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Flange Guide

Dimensions Orifice Weld Neck RTJ flanges ASME B16.36 Class 1500

Weld Neck Orifice flange Raised Face type

Other Pressure Classes

300 -
600 -
900 -
1500 -
NPS DIA
RF
OUT
SIDE
DIA
MIN
THK
FLG
HGT
FLG
HUB
DIA
HUB
DIA
DIA OF
TAB
R O T H X A Tg
1 50.8 150 38.1 83 52 33.5 6.4
1.1/2 73.0 180 38.1 89 70 48.3 6.4
2 92.1 215 38.1 102 105 60.3 6.4
2.1/2 104.8 245 41.3 105 124 73.0 6.4
3 127.0 265 47.7 117 133 88.9 9.5
4 157.2 310 54.0 124 162 114.3 12.7
6 215.9 395 82.6 171 229 168.3 12.7
8 269.9 485 92.1 213 292 219.1 12.7
10 323.8 585 108.0 254 368 273.0 12.7
12 381.0 675 123.9 283 451 323.8 12.7
14 412.8 750 133.4 298 495 355.6 12.7
16 469.9 825 146.1 311 552 406.4 12.7
18 533.4 915 162.0 327 597 457.2 12.7
20 584.2 985 177.8 356 641 508.0 12.7
24 692.2 1170 203.2 406 762 609.6 12.7
Weld Neck Orifice flange
NPS BOLT
CIRCLE
NO OF
BOLTS
DIA OF
HOLES
DIA
STUD
BOLTS
STUD
BOLT
LENGTH
1 101.6 4 1 7/8 150
1.1/2 123.8 4 1.1/8 1 160
2 165.1 8 1 7/8 150
2.1/2 190.5 8 1.1/8 1 165
3 203.2 8 1.1/4 1.1/8 185
4 241.3 8 1.3/8 1.1/4 205
6 317.5 12 1.1/2 1.3/8 265
8 393.7 12 1.3/4 1.5/8 300
10 482.6 12 2 1.7/8 345
12 571.6 16 2.1/8 2 380
14 635.0 16 2 3/8 2.1/4 415
16 704.8 16 2 5/8 2.1/2 450
18 774.7 16 2 7/8 2.3/4 500
20 831.8 16 3.1/8 3 545
24 990.6 16 3.5/8 3.1/2 620

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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