Dimensions Lap Joint Flanges & Stud Bolts ASME B16.5

Lap Joint flange

Important Information

NPS 1/2 - ID = 22.9 - r = 3
CLass 150 300 600 900 1500 2500
DIA
A		 30 38 38 38 38 43
DIA
D		 90 95 95 120 120 135
THK
B		 11.2 14.3 14.3 22.3 22.3 30.2
DIA
K		 60.3 66.7 66.7 82.6 82.6 88.9
H 16 22 22 32 32 40
NO.
L		 4 4 4 4 4 4
DIA
L		 15.9 15.9 15.9 22.2 22.2 22.2
Stud Bolts Diameter x Length
DIA
(in)		 1/2 1/2 1/2 3/4 3/4 3/4
Len
mm		 55 65 75 110 110 120
Other Diameters
NPS 1/2 3/4 1 1.1/4 1.1/2 2 2.1/2
3 3.1/2 4 6 8 10 12
14 16 18 20 24    
 

Notes:

Measuring lengths of Stud Bolts and Hex Bolts
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

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