Stainless Plate Products, Inc.

Stainless PLATE FLANGE

reference guide.

Applications

These plate flange reference tables detail outside and inside diameter sizes and bolt hole drilling pattens for various standard plate flanges. They are intended for estimating purposes only. Applications vary, confirm all dimensions with your engineering department prior to ordering.

Standard Flanges

Stainless Plate Products produces a wide variety of flat face slip-on flanges (also known as hubless or plate flanges). These high quality plate flanges have a wide variety of applications. Click on the Classes below to view specs.

AWWA C207-94

Class B Plate Flanges

AWWA C207-94 Class B Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle Thickness
4" 9 4.57 8 3/4 7-1/2 5/8
5" 10 5.66 8 7/8 8-1/2 5/8
6" 11 6.72 8 7/8 9-1/2 11/16
8" 13-1/2 8.72 8 7/8 11-3/4 11/16
10" 16 10.88 12 1 14-1/4 11/16
12" 19 12.88 12 1 17 11/16
14" 21 14.19 12 1-1/8 18-3/4 11/16

16" 23-1/2 16.19 16 1-1/8 21-1/4 11/16
18" 25 18.19 16 1-1/4 22-3/4 11/16
20" 27-1/2 20.19 20 1-1/4 25 11/16
22" 29-1/2 22.19 20 1-3/8 27-1/4 3/4
24" 32 24.19 20 1-3/8 29-1/2 3/4
26" 34-1/4 - 24 1-3/8 31-3/4 13/16
28" 36-1/2 - 28 1-3/8 34 7/8

30" 38-3/4 - 28 1-3/8 36 7/8
32" 41-3/4 - 28 1-5/8 38-1/2 15/16
34" 43-3/4 - 32 1-5/8 40-1/2 15/16
36" 46 - 32 1-5/8 42-3/4 1
38" 48-3/4 - 32 1-5/8 45-1/4 1
40" 50-3/4 - 36 1-5/8 47-1/4 1
42" 53 - 36 1-5/8 49-1/2 1-1/8

44" 55-1/4 - 40 1-5/8 51-3/4 1-1/8
46" 57-1/4 - 40 1-5/8 53-3/4 1-1/8
48" 59-1/2 - 44 1-5/8 56 1-1/4
50" 61-3/4 - 44 1-7/8 58-1/4 1-1/4
52" 64 - 44 1-7/8 60-1/2 1-1/4
54" 66-1/4 - 44 1-7/8 62-3/4 1-3/8
60" 73 - 52 1-7/8 69-1/4 1-1/2

66" 80 - 52 1-7/8 76 1-5/8
72" 86-1/2 - 60 1-7/8 82-1/2 1-3/4
78" 93 - 64 2-1/8 89 2
84" 99-3/4 - 64 2-1/8 95-1/2 2
90" 106-1/2 - 68 2-3/8 102 2-1/4
96" 113-1/4 - 68 2-3/8 108-1/2 2-1/4
102" 120 - 72 2-5/8 114-1/2 2-1/2

108" 126-3/4 - 72 2-5/8 120-3/4 2-1/2
114" 133-1/2 - 76 2-7/8 126-3/4 2-3/4
120" 140-1/4 - 76 2-7/8 132-3/4 2-3/4
126" 147 - 80 3-1/8 139-1/4 3
132" 153-3/4 - 80 3-1/8 145-3/4 3
138" 160-1/2 - 84 3-3/8 152 3-1/4
144" 167-1/4 - 84 3-3/8 158-1/4 3-1/4

This table is intended for estimating purposes only. Applications vary, confirm all dimensions with your engineering department prior to ordering. Refer to the AWWA C207-94 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.

Class D Plate Flanges

AWWA C207-94 Class D Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle Thickness
4" 9 4.57 8 3/4 7-1/2 5/8
5" 10 5.66 8 7/8 8-1/2 5/8
6" 11 6.72 8 7/8 9-1/2 11/16
8" 13-1/2 8.72 8 7/8 11-3/4 11/16
10" 16 10.88 12 1 14-1/4 11/16
12" 19 12.88 12 1 17 13/16
14" 21 14.19 12 1-1/8 18-3/4 15/16

16" 23-1/2 16.19 16 1-1/8 21-1/4 1
18" 25 18.19 16 1-1/4 22-3/4 1-1/16
20" 27-1/2 20.19 20 1-1/4 25 1-1/8
22" 29-1/2 22.19 20 1-3/8 27-1/4 1-3/16
24" 32 24.19 20 1-3/8 29-1/2 1-1/4
26" 34-1/4 - 24 1-3/8 31-3/4 1-5/16
28" 36-1/2 - 28 1-3/8 34 1-5/16

