Dimensions Orifice Weld Neck RF flanges ASME B16.36 Class 300

Weld Neck Orifice flange

OTHER PRESSURE CLASSES

300
600
900
NPS HUB
DIA
DIA
RF
OUT
SIDE
DIA
MIN
THK
FLG
HGT
FLG
HUB
DIA
DIA OF
TAB
A R O T H X Tg
1 33.4 50.8 125 36.6 81 54 6.4
1.1/2 48.3 73.0 155 36.6 84 70 6.4
2 60.3 92.1 165 36.6 84 84 6.4
2.1/2 73.0 104.8 190 36.6 87 100 6.4
3 88.9 127.0 210 36.6 87 117 9.5
4 114.3 157.2 255 36.6 90 146 12.7
6 168.3 215.9 320 36.6 98 206 12.7
8 219.1 269.9 380 39.7 110 260 12.7
10 273.0 323.8 445 46.1 116 321 12.7
12 323.8 381.0 520 49.3 129 375 12.7
14 355.6 412.8 585 52.4 141 425 12.7
16 406.4 469.9 650 55.6 144 483 12.7
18 457.0 533.4 710 58.8 157 533 12.7
20 508.0 584.2 775 62.0 160 587 12.7
24 610.0 692.2 915 68.3 167 702 12.7

Weld Neck Orifice flange
NPS BOLT
CIRCLE
NO OF
BOLTS
DIA OF
HOLES
DIA
STUD
BOLTS
STUD
BOLT
LENGTH
1 88.9 4 11/16 5/8 125
1.1/2 114.3 4 13/16 3/4 135
2 127.0 8 11/16 5/8 125
2.1/2 149.2 8 13/16 3/4 135
3 168.3 8 13/16 3/4 135
4 200.0 8 13/16 3/4 135
6 269.9 12 7/8 3/4 135
8 330.2 12 1 7/8 145
10 387.4 16 1.1/8 1 165
12 450.8 16 1.1/4 1.1/8 180
14 514.4 20 1.1/4 1.1/8 185
16 571.5 20 1.3/8 1.1/4 195
18 628.6 24 1.3/8 1.1/4 205
20 685.8 24 1.3/8 1.1/4 215
24 812.8 24 1.5/8 1.1/2 240

General Notes..

  • Dimensions are in millimeters, except for bolts and bolt holes.
  • Height of Raised Face (RF) in CLASS 300 is 2 mm.
  • 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).
  • The length of the Stud Bolts includes one Spiral Wound Gasket with a 4.5mm thick sealing element, which is compressed to 3mm while tightening the Raised Face flange connection.

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




Explore the World of Piping


© Werner Sölken 2008 -  
All rights reserved.
www.wermac.org uses Google Analytics

Privacy Policy

I must be old. I still believe in respect.