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Flange Guide

Dimensions Orifice Weld Neck RTJ flanges ASME B16.36 Class 900

Weld Neck Orifice flange - Ring Type Joint

Other Pressure Classes

900
NPS OUT
SIDE
DIA
MIN
THK
FLG
HGT
FLG
GRV
NO
PITCH
DIA
GRV
DEPTH
O T H P E
1 125 36.6 81 R16 50.80 6.35
155 36.6 84 R20 68.27 6.35
2 165 36.6 84 R23 82.55 7.92
190 36.6 87 R26 101.60 7.92
3 240 38.1 102 R31 123.83 7.92
4 290 44.5 114 R37 149.23 7.92
6 380 55.6 140 R45 211.12 7.92
8 470 63.5 162 R49 269.88 7.92
10 545 69.9 184 R53 323.85 7.92
12 610 79.4 200 R57 381.00 7.92
14 640 85.8 213 R62 419.10 11.13
16 705 88.9 216 R66 469.90 11.13
18 785 101.6 229 R70 533.40 12.70
20 855 108.0 248 R74 584.20 12.70
24 1040 139.7 292 R78 692.15 15.88
NPS O T H GRV
NO
P E
OUT
SIDE
DIA
MIN
THK
FLG
HGT
FLG
PITCH
DIA
GRV
DEPTH
Weld Neck Orifice flange - Ring Type Joint
NPS GRV
WIDTH
R
BTM
HGT
OVAL
RING
HUB
DIA
HUB
DIA
DIA OF
TAP
F R W X A Tg
1 8.74 0.8 25.4 54 33.5 6.4
8.74 0.8 25.4 70 48.3 6.4
2 11.91 0.8 27.0 84 60.3 6.4
11.91 0.8 27.0 100 73.0 6.4
3 11.91 0.8 27.0 127 88.9 9.5
4 11.91 0.8 27.0 159 114.3 12.7
6 11.91 0.8 27.0 235 168.3 12.7
8 11.91 0.8 27.0 298 219.1 12.7
10 11.91 0.8 27.0 368 273.0 12.7
12 11.91 0.8 27.0 419 323.8 12.7
14 16.66 1.5 33.3 451 355.6 12.7
16 16.66 1.5 36.5 508 406.4 12.7
18 19.84 1.5 39.7 565 457.2 12.7
20 19.84 1.5 39.7 622 508.0 12.7
24 26.97 2.4 47.6 749 609.6 12.7
NPS F R W X A Tg
GRV
WIDTH
R
BTM
HGT
OVAL
RING
HUB
DIA
HUB
DIA
DIA OF
TAP
Weld Neck Orifice flange - Ring Type Joint
NPS BOLT
CIRCLE
NO OF
BOLTS
DIA OF
HOLES
DIA
STUD
BOLTS
STUD
BOLT
L
1 88.9 4 3/4 5/8 140
114.3 4 7/8 3/4 140
2 127.0 8 3/4 5/8 140
149.2 8 7/8 3/4 145
3 190.5 8 1 7/8 165
4 235.0 8 1.1/8 190
6 317.5 12 1.1/8 210
8 393.7 12 13/8 240
10 469.9 16 13/8 255
12 533.4 20 13/8 275
14 558.8 20 1.5/8 290
16 616.0 20 1.5/8 305
18 685.8 20 2 17/8 350
20 749.3 20 2.1/8 2 375
24 901.7 20 25/8 470
NPS BOLT
CIRCLE
NO OF
BOLTS
DIA OF
HOLES
DIA
STUD
BOLTS
STUD
BOLT
L

GENERAL NOTES:

Notes:

Measuring lengths of Stud Bolts and Hex bolts

Tolerances
Tolerances on all dimensions shall be as shown in ASME B16.5 except for those shown below.

Pressure Tap Location
Tolerance on location of center of pressure tap hole from flange face shall be:

Bore Diameter

PP
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