AS 4087:2004 PN 21
PN21
FLANGE THICKNESS
DRILLING DATA
PN21
NOMINAL PIPE SIZE
FLANGE OUTSIDE DIAMETER
THICKNESS OF FLANGE
PITCH CIRCLE DIAMETER
BOLT HOLE DIAMETER
NUMBER OF BOLT HOLES
NOMINAL PIPE SIZE
MM
INCH
OD
T
PCD
H
#
MM
INCH
50
2
165
15
127
18
4
50
2
65
2 1/2
185
15
146
18
8
65
2 1/2
80
3
205
15
165
18
8
80
3
100
4
230
19
191
18
8
100
4
150
6
305
24
260
22
12
150
6
200
8
370
24
324
22
12
200
8
225
9
405
30
356
26
12
225
9
250
10
430
30
381
26
12
250
10
300
12
490
30
438
26
16
300
12
350
14
550
30
495
30
16
350
14
375
15
580
38
521
30
16
375
15
400
16
610
38
552
30
20
400
16
450
18
675
38
610
33
20
450
18
500
20
735
48
673
33
24
500
20
600
24
850
58
781
36
24
600
24
700
28
935
58
857
36
24
700
28
750
30
1015
58
940
36
28
750
30
800
32
1060
68
984
36
28
800
32
900
36
1185
68
1105
39
32
900
36
1000
40
1275
78
1194
39
36
1000
40
1200
48
1530
88
1441
42
40
1200
48
Notes:
(1)Flat face and Raised face or “O” ring groove also available.
(2) For special design, pls make an enquiry here.
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