Dimensions in Inches Weld Neck Flanges and Stud Bolts ASME B16.5 Class 1500



Weld Neck flange

OTHER PRESSURE CLASSES

150
300
400
600
900
1500
NPS Dia
D
THK
B
Dia
A
Dia
OD
Height
H
Dia
K
Dia
L
1/2 4.75 0.88 1.5 0.84 2.38 3.25 7/8
3/4 5.12 1 1.75 1.05 2.75 3.5 7/8
1 5.88 1.12 2.06 1.32 2.88 4 1
1.1/4 6.25 1.12 2.5 1.66 2.88 4.38 1
1.1/2 7 1.25 2.75 1.9 3.25 4.88 1.1/8
2 8.5O 1.5 4.12 2.38 4 6.5 1
2.1/2 9.62 1.62 4.88 2.88 4.12 7.5 1.1/8
3 10.5 1.88 5.25 3.5 4.62 8 1.1/4
4 12.25 2.12 6.38 4.5 4.88 9.5 1.3/8
5 14.75 2.88 7.75 5.56 6.12 11.5 1.5/8
6 15.5 3.25 9 6.63 6.75 12.5 1.1/2
8 19 3.62 11.5 8.63 8.38 15.5 1.3/4
10 23 4.25 14.5 10.75 10 19 2
12 26.5 4.88 17.75 12.75 11.12 22.5 2.1/8
14 29.5 5.25 19.5 14 11.75 25 2.3/8
16 32.5 5.75 21.75 16 12.25 27.75 2.5/8
18 36 6.38 23.5 18 12.88 30.5 2.7/8
20 38.75 7 25.25 20 14 32.75 3.1/8
24 46 8 30 24 16 39 3.5/8

Important Information



Stud Bolts for the flanges above

NPS No of
Bolt
Holes
Dia
Stud
Bolts
Length
Stud
Bolts
1/2 4 3/4 4.25
3/4 4 3/4 4.5
1 4 7/8 5
1.1/4 4 7/8 5
1.1/2 4 1 5.5
2 8 7/8 5.75
2.1/2 8 1 6.25
3 8 1.1/8 7
4 8 1.1/4 7.75
5 8 1.1/2 9.75
6 12 1.3/8 10.25
8 12 1.5/8 11.5
10 12 1.7/8 13.25
12 16 2 14.75
14 16 2.1/4 16
16 16 2.1/2 17.5
18 16 2.3/4 19.5
20 16 3 21.25
24 16 3.1/2 24.25

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