Dimensions Orifice Weld Neck RTJ flanges ASME B16.36 Class 600


Weld Neck Orifice flange - Ring Type Joint

OTHER PRESSURE CLASSES

600
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
1.1/2 155 36.6 84 R20 68.27 6.35
2 165 36.6 84 R23 82.55 7.92
2.1/2 190 36.6 87 R26 101.60 7.92
3 210 36.6 87 R31 123.83 7.92
4 275 38.1 102 R37 149.23 7.92
6 355 47.7 117 R45 211.12 7.92
8 420 55.6 133 R49 269.88 7.92
10 510 63.5 152 R53 323.85 7.92
12 560 66.7 156 R57 381.00 7.92
14 605 69.9 165 R61 419.10 7.92
16 685 76.2 178 R65 469.90 7.92
18 745 82.6 184 R69 533.40 7.92
20 815 88.9 190 R73 584.20 9.53
24 940 101.6 203 R77 692.15 11.13

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
1.1/2 8.74 0.8 25.4 70 48.3 6.4
2 11.91 0.8 27.0 84 60.3 6.4
2.1/2 11.91 0.8 27.0 100 73.0 6.4
3 11.91 0.8 27.0 117 88.9 9.5
4 11.91 0.8 27.0 152 114.3 12.7
6 11.91 0.8 27.0 222 168.3 12.7
8 11.91 0.8 27.0 273 219.1 12.7
10 11.91 0.8 27.0 343 273.0 12.7
12 11.91 0.8 27.0 400 323.8 12.7
14 11.91 0.8 27.0 432 355.6 12.7
16 11.91 0.8 30.2 495 406.4 12.7
18 11.91 0.8 30.2 546 457.2 12.7
20 13.49 1.5 31.8 610 508.0 12.7
24 16.66 1.5 36.5 718 609.6 12.7

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
1.1/2 114.3 4 7/8 3/4 140
2 127.0 8 3/4 5/8 140
2.1/2 149.2 8 7/8 3/4 145
3 168.3 8 7/8 3/4 145
4 215.9 8 1 7/8 165
6 292.1 12 1.1/8 1 190
8 349.2 12 1.1/4 1.1/8 210
10 431.8 16 1.3/8 1.1/4 235
12 489.0 20 1.3/8 1.1/4 240
14 527.0 20 1.1/2 1.3/8 255
16 603.2 20 1.5/8 1.1/2 275
18 654.0 20 1.3/4 1.5/8 290
20 723.9 24 1.3/4 1.5/8 320
24 838.2 24 2 1.7/8 350

General Notes..

  • Dimensions are in millimeters, except for bolts and bolt holes.
  • Weld neck flanges NPS 3 and smaller are identical to Class 300 flanges except
    for bolting and may be used for such service.
  • All other dimensions are in accordance with ASME B16.5.
  • Ring joint flange in NPS 24 will require an angular meter tap.

Notes..

  • Other NPT sizes may be furnished if required.
  • Bolt lengths for raised face flanges include allowance for orifice and gasket thickness
    of 6 mm (0.25 in.) for NPS 1 to NPS 12 and 10 mm (0.38 in.) for NPS 14 to NPS 24.
    Bolt lengths for ring-type joint flanges include allowance of 15 mm (0.62 in.) for NPS 1 to NPS 10,
    19 mm (0.75 in.) for NPS 12 to NPS 18, and 22 mm (0.88 in.) for NPS 20.
  • Bore (B) is to be specified by the purchaser.
  • The length of the Stud Bolt does not include the height of the chamfers (points).

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..

  • ±0.5 mm (±0.02 in.) for flanges smaller than NPS 4
  • ±0.8 mm (±0.03 in.) for flanges NPS 4 and larger

Bore Diameter

  • Bore diameter tolerance (Welding Neck flanges only) is ±0.5% of nominal value.


Studs are measured parallel to the axis (L) from the first to the thread without the chamfers (points). S = free threads equals 1/3 time bolt dia

Measuring lengths of Stud Bolts


Hex bolts are measured from under the head to the top of de bolt


Measuring lengths of Hex bolts




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