Dimensions Lap Joint Flanges & Stud Bolts ASME B16.5



Lap Joint flange

OTHER DIAMETERS

NPS 20 - ID = 514.3 - r = 13

CLass 150 300 600 900 1500 2500
DIA
A
560 587 610 622 641 ...
DIA
D
700 775 815 855 985 ...
THK
B
42.9 63.5 88.9 108 177.8 ...
DIA
K
635 685.8 723.9 749.3 831.8 ...
H 103 140 165 210 292 ...
NO.
L
20 24 24 20 16 ...
DIA
L
31.8 34.9 44.5 54 79.4 ...
Stud Bolts Diameter x Length
DIA
(in)
1.1/8 1.1/4 1.5/8 2 3 ...
Lenght
(mm)
160 205 285 350 540 ...

Important Information

Notes..

  • Dimensions are in millimeters unless otherwise indicated.
  • The length of the Stud Bolt does not include the height of the chamfers (points).

Dimensional Tolerances of Lap Joint Flanges ASME B16.5
Outside Diameter *
Tolerances not listed in ASME B16.5 2013
≤ 24 = 1.6 mm
> 24 = ± 3.2 mm
Inside Diameter
≤ 10 = ± 0.8 mm
≥ 12 = + 1.6 mm / - 0 mm
Outside Diameter of Hub
≤ 12 = + 2.4 mm / - 1.6 mm
≥ 14 = ± 3.2 mm
Diameter of Counterbore
Same as for Inside Diameter
Drilling
Bolt Circle = 1.6 mm
Bolt Hole Spacing = ± 0.8 mm
Eccentricity of Bolt Circle
≤ 2.1/2 = 0.8 mm max.
≥ 3 = 1.6 mm max.
Thickness
≤ 18 = + 3.2 mm / - 0
≥ 20 = + 4.8 mm / - 0
Length thru Hub
≤ 18 = + 3.2 mm / - 0.8 mm
≥ 20 = + 4.8 mm / - 1.6 mm
Diameter of Contact Face
1.6 mm Raised Face = ± 0.8 mm
6.35 mm Raised Face
Tongue and Groove / Male-Female
± 0.4 mm


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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