Perforated Plate Nominal Sizes of Openings – R10, R20, R40

Industrial perforated plate screens – designation and nominal sizes of openings. Specifies the designation and nominal sizes of openings for perforated plate used as screening media for industrial purposes.

Perforated plate shall be designated by following:

Material of the plate.
Nominal thickness.
Shape of the holes (square, circular, hexagonal, slot or any other regular geometric shape).
Nominal size of the holes w (central separation of opposite sides or diameter).
Pitch.
Arrangement (U, T, M or Z arrangements).
Orientation of the arrangement (orientation 1, or orientation 2).

More information please see designation perforations in industrial plate screens.

Nomlnal sizes of industrial perforated plate screens openings

Three series of nominal sizes of openings are specified (see tables 1 and 2).
The R 10 sizes shall be chosen by preference; otherwise the R 20 sizes and R 40 sizes may be chosen.

Table 1 - Nominal Sizes of Industrial Screens Openings - Millimetre Sizes
Principal Sizes	Supplementary Sizes
R10	R20	R40
125	125	125
100	112	118
	112	112
	100	106
	100	100
80	90	95
	90	90
	80	85
	80	80
63	71	75
	71	71
	63	67
	63	63
50	56	60
	56	56
	50	53
	50	50
40	45	47.5
	45	45
	40	42.5
	40	40
31.5	35.5	37.5
	35.5	35.5
	31.5	33.5
	31.5	31.5
25	28	30
	28	28
	25	26.5
	25	25
20	22.4	23.6
	22.4	22.4
	20	21.2
	20	20
16	18	19
	18	18
	16	17
	16	16
12.5	14	15
	14	14
	12.5	13.2
	12.5	12.5
10	11.2	11.8
	11.2	11.2
	10	10.6
	10	10
8	9	9.5
	9	9
	8	8.5
	8	8
6.3	7.1	7.5
	7.1	7.1
	6.3	6.7
	6.3	6.3
5	5.6	6
	5.6	5.6
	5	5.3
	5	5
4	4.5	4.75
	4.5	4.5
	4	4.25
	4	4
3.15	3.55	3.75
	3.55	3.55
	3.15	3.35
	3.15	3.15
2.5	2.8	3
	2.8	2.8
	2.5	2.65
	2.5	2.5
2	2.24	2.36
	2.24	2.24
	2	2.12
	2	2
1.6	1.8	1.9
	1.8	1.8
	1.6	1.7
	1.6	1.6
1.25	1.4	1.5
	1.4	1.4
	1.25	1.32
	1.25	1.25
1	1.12	1.18
	1.12	1.12
	1	1.06
	1	1

Table 2 - Nominal Sizes of Industrial Screens Openings - Micrometre Sizes
Principal Sizes	Supplementary Sizes
R10	R20	R40
800	900	950
	900	900
	800	850
	800	800
630	710	750
	710	710
	630	670
	630	630
500	560	600
	560	560
	500	530
	500	500
400	450	475
	450	450
	400	425
	400	400
315	355	375
	355	355
	315	335
	315	315
250	280	300
	280	280
	250	265
	250	250
200	224	236
	224	224
	200	212
	200	200
160	180	190
	180	180
	160	170
	160	160
125	140	150
	140	140
	125	132
	125	125
100	112	118
	112	112
	100	106
	100	100
80	90	95
	90	90
	80	85
	80	80
63	71	75
	71	71
	63	67
	63	63
50	56	60
	56	56
	50	53
	50	50
40	45	48
	45	45
	40	42
	40	40
32	36	28
	36	36
	32	34
	32	32
25	25
20	20
16
10
5

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Principal Sizes	Supplementary Sizes
R10	R20	R40
800	900	950
	900	900
	800	850
	800	800
630	710	750
	710	710
	630	670
	630	630
500	560	600
	560	560
	500	530
	500	500
400	450	475
	450	450
	400	425
	400	400
315	355	375
	355	355
	315	335
	315	315
250	280	300
	280	280
	250	265
	250	250
200	224	236
	224	224
	200	212
	200	200
160	180	190
	180	180
	160	170
	160	160
125	140	150
	140	140
	125	132
	125	125
100	112	118
	112	112
	100	106
	100	100
80	90	95
	90	90
	80	85
	80	80
63	71	75
	71	71
	63	67
	63	63
50	56	60
	56	56
	50	53
	50	50
40	45	48
	45	45
	40	42
	40	40
32	36	28
	36	36
	32	34
	32	32
25	25
20	20
16
10
5

Principal Sizes	Supplementary Sizes
R10	R20	R40
800	900	950
	900	900
	800	850
	800	800
630	710	750
	710	710
	630	670
	630	630
500	560	600
	560	560
	500	530
	500	500
400	450	475
	450	450
	400	425
	400	400
315	355	375
	355	355
	315	335
	315	315
250	280	300
	280	280
	250	265
	250	250
200	224	236
	224	224
	200	212
	200	200
160	180	190
	180	180
	160	170
	160	160
125	140	150
	140	140
	125	132
	125	125
100	112	118
	112	112
	100	106
	100	100
80	90	95
	90	90
	80	85
	80	80
63	71	75
	71	71
	63	67
	63	63
50	56	60
	56	56
	50	53
	50	50
40	45	48
	45	45
	40	42
	40	40
32	36	28
	36	36
	32	34
	32	32
25	25
20	20
16
10
5

Principal Sizes	Supplementary Sizes
R10	R20	R40
800	900	950
	900	900
	800	850
	800	800
630	710	750
	710	710
	630	670
	630	630
500	560	600
	560	560
	500	530
	500	500
400	450	475
	450	450
	400	425
	400	400
315	355	375
	355	355
	315	335
	315	315
250	280	300
	280	280
	250	265
	250	250
200	224	236
	224	224
	200	212
	200	200
160	180	190
	180	180
	160	170
	160	160
125	140	150
	140	140
	125	132
	125	125
100	112	118
	112	112
	100	106
	100	100
80	90	95
	90	90
	80	85
	80	80
63	71	75
	71	71
	63	67
	63	63
50	56	60
	56	56
	50	53
	50	50
40	45	48
	45	45
	40	42
	40	40
32	36	28
	36	36
	32	34
	32	32
25	25
20	20
16
10
5