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


flanges

 
Class 300 NPS 1-24

NPSHUB
DIA
DIA
RF
OUT
SIDE
DIA
MIN
THK
FLG
HGT
FLG
HUB
DIA
DIA OF
TAB
AROTHXTg
133.450.812536.681546.4
48.373.015536.684706.4
260.392.116536.684846.4
73.0104.819036.6871006.4
388.9127.021036.6871179.5
4114.3157.225536.69014612.7
6168.3215.932036.69820612.7
8219.1269.938039.711026012.7
10273.0323.844546.111632112.7
12323.8381.052049.312937512.7
14355.6412.858552.414142512.7
16406.4469.965055.614448312.7
18457.0533.471058.815753312.7
20508.0584.277562.016058712.7
24610.0692.291568.316770212.7
NPSAROTHXTg
HUB
DIA
DIA
RF
OUT
SIDE
DIA
MIN
THK
FLG
HGT
FLG
HUB
DIA
DIA OF
TAB


NPSBOLT
CIRCLE
NO OF
BOLTS
DIA OF
HOLES
DIA
STUD
BOLTS
STUD
BOLT
LENGTH
188.9411/165/8125
114.3413/163/4135
2127.0811/165/8125
149.2813/163/4135
3168.3813/163/4135
4200.0813/163/4135
6269.9127/83/4135
8330.21217/8145
10387.4161.1/81165
12450.8161.1/8180
14514.4201.1/8185
16571.5201.3/8195
18628.6241.3/8205
20685.8241.3/8215
24812.8241.5/8240
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.