Dimensions in Inches Weld Neck Flanges and Stud Bolts ASME B16.5 Class 600



Weld Neck flange

OTHER PRESSURE CLASSES

150
300
400
600
900
NPS Dia
D
THK
B
Dia
A
Dia
OD
Height
H
Dia
K
Dia
L
1/2 3.75 0.56 1.5 0.84 2.06 2.62 5/8
3/4 4.62 0.62 1.88 1.05 2.25 3.25 3/4
1 4.88 0.69 2.12 1.32 2.44 3.5 3/4
1.1/4 5.25 0.81 2.5 1.66 2.62 3.88 3/4
1.1/2 6.12 0.88 2.75 1.9 2.75 4.5 7/8
2 6.5 1 3.31 2.38 2.88 5 3/4
2.1/2 7.5 1.12 3.94 2.88 3.12 5.88 7/8
3 8.25 1.25 4.62 3.5 3.25 6.62 7/8
3.1/2 9 1.38 5.25 4 3.38 7.25 1
4 10.75 1.5 6 4.5 4 8.5 1
5 13 1.75 7.44 5.56 4.5 10.5 1.1/8
6 14 1.88 8.75 6.63 4.62 11.5 1.1/8
8 16.5 2.19 10.75 8.63 5.25 13.75 1.1/4
10 20 2.5 13.5 10.75 6 17 1.3/8
12 22 2.62 15.75 12.75 6.12 19.25 1.3/8
14 23.75 2.75 17 14 6.5 20.75 1.1/2
16 27 3 19.5 16 7 23.75 1.5/8
18 29.25 3.25 21.5 18 7.25 25.75 1.3/4
20 32 3.5 24 20 7.5 28.5 1.3/4
24 37 4 28.25 24 8 33 2

Important Information



Stud Bolts for the flanges above

NPS No of
Bolt
Holes
Dia
Stud
Bolts
Length
Stud
Bolts
1/2 4 1/2 3
3/4 4 5/8 3.5
1 4 5/8 3.5
1.1/4 4 5/8 3.75
1.1/2 4 3/4 4.25
2 8 5/8 4.25
2.1/2 8 3/4 4.75
3 8 3/4 5
3.1/2 8 7/8 5.5
4 8 7/8 5.75
5 8 1 6.5
6 12 1 6.75
8 12 1.1/8 7.5
10 16 1.1/4 8.5
12 20 1.1/4 8.75
14 20 1.3/8 9.25
16 20 1.1/2 10
18 20 1.5/8 10.75
20 24 1.5/8 11.25
24 24 1.7/8 13

Notes..


Dimensional Tolerances
Weld Neck Flanges ASME B16.5

Welding bevel

Outside Diameter *
Tolerances not listed in ASME B16.5 2013
≤24
0.06 in (1.6 mm)
>24
±0.12 in (±3.2 mm)
Diameter Hub at Base
≤24
0.06 in (1.6 mm)
>24
±0.12 in (±3.2 mm)
Inside Diameter
≤10
±0.03 in (±0.8 mm)
12 thru 18
0.06 in (1.6 mm)
≥20
±0.12 in / -0.06 in
(+3.2 mm / -1.6 mm)
Diameter Hub at Point of Welding
≤5
±0.09 in / -0.03 in
(+2.4 mm / -0.8 mm)
≥6
+0.15 in / -0.03 in
(+4.0 mm / -0.8 mm)

Drilling
Bolt Circle
0.06 in (1.6 mm)
Bolt Hole Spacing
±0.03 in (±0.8 mm)
Eccentricity Bolt Circle
≤2.1/2
0.03 in max (0.8 mm max)
≥3
0.06 in max (1.6 mm max)
Thickness
≤18
+0.12 in / -0 (+3.2 mm / -0)
≥20
+0.18 in / -0 (+4.8 mm / -0)
Length thru Hub
≤10
0.06 in (1.6 mm)
≥12
±0.12 in (±3.2 mm)
Diameter Contact Face
0.06 in RF (1.6 mm)
±0.03 in (±0.8 mm)
0.25 in RF (6.35 mm)
±0.01 in (±0.4 mm)

Tongue and Groove
±0.01 in (±0.4 mm)
Male-Female
±0.01 in (±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