Dimensions Orifice Weld Neck RF flanges ASME B16.36 - Class 2500


flanges

 
Class 2500 NPS 1-12

NPSDIA
RF
OUT
SIDE
DIA
MIN
THK
FLG
HGT
FLG
HUB
DIA
HUB
DIA
DIA OF
TAB
ROTHXATg
150.816038.1925733.56.4
73.020544.51117948.36.4
292.123550.81279560.36.4
104.826557.214311473.06.4
3127.030566.716813388.99.5
4157.235576.2190165114.312.7
6215.9485108.0273235168.312.7
8269.9550127.0318305219.112.7
10323.8675165.1419375273.012.7
12381.0760184.2464441323.812.7
NPSROTHXATg
DIA
RF
OUT
SIDE
DIA
MIN
THK
FLG
HGT
FLG
HUB
DIA
HUB
DIA
DIA OF
TAB


NPSBOLT
CIRCLE
NO OF
BOLTS
DIA OF
HOLES
DIA
STUD
BOLTS
STUD
BOLT
LENGTH
1108.0417/8150
146.041.1/8180
2171.481.1/81185
196.881.1/8205
3228.681.3/8230
4273.081.5/8260
6368.382.1/82350
8438.2122.1/82385
10539.8122 5/8490
12619.1122 7/82.3/4540
NPSBOLT
CIRCLE
NO OF
BOLTS
DIA OF
HOLES
DIA
STUD
BOLTS
STUD
BOLT
LENGTH
 

 

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).

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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.