30" 38-3/4 - 28 1-3/8 36 1-3/8
32" 41-3/4 - 28 1-5/8 38-1/2 1-1/2
34" 43-3/4 - 32 1-5/8 40-1/2 1-1/2
36" 46 - 32 1-5/8 42-3/4 1-5/8
38" 48-3/4 - 32 1-5/8 45-1/4 1-5/8
40" 50-3/4 - 36 1-5/8 47-1/4 1-5/8
42" 53 - 36 1-5/8 49-1/2 1-3/4

44" 55-1/4 - 40 1-5/8 51-3/4 1-3/4
46" 57-1/4 - 40 1-5/8 53-3/4 1-3/4
48" 59-1/2 - 44 1-5/8 56 1-7/8
50" 61-3/4 - 44 1-7/8 58-1/4 2
52" 64 - 44 1-7/8 60-1/2 2
54" 66-1/4 - 44 1-7/8 62-3/4 2-1/8
60" 73 - 52 1-7/8 69-1/4 2-1/4

66" 80 - 52 1-7/8 76 2-1/2
72" 86-1/2 - 60 1-7/8 82-1/2 2-5/8
78" 93 - 64 2-1/8 89 2-3/4
84" 99-3/4 - 64 2-1/8 95-1/2 2-7/8
90" 106-1/2 - 68 2-3/8 102 3
96" 113-1/4 - 68 2-3/8 108-1/2 3-1/4
102" 120 - 72 2-5/8 114-1/2 3-1/4

108" 126-3/4 - 72 2-5/8 120-3/4 3-3/8
114" 133-1/2 - 76 2-7/8 126-3/4 3-1/2
120" 140-1/4 - 76 2-7/8 132-3/4 3-1/2
126" 147 - 80 3-1/8 139-1/4 3-3/4
132" 153-3/4 - 80 3-1/8 145-3/4 3-7/8
138" 160-1/2 - 84 3-3/8 152 4
144" 167-1/4 - 84 3-3/8 158-1/4 4-1/8

This table is intended for estimating purposes only. Applications vary, confirm all dimensions with your engineering department prior to ordering. Refer to the AWWA C207-94 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.

Class E Plate Flanges

AWWA C207-94 Class E Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle Thickness
4" 9 4.57 8 3/4 7-1/2 1-1/8
5" 10 5.66 8 7/8 8-1/2 1-3/16
6" 11 6.72 8 7/8 9-1/2 1-5/16
8" 13-1/2 8.72 8 7/8 11-3/4 1-1/2
10" 16 10.88 12 1 14-1/4 1-9/16
12" 19 12.88 12 1 17 1-3/4
14" 21 14.19 12 1-1/8 18-3/4 1-7/8

16" 23-1/2 16.19 16 1-1/8 21-1/4 2
18" 25 18.19 16 1-1/4 22-3/4 2-1/8
20" 27-1/2 20.19 20 1-1/4 25 2-3/8
22" 29-1/2 22.19 20 1-3/8 27-1/4 2-1/2
24" 32 24.19 20 1-3/8 29-1/2 2-5/8
26" 34-1/4 - 24 1-3/8 31-3/4 2-3/4
28" 36-1/2 - 28 1-3/8 34 2-3/4

30" 38-3/4 - 28 1-3/8 36 2-7/8
32" 41-3/4 - 28 1-5/8 38-1/2 3
34" 43-3/4 - 32 1-5/8 40-1/2 3
36" 46 - 32 1-5/8 42-3/4 3-1/8
38" 48-3/4 - 32 1-5/8 45-1/4 3-1/8
40" 50-3/4 - 36 1-5/8 47-1/4 3-1/4
42" 53 - 36 1-5/8 49-1/2 3-3/8

44" 55-1/4 - 40 1-5/8 51-3/4 3-3/8
46" 57-1/4 - 40 1-5/8 53-3/4 3-7/16
48" 59-1/2 - 44 1-5/8 56 3-1/2
50" 61-3/4 - 44 1-7/8 58-1/4 3-1/2
52" 64 - 44 1-7/8 60-1/2 3-5/8
54" 66-1/4 - 44 1-7/8 62-3/4 3-3/4
60" 73 - 52 1-7/8 69-1/4 3-7/8

66" 80 - 52 1-7/8 76 4-1/4
72" 86-1/2 - 60 1-7/8 82-1/2 4-3/8
78" 93 - 64 2-1/8 89 4-3/4
84" 99-3/4 - 64 2-1/8 95-1/2 4-3/4
90" 106-1/2 - 68 2-3/8 102 5-1/8
96" 113-1/4 - 68 2-3/8 108-1/2 5-1/8
102" 120 - 72 2-5/8 114-1/2 5-1/2

