperture shapesSquare or Round

common frame diameters200 mm, 300 mm, 450 mm

typical application sizeTypically > 4.00 mm (coarse materials)

Practical Notes

Perforated plate sieves are preferred over wire cloth sieves for larger aperture sizes because they are more robust and less prone to distortion.

Regularly calibrate and verify the aperture dimensions using IS 460 (Part 3) to ensure they haven't worn out from the abrasive action of heavy aggregates.

Always ensure the sieve frame fits snugly with the receiver pan and lid to prevent material loss during mechanical shaking.