Flange - Threaded, ANSI Class 250, B16.1, DI (in)

Written by Matt Milbury on . Posted in Ductile Iron Flange Datasheets

Flange - Threaded, ANSI Class 250, ASME B16.1, Raised Face (in) Ductile Iron Datasheet

  • Raised face flanges are available upon request.
  • Flanges may be back or spot faced for compliance with flange thickness tolerances.
  • Pipe face-to-face dimensions conform to a tolerance of ± .12" for sizes 4"- 48". Fittings face-to-face dimensions conform to a tolerance of ± .06" for sizes 4"-10" and ± .12" for sizes 12"- 48". The largest opening governs the tolerance for all openings. Center-to-face tolerances are one half the face-to-face tolerances.
  • The bolt circle and bolt holes of the above flanges match those of Class 250 flanges shown in ANSI/ASME B16.1.
  • Class 250 flanges do not match and can not be joined with Class 125 flanges shown in ANSI/ASME B16.1. Class 250 flanges are compatible with Class 300 flanges.

Data thdf B16.1 250Data thdf C115 125 1

Pipe

Size

(NPS)

Outside

Diameter

of

Flange

A

Diameter

of

Raised

Face

B

Thickness

of

Flange


C

Diameter

of Hub

at Base


J

Length

of

Hub


L

Number

of

Bolt

Holes

Diameter

of

Bolt

Holes

Bolt

Circle

Diameter


P

Approx.

Weight

4 10 6 15/16 1 1/4 - - 8 7/8 7 7/8 -
6 12 1/2 9 11/16 1 7/16 - - 12 7/8 10 5/8 -
8 15 11 15/16 1 5/8 - - 12 1 13 -
10 17 1/2 14 1/16 1 7/8 - - 16 1 1/8 15 1/4 -
12 20 1/2 16 7/16 2 - - 16 1 1/4 17 3/4 -
14 23 18 15/16 2 1/8 - - 20 1 1/4 20 1/4 -
16 25 1/2 21 1/16 2 1/4 - - 20 1 3/8 22 1/2 -
18 28 23 5/16 2 3/8 - - 24 1 3/8 24 3/4 -
20 30 1/2 25 9/16 2 1/2 - - 24 1 3/8 27 -
24 36 30 5/16 2 3/4 - - 24 1 5/8 32 -
30 43 3/4 37 3/16 3 - - 28 2 39 1/4 -
36 50 43 11/16 3 3/8 - - 32 2 1/4 46 -
42 57 50 7/16 3 11/16 - - 36 2 1/4 52 3/4 -
48 65 58 7/16 4 - - 40 2 1/4 60 3/4 -