108" 126-3/4 - 72 2-5/8 120-3/4 5-1/2
114" 133-1/2 - 76 2-7/8 126-3/4 5-7/8
120" 140-1/4 - 76 2-7/8 132-3/4 5-7/8
126" 147 - 80 3-1/8 139-1/4 6-1/4
132" 153-3/4 - 80 3-1/8 145-3/4 6-1/4
138" 160-1/2 - 84 3-3/8 152 6-3/4
144" 167-1/4 - 84 3-3/8 158-1/4 6-3/4

This table is intended for estimating purposes only. Applications vary, confirm all dimensions with your engineering department prior to ordering. Refer to the AWWA C207-94 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.

Class F Plate Flanges

AWWA C207-94 Class F Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle Thickness
4" 10 4.57 8 7/8 7-7/8 1.13
5" 11 5.66 8 7/8 9-1/4 1.21
6" 12-1/2 6.72 12 7/8 10-5/8 1.31
8" 15 8.72 12 1 13 1.31
10" 17-1/2 10.88 16 1-1/8 15-1/4 1.50
12" 20-1/2 12.88 16 1-1/4 17-3/4 1.63

14" 23 14.19 20 1-1/4 20-1/4 1.94
16" 25-1/2 16.19 20 1-3/8 22-1/2 2.14
18" 28 18.19 24 1-3/8 24-3/4 2.25
20" 30-1/2 20.19 24 1-3/8 27 2.33
22" 33 22.19 24 1-3/8 29-1/4 2.50
24" 36 24.19 24 1-5/8 32 2.69

26" 38-1/4 26.25 28 1-7/8 34-1/2 3.00
28" 40-3/4 28.25 28 1-7/8 37 3.13
30" 43 30.25 28 1-7/8 39-1/4 3.15
32" 45-1/4 32.25 28 1-7/8 41-1/2 3.25
34" 47-1/2 34.25 28 1-7/8 43-1/2 3.38
36" 50 36.25 32 2-1/8 46 3.46

38" 52-1/4 38.25 32 2-1/8 48 3.50
40" 54-1/4 54.25 36 2-1/8 50-1/4 3.63
42" 57 42.25 36 2-1/8 52-3/4 3.81
44" 59-1/4 44.25 36 2-1/8 55 4.00
46" 61-1/2 46.25 40 2-1/8 57-1/4 4.13
48" 65 48.25 40 2-1/8 60-3/4 4.50

This table is intended for estimating purposes only. Applications vary, confirm all dimensions with your engineering department prior to ordering. Refer to the AWWA C207-94 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.

ANSI/ASME B16.1-1989

Class 25 Plate Flanges

ANSI/ASME B16.1-1989 Class 25 Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle
4" 9 - 8 3/4 7-1/2
5" 10 - 8 3/4 8-1/2
6" 11 - 8 3/4 9-1/2
8" 13-1/2 - 8 3/4 11-3/4
10" 16 - 12 3/4 14-1/4

12" 19 - 12 3/4 17
14" 21 - 12 7/8 18-3/4
16" 23-1/2 - 16 7/8 21-1/4
18" 25 - 16 7/8 22-3/4
20" 27-1/2 - 20 7/8 25

24" 32 - 20 7/8 29-1/2
30" 38-3/4 - 28 1 36
36" 46 - 32 1 42-3/4
42" 53 - 36 1-1/8 49-1/2
48" 59-1/2 - 44 1-1/8 56

54" 66-1/4 - 44 1-1/8 62-3/4
60" 73 - 52 1-1/4 69-1/4
72" 86-1/2 - 60 1-1/4 82-1/2
84" 99-3/4 - 64 1-3/8 95-1/2
96" 113-1/4 - 68 1-3/8 108-1/2

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.

Class 125 Plate Flanges

ANSI/ASME B16.1-1989 Class 125 Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. 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

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.

