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Library › Tri-clamp & pipe › ASME B16.5 Class 150 pipe flanges, NPS ½ to 24: dimensions, bolt…

Slip-on flange, NPS 20 Class 150

Slip-on flange, NPS 20 Class 150: OD 698.5 mm, raised face dia 584.2 x 1.6 mm, bolt circle 635.0 mm, 20 holes dia 31.8 mm for 1.125 in bolts; bore 513.1 mm, hub dia 558.8 mm drawn straight, length 71.4 mm from the raised face to the hub end

Exact dimensions. True size, no printing tolerance added. Threads are plain cylinders at the major diameter.

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Dimensions

NPS20
flange OD, in (mm)27.50 (698.5)
thickness incl. raised face, in (mm)1.69 (42.9)
raised-face dia, in (mm)23.00 (584.2)
bolt circle, in (mm)25.00 (635.0)
holes × hole dia, in20 × 1.25
bolt dia, in1.125
hub dia at base, in (mm)22.00 (558.8)
slip-on hub length, in2.81
weld-neck length, in5.62
slip-on bore, in20.20
weld-neck end OD, in20.00
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From the full sheet

ASME B16.5 Class 150 pipe flanges, NPS ½ to 24: dimensions, bolt circle, slip-on and blind: every size, notes, mating features and sources. What are the dimensions of an ASME B16.5 Class 150 flange (OD, thickness, raised face, bolt circle, bolt holes)?

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