Dimensions in Inches Weld Neck Flanges and Stud Bolts ASME B16.5 Class 2500



Weld Neck flange

OTHER PRESSURE CLASSES

150
300
400
600
900
2500
NPS Dia
D
THK
B
Dia
A
Dia
OD
Height
H
Dia
K
Dia
L
1/2 5.25 1.19 1.69 0.84 2.88 3.5 7/8
3/4 5.5 1.25 2 1.05 3.12 3.75 7/8
1 6.25 1.38 2.25 1.32 3.5 4.25 1
1.1/4 7.25 1.5 2.88 1.66 3.75 5.12 1.1/8
1.1/2 8 1.75 3.12 1.9 4.38 5.75 1.1/4
2 9.25 2 3.75 2.38 5 6.75 1.1/8
2.1/2 10.5 2.25 4.5 2.88 5.62 7.75 1.1/4
3 12 2.62 5.25 3.5 6.62 9 1.3/8
4 14 3 6.5 4.5 7.5 10.75 1.5/8
5 16.5 3.62 8 5.56 9 12.75 1.7/8
6 19 4.25 9.25 6.63 10.75 14.5 2.1/8
8 21.75 5 12 8.63 12.5 17.25 2.1/8
10 26.5 6.5 14.75 10.75 16.5 21.25 2.5/8
12 30 7.25 17.38 12.75 18.25 24.38 2.7/8

Important Information



Stud Bolts for the flanges above

NPS No of
Bolt
Holes
Dia
Stud
Bolts
Length
Stud
Bolts
1/2 4 3/4 4.75
3/4 4 3/4 5
1 4 7/8 5.5
1.1/4 4 1 6
1.1/2 4 1.1/8 6.75
2 8 1 7
2.1/2 8 1.1/8 7.75
3 8 1.1/4 8.75
4 8 1.1/2 10
5 8 1.3/4 11.75
6 8 2 13.5
8 12 2 15
10 12 2.1/2 19.25
12 12 2.3/4 21.25

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