Class 250 Plate Flanges

ANSI/ASME B16.1-1989 Class 250 Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle
1" 4-7/8 - 4 3/4 3-1/2
1-1/4" 5-1/4 - 4 3/4 3-7/8
1-1/2" 6-1/8 - 4 7/8 4-1/2
2" 6-1/2 - 8 3/4 5
2-1/2" 7-1/2 - 8 7/8 5-7/8

3" 8-1/4 - 8 7/8 6-5/8
3-1/2" 9 - 8 7/8 7-1/4
4" 10 - 8 7/8 7-7/8
5" 11 - 8 7/8 9-1/4
6" 12-1/2 - 12 7/8 10-5/8

8" 15 - 12 1 13
10" 17-1/2 - 16 1-1/8 15-1/4
12" 20-1/2 - 16 1-1/4 17-3/4
14" 23 - 20 1-1/4 20-1/4
16" 25-1/2 - 20 1-3/8 22-1/2

18" 28 - 24 1-3/8 24-3/4
20" 30-1/2 - 24 1-3/8 27
24" 36 - 24 1-5/8 32
30" 43 - 28 2 39-1/4
36" 50 - 32 2-1/4 46

42" 57 - 36 2-1/4 52-3/4
48" 65 - 40 2-1/4 60-3/4

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.

Class 800 Plate Flanges

ANSI/ASME B16.1-1989 Class 800 Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle
2" 6-1/2 - 8 3/4 5
2-1/2" 7-1/2 - 8 7/8 5-7/8
3" 8-1/4 - 8 7/8 6-5/8
3-1/2" 9 - 8 1 7-1/4
4" 10-3/4 - 8 1 8-1/2

5" 13 - 8 1-1/8 10-1/2
6" 14 - 12 1-1/8 11-1/2
8" 16-1/2 - 12 1-1/4 13-3/4
10" 20 - 16 1-3/8 17
12" 22 - 20 1-3/8 19-1/4

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.

ANSI/ASME B16.1-1996

Class 150 Plate Flanges

ANSI/ASME B16.5-1996 Class 150 Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle
1/2" 3-1/2 0.88 4 5/8 2-3/8
3/4" 3-7/8 1.09 4 5/8 2-3/4
1" 4-1/4 1.36 4 5/8 3-1/8
1-1/4" 4-5/8 1.70 4 5/8 3-1/2
1-1/2" 5 1.95 4 5/8 3-7/8

2" 6 2.44 4 3/4 4-3/4
2-1/2" 7 2.94 4 3/4 5-1/2
3" 7-1/2 3.57 4 3/4 6
3-1/2" 8-1/2 4.07 8 3/4 7
4" 9 4.60 8 3/4 7-1/2

5" 10 5.66 8 7/8 8-1/2
6" 11 6.72 8 7/8 9-1/2
8" 13-1/2 8.72 8 7/8 11-3/4
10" 16 10.88 12 1 14-1/4
12" 19 12.88 12 1 17

14" 21 14.14 12 1-1/8 18-3/4
16" 23-1/2 16.16 16 1-1/8 21-1/4
18" 25 18.18 16 1-1/4 22-3/4
20" 27-1/2 20.20 20 1-1/4 25
24" 32 24.25 20 1-3/8 29-1/2

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.

Class 300 Plate Flanges

ANSI/ASME B16.5-1996 Class 300 Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle
1/2" 3-3/4 0.88 4 5/8 2-5/8
3/4" 4-5/8 1.09 4 3/4 3-1/4
1" 4-7/8 1.36 4 3/4 3-1/2
1-1/4" 5-1/4 1.70 4 3/4 3-7/8
1-1/2" 6-1/8 1.95 4 7/8 4-1/2

2" 6-1/2 2.44 8 3/4 5
2-1/2" 7-1/2 2.94 8 7/8 5-7/8
3" 8-1/4 3.57 8 7/8 6-5/8
3-1/2" 9 4.07 8 7/8 7-1/4
4" 10 4.57 8 7/8 7-7/8

5" 11 5.66 8 7/8 9-1/4
6" 12-1/2 6.72 12 7/8 10-5/8
8" 15 8.72 12 1 13
10" 17-1/2 10.88 16 1-1/8 15-1/4
12" 20-1/2 12.88 16 1-1/4 17-3/4

14" 23 14.14 20 1-1/4 20-1/4
16" 25-1/2 16.16 20 1-3/8 22-1/2
18" 28 18.18 24 1-3/8 24-3/4
20" 30-1/2 20.20 24 1-3/8 27
24" 36 24.25 24 1-5/8 32

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.

Class 400 Plate Flanges

ANSI/ASME B16.5-1996 Class 400 Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle
1/2" see Class 600
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2"
3"
3-1/2"

4" 10 4.57 8 1 8-7/8
5" 11 5.66 8 1 9-1/4
6" 12-1/2 6.72 12 1 10-5/8
8" 15 8.72 12 1-1/8 13
10" 17-1/2 10.88 16 1-1/4 15-1/4
12" 20-1/2 12.88 16 1-3/8 17-3/4

14" 23 14.14 20 1-3/8 20-1/4
16" 25-1/2 16.16 20 1-1/2 22-1/2
18" 28 18.18 24 1-1/2 24-3/4
20" 30-1/2 20.20 24 1-5/8 27
24" 36 24.25 24 1-7/8 32

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.

