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ANSI/ASME B16.5-1996 Class 1500

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

1/2" 4-3/4 0.88 4 7/8 3-1/4
3/4" 5-1/8 1.09 4 7/8 3-1/2
1" 5-7/8 1.36 4 1 4
1-1/4" 6-1/4 1.70 4 1 4-3/8

1-1/2" 7 1.95 4 1-1/8 4-7/8
2" 8-1/2 2.44 8 1 6-1/2
2-1/2" 9-5/8 2.94 8 1-1/8 7-1/2
3" 10-1/2 ... 8 1-1/4 8
4" 10 ... 8 1-3/8 9-1/2

5" 14-3/4 ... 8 1-5/8 11-1/2
6" 15-1/2 ... 12 1-1/4 12-1/2
8" 19 ... 12 1-3/4 15-1/2
10" 23 ... 12 2 19
12" 26-1/2 ... 16 2-1/8 22-1/2

14" 29-1/2 ... 16 2-3/8 25
16" 32-1/2 ... 16 2-5/8 27-3/4
18" 36 ... 16 2-7/8 30-1/2
20" 38-3/4 ... 16 3-1/8 32-3/4
24" 46 ... 16 3-5/8 39

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 B16.5-1996 standard for complete engineering and applications information. All dimensions are in inches unless otherwise noted. Inside diameter and thickness dimensions are application specific. Recommended bolts are 1/8" smaller than the nominal bolt hole diameters shown.
  Stainless Plate Products, Inc.
1235 Manor Road
Coatesville, PA 19320
800-523-7532, 610-384-3910 fax