Dimensions Orifice Weld Neck RTJ flanges ASME B16.36 Class 2500


Weld Neck Orifice flange - Ring Type Joint

OTHER PRESSURE CLASSES

600
900
2500
NPS Out
Side
DIA
Min
thk
Flg
Hgt
Flg
Grv
NO
Pitch
DIA
Grv
Depth
O T H P E
1 160 38.1 92 R18 60.33 6.35
1.1/2 205 44.5 111 R23 82.55 7.92
2 235 50.8 127 R26 101.60 7.92
2.1/2 265 57.2 143 R28 111.13 9.53
3 305 66.7 168 R32 127.00 9.53
4 355 76.2 190 R38 157.18 11.13
6 485 108.0 273 R47 228.60 12.70
8 550 127.0 318 R51 279.40 14.27
10 675 165.1 419 R55 342.90 17.48
12 760 184.2 464 R60 406.40 17.48

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 57 33.5 6.4
1.1/2 11.91 0.8 27.0 79 48.3 6.4
2 11.91 0.8 27.0 95 60.3 6.4
2.1/2 13.49 1.5 30.2 114 73.0 6.4
3 13.49 1.5 30.2 133 88.9 9.5
4 16.66 1.5 33.3 165 114.3 12.7
6 19.84 1.5 36.5 235 168.3 12.7
8 23.01 1.5 39.7 305 219.1 12.7
10 30.18 2.4 47.6 375 273.0 12.7
12 33.32 2.4 50.8 441 323.8 12.7

Weld Neck Orifice flange - Ring Type Joint
NPS Bolt
Circle
NO of
Bolts
DIA of
Holes
DIA
Stud
Bolts
Stud
Bolt
L
1 108.0 4 1 7/8 160
1.1/2 146.0 4 1.1/4 1.1/8 190
2 171.4 8 1.1/8 1 195
2.1/2 196.8 8 1.1/4 1.1/8 215
3 228.6 8 1.3/8 1.1/4 240
4 273.0 8 1.5/8 1.1/2 275
6 368.3 8 2.1/8 2 370
8 438.2 12 2.1/8 2 405
10 539.8 12 2 5/8 2.1/2 515
12 619.1 12 2 7/8 2.3/4 570

General Notes..

  • Dimensions are in millimeters, except for bolts and bolt holes.
  • All other dimensions are in accordance with ASME B16.5.
  • Ring joint flanges larger than NPS 3 will require angular meter taps.

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. Bolt lengths for ring-type joint flanges include
    allowance of 15 mm (0.62 in.) for NPS 1 to NPS 3.
  • 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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