× NPS 1/2 NPS 3/4 NPS 1 NPS 1.1/4 NPS 1.1/2  ▸ NPS 2 NPS 2.1/2 NPS 3 NPS 3.1/2 NPS 4 NPS 5 NPS 6 NPS 8 NPS 10 NPS 12 NPS 14 NPS 16 NPS 18 NPS 20 NPS 24

Dimensions Weld Neck Flanges & Stud Bolts ASME B16.5

Weld Neck flange
OTHER DIA NPS 2 - O.D. 60.3
CLass 150 300 600 900 1500 2500
DIA A 78 84 84 105 105 95
DIA D 150 165 165 215 215 235
THK B 17.5 20.7 25.4 38.1 38.1 50.9
DIA G 91.9 91.9 91.9 91.9 91.9 91.9
DIA K 120.7 127 127 165.1 165.1 171.4
H 63.6 69.6 79.4 108.4 108.4 133.4
NO. L 4 8 8 8 8 8
DIA L 19.1 19.1 19.1 25.4 25.4 28.6
Stud Bolts Diameter x Length
DIA (in) 5/8 5/8 5/8 7/8 7/8 1
 lgth (mm 85 90 110 145 145 180

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.
  • IMPORTANT! please read this short article

Dimensional Tolerances of Weld Neck Flanges ASME B16.5
Welding bevel
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)


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

Related Post(s)

Dimensions Weld Neck Flanges Inch Standard
Dimensions Weld Neck Flanges Inch Standard
Flanges - ASME B16.5 - Inch Dimensions - Weld Neck/Stud Bolts Class 150 to Class 2500...






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