Flange Dimension Tolerances, ASME B16.5 (in)

Weld Neck Flange Dimension Tolerances, ASME B16.5 (in)

• When O.D. is 24" or less: ±1/16" (1.6mm)
• When O.D. is over 24": ±1/8" (3.2mm)

• 10" and smaller: ±1/32" (0.8mm)
• 12" thru 18": +1/8" (3.2mm)
• 20" and larger: -1/16" (1.6mm)

• 1/16" raised face: ±1/32" (0.8mm)
• 1/4" Raised Face, Tongue & Groove (male & female): ±1/64" (0.4mm)

• When hub base is 24" or smaller: ±1/16" (1.6mm)
• When hub base is over 24": ±1/8" (3.2mm)

• 5" and smaller: +3/32" (2.4mm), -1/32" (0.8mm)
• 6" and larger: +5/32" (4.0mm), -1/32 (0.8mm)

• Bolt circle: ±1/16" (1.6mm)
• Bolt hole spacing: ±1/32" (0.8mm)

• 2 1/2" and smaller ±1/32" (0.8mm) max.
• 3" and larger ±1/16" (1.6mm) max.

• 18" and smaller: ±1/8" (3.2mm), -0"
• 20" and larger: ±3/16" (4.8mm), -0"

• 10" and smaller: ±1/16" (1.6mm)
• 12" and larger: ±1/8" (3.2mm)

Blind, Lap Joint, Slip-on, Socket, Threaded Flange Dimension Tolerances, ASME B16.5 (in)

• When O.D. is 24" or less: ±1/16" (1.6mm)
• When O.D. is over 24": ±1/8" (3.2mm)

• Threaded: within limits of boring gauge
• Lap Joint, Slip-on, Socket
  • 10" and smaller: ±1/32" (0.8mm), 0"
  • 12" and larger: -1/16" (1.6mm), 0"

• 1/16" raised face: ±1/32" (0.8mm)
• 1/4" Raised Face, Tongue & Groove (male & female): ±1/64" (0.4mm)

• Threaded (S): within limits of boring gauge
• Lap Joint (F), Slip-on (E), Socket (E)
  • 10" and smaller: ±1/32" (0.8mm), 0"
  • 12" and larger: -1/16" (1.6mm), 0"

• Bolt circle: ±1/16" (1.6mm)
• Bolt hole spacing: ±1/32" (0.8mm)
• Eccentricity of bolt circle with respect to facing
  • 2 1/2" and smaller ±1/32" (0.8mm) max.
  • 3" and larger ±1/16" (1.6mm) max.

• 18" and smaller: ±1/8" (3.2mm), -0"
• 20" and larger: ±3/16" (4.8mm), -0"

• 18" and smaller: ±1/8" (3.2mm), ±1/32" (0.8mm)
• 20" and larger: ±3/16" (4.8mm), ±1/16" (1.6mm)