Dimensions & Tolerances in Inches ASME B16.5

Dimensions in Inches Weld Neck Flanges & Stud Bolts according to ASME B16.5

Notes:

DIMENSIONAL TOLERANCES OF WELD NECK FLANGES ASME B16.5

OUTSIDE DIAMETER (NOTE 1)

≤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

≤2½
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 & Groove
±0.01 in (±0.4 mm)
Male-Female
±0.01 in (±0.4 mm)

Welding bevel

0.03 in (1 mm)
0.07 in (2 mm)
0.23 in (6 mm)

Tolerances not listed in ASME B16.5�2013