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ANSI/ASME B16.1-1989 Class 125

Pipe Size Outside Diameter Inside Diameter Number of Bolt Holes Bolt Hole Diameter Bolt Circle

1" 4-1/4 ... 4 5/8 3-1/8
1-1/4" 4-5/8 ... 4 5/8 3-1/2
1-1/2" 5 ... 4 5/8 3-7/8
2" 6 ... 4 3/4 4-3/4
2-1/2" 7 ... 4 3/4 5-1/2

3" 7-1/2 ... 4 3/4 6
3-1/2" 8-1/2 ... 8 3/4 7
4" 9 ... 8 3/4 7-1/2
5" 10 ... 8 7/8 8-1/2
6" 11 ... 8 7/8 9-1/2

8" 13-1/2 ... 8 7/8 11-3/4
10" 16 ... 12 1 14-1/4
12" 19 ... 12 1 17
14" 21 ... 12 1-1/8 18-3/4
16" 23-1/2 ... 16 1-1/8 21-1/4

18" 25 ... 16 1-1/4 22-3/4
20" 27-1/2 ... 20 1-1/4 25
24" 32 ... 20 1-3/8 29-1/2
30" 38-3/4 ... 28 1-3/8 36
36" 46 ... 32 1-5/8 42-3/4

42" 53 ... 36 1-5/8 49-1/2
48" 59-1/2 ... 44 1-5/8 56
54" 66-1/4 ... 44 2 62-3/4
60" 73 ... 52 2 69-1/4

72" 86-1/2 ... 60 2 82-1/2
84" 99-3/4 ... 64 2-1/4 95-1/2
96" 113-1/4 ... 68 2-1/2 108-1/2

Notes:
This table is intended for estimating purposes only. Applications vary, confirm all dimensions with your engineering department prior to ordering. Refer to the ASME B16.1-1989 standard for complete engineering and applications information. All dimensions are in inches unless otherwise noted. Inside diameter and thickness dimensions are application specific.
  Stainless Plate Products, Inc.
1235 Manor Road
Coatesville, PA 19320
800-523-7532, 610-384-3910 fax