Drilling Dimension

Description of Different Drilling-Dimension

Different Drilling Standards for 150# Flanges
Size NB Description BS 10
T-'H' & 'J'		 BS 10
T-'D'		 BS 10
T-'E'		 BS 10
T-'F'		 B-16.5
& ASA150
1/2"
15 mm		 Thickness 15 15 15 15 15
OD 95 95 95 95 95
PCD 83 67 67 67 60
Hole Dia/ No of Holes 18/4 14/4 14/4 14/4 15/4
3/4"
20 mm		 Thickness 17 17 17 17 17
OD 100 100 100 100 100
PCD 83 73 73 73 70
Hole Dia/ No of Holes 18/4 14/4 14/4 14/4 15/4
1"
25 mm		 Thickness 19 19 19 19 19
OD 120 120 120 120 120
PCD 87 83 83 87 80
Hole Dia/ No of Holes 18/4 14/4 14/4 18/4 15/4
1.1/4"
32 mm		 Thickness 19 19 19 19 19
OD 140 140 140 140 140
PCD 98 87 87 98 89
Hole Dia/ No of Holes 18/4 14/4 14/4 18/4 15/4
1.1/2"
40 mm		 Thickness 19 19 19 19 19
OD 140 140 140 140 140
PCD 105 98 98 105 98
Hole Dia/ No of Holes 18/4 14/4 14/4 18/4 15/4
2"
50 mm		 Thickness 21 21 21 21 21
OD 165 152 152 165 165
PCD 127 114 114 127 121
Hole Dia/ No of Holes 18/4 18/4 18/4 18/4 19/4
2.1/2"
65 mm		 Thickness 26 26 26 26 26
OD 185 165 165 185 185
PCD 146 127 127 146 140
Hole Dia/ No of Holes 18/8 18/4 18/4 18/8 19/4
3"
80 mm		 Thickness 26 26 26 26 26
OD 200 184 184 200 200
PCD 165 146 146 165 152
Hole Dia/ No of Holes 18/8 18/4 18/4 18/8 19/4
4"
100 mm		 Thickness 27 27 27 27 27
OD 230 216 216 230 230
PCD 191 178 178 190 190
Hole Dia/ No of Holes 18/8 18/4 18/8 18/8 19/8
6"
150 mm		 Thickness 36 36 36 36 36
OD 305 279 279 205 305
PCD 260 235 235 260 241
Hole Dia/ No of Holes 22/12 18/8 18/8 22/12 22/8
Top