Dimensions Weld Neck Flanges & Stud Bolts ASME B16.5



Weld Neck flange

OTHER DIAMETERS

NPS 18 - O.D. 457.2

CLass 150 300 600 900 1500 2500
DIA
A
505 533 545 565 597 ...
DIA
D
635 710 745 785 915 ...
THK
B
38.1 58.8 82.6 101.6 162 ...
39.7 60.4 89 108 168.4 ...
DIA
G
533.4 533.4 533.4 533.4 533.4 ...
DIA
K
577.9 628.6 654 685.8 775 ...
H 138 157 184 229 327 ...
139.6 158.6 190.4 235.4 333.4 ...
NO.
L
16 24 20 20 16 ...
DIA
L
31.8 34.9 44.5 50.8 73 ...
Stud Bolts Diameter x Length
DIA
(in)
1.1/8 1.1/4 1.5/8 1.7/8 2.3/4 ...
Lenght
(mm)
145 195 275 325 495 ...

Important Information

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.

Dimensional Tolerances of Weld Neck Flanges ASME B16.5
Outside Diameter *
Tolerances not listed in ASME B16.5 2013
≤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
≤2.1/2
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 and Groove
±0.4 mm (±0.01 in)
Male-Female
±0.4 mm (±0.01 in)
Welding bevel


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


Explore the World of Piping


© Werner Sölken 2008 -  
All rights reserved.
www.wermac.org uses Google Analytics


I must be old. I still believe in respect.