BS 6620-2:1991

This standard BS 6620-2:1991 Industrial plate screens is classified in these ICS categories:

• 19.120 Particle size analysis. Sieving

This part of ISO 7805 describes three patterns using round (circular) and square perforations in plate of less than 3 mm thickness; the sizes of holes range down to 2 mm for square holes and to 0,5 mm for round holes. Five ratios of pitch to hole are specified which result in nominal open areas ranging from about 60 % to 23 %. Tolerances for both hole and pitch are given.

NOTE Industrial plate screens of thicknesses of 3 mm and above are dealt with in ISO 7805-1, Industrial plate screens – Part 1: Thickness of 3 mm and above.

Describes three patterns using round and square perforations in plate of less than 3 mm thickness.