Dimensions Weld Neck Flanges & Stud Bolts ASME B16.5


flanges

 
NPS 1/2 - O.D. 21.3

Important Information


CL 150 300 600 900 1500 2500
DIA
A
30 38 38 38 38 43
DIA
D
90 95 95 120 120 135
THK
B
9.6 12.7 14.3 22.3 22.3 30.2
11.2 14.3 20.7 28.7 28.7 36.6
DIA
G
35.1 35.1 35.1 35.1 35.1 35.1
DIA
K
60.3 66.7 66.7 82.6 82.6 88.9
H 46 51 52 60 60 73
47.6 52.6 58.4 66.4 66.4 79.4
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 3/4 1 2
3 4 5 6 8 10
12 14 16 18 20 24  
 

 

Notes:

  • Dimensions are in millimeters unless otherwise indicated.
  • The length of the Stud Bolt does not include the height of the chamfers (points).
  • ID = Depending on the wall thickness of the pipe, must be specified by the purchaser.

images

 

DIMENSIONAL TOLERANCES OF WELD NECK FLANGES ASME B16.5


Outside Diameter (Note 1)
≤24
1.6 mm (0.06 in)
>24
∓3.2 mm (∓0.12 in)
Diameter Hub at Base
≤24
1.6 mm (0.06 in)
>24
∓3.2 mm (∓0.12 in)
Inside Diameter
≤10
∓0.8 mm (∓0.03 in)
12 thru 18
1.6 mm (0.06 in)
≥20
+3.2 mm / -1.6 mm
(∓0.12 in / -0.06 in)
Diameter Hub at Point of Welding
≤5
+2.4 mm / -0.8 mm
(∓0.09 in / -0.03 in)
≥6
+4.0 mm / -0.8 mm
(+0.15 in / -0.03 in)
Drilling
Bolt Circle
1.6 mm (0.06 in)
Bolt Hole Spacing
∓0.8 mm (∓0.03 in)
Eccentricity Bolt Circle
≤2½
0.8 mm max (0.03 in max)
≥3
1.6 mm max (0.06 in max)

Thickness
≤18
+3.2 mm / -0 (+0.12 in / -0)
≥20
+4.8 mm / -0 (+0.18 in / -0)
Length thru Hub
≤10
1.6 mm (0.06 in)
≥12
∓3.2 mm (∓0.12 in)
Diameter Contact Face
1.6 mm RF (0.06 in)
∓0.8 mm (∓0.03 in)
6.35 mm RF (0.25 in)
∓0.4 mm (∓0.01 in)

Tongue & Groove
∓0.4 mm (∓0.01 in)
Male-Female
∓0.4 mm (∓0.01 in)


1 mm (0.03 in)
2 mm (0.07 in)
6 mm (0.23 in)

(NOTE 1) Tolerances not listed in ASME B16.5-2013