Class 600 Plate Flanges

ANSI/ASME B16.5-1996 Class 600 Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle
1/2" 3-3/4 0.88 4 5/8 2-5/8
3/4" 4-5/8 1.09 4 3/4 3-1/4
1" 4-7/8 1.36 4 3/4 3-1/2
1-1/4" 5-1/4 1.70 4 3/4 3-7/8
1-1/2" 6-1/8 1.95 4 7/8 4-1/2

2" 6-1/2 2.44 8 3/4 5
2-1/2" 7-1/2 2.94 8 7/8 5-7/8
3" 8-1/4 3.57 8 7/8 6-5/8
3-1/2" 9 4.07 8 1 7-1/4
4" 10-3/4 4.57 8 1 8-1/2

5" 13 5.66 8 1-1/2 10-1/2
6" 14 6.72 12 1-1/2 11-1/2
8" 16-1/2 8.72 12 1-1/4 13-3/4
10" 20 10.88 16 1-3/8 17
12" 22 12.88 20 1-3/8 19-1/4

14" 23-3/4 14.14 20 1-1/2 20-3/4
16" 27 16.16 20 1-5/8 23-3/4
18" 29-1/4 18.18 20 1-3/4 25-3/4
20" 32 20.20 24 1-3/4 28-1/2
24" 37 24.25 24 2 33

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.

Class 900 Plate Flanges

ANSI/ASME B16.5-1996 Class 900 Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle
1/2" see Class 1500
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2"

3" 9-1/2 3.57 8 1-1/8 7-1/2
4" 11-1/2 4.57 8 1-1/4 9-1/4

5" 13-3/4 5.66 8 1-3/8 11
6" 15 6.72 12 1-1/4 12-1/2
8" 18-1/2 8.72 12 1-1/2 15-1/2
10" 21-1/2 10.88 16 1-1/2 18-1/2
12" 24 12.88 20 1-1/2 21

14" 25-1/4 14.14 20 1-5/8 22
16" 27-3/4 16.16 20 1-3/4 24-1/4
18" 31 18.18 20 2 27
20" 33-3/4 20.20 20 2-1/8 29-1/2
24" 41 24.25 20 2-5/8 35-1/2

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.

Class 1500 Plate Flanges

ANSI/ASME B16.5-1996 Class 1500 Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. 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

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.

Class 2500 Plate Flanges

ANSI/ASME B16.5-1996 Class 2500 Plate Flanges

Pipe Size OD ID # Bolt Holes Bolt Hole Dia. Bolt Circle
1/2" 5-1/4 - 4 7/8 3-1/2
3/4" 5-1/2 - 4 7/8 3-3/4
1" 6-1/4 - 4 1 4-1/4
1-1/4" 7-1/4 - 4 1-1/8 5-1/8
1-1/2" 8 - 4 1-1/4 5-3/4

2" 9-1/4 - 8 1-1/8 6-3/4
2-1/2" 10-1/2 - 8 1-1/4 7-3/4
3" 12 - 8 1-3/8 9
4" 14 - 8 1-5/8 10-3/4

5" 16-1/2 - 8 1-7/8 12-3/4
6" 19 - 8 2-1/8 14-1/2
8" 21-3/4 - 12 2-1/8 17-1/4
10" 26-1/2 - 12 2-5/8 21-1/4
12" 30 - 12 2-7/8 24-3/8

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.

Advantages

Stainless steel plate flanges are produced from quality mill plate. Mill plate produced to the ASTM A240 and ASME SA240 standards is virtually free of voids, non-metallic inclusions and other defects. The inherent corrosion resistance of stainless steel is enhanced by the superior grain structure offered by plate products over forged or cast products.

As companies begin to look at life-cycle costing models, in almost every case, the slightly higher initial cost of stainless steel plate flanges is more than offset by the extended service life and the reduction of the normal maintenance costs.

Stainless steel plate flanges are a widely accepted alternative to cast or forged flanges in low pressure applications.

Slip-On
Standard plate flange with a raised face.

 slip-on type plate flange

Blind
Standard plate flange with a raised face but no inside diameter.

 blind plate flange

Angle Face Ring
 Standard plate flange with a raised face and inside diameter chamfer.

 angle face plate flange

Lap Join
Similar to the angle face plate flange but with a radius on the inside diameter instead of a chamfer.

 lap joint plate flange

Socket Weld
Standard plate flange with raised face on the top and bottom, and in inside diameter counter bore.

 socket weld plate flange

Studding Outlet
Standard plate flange with a raised face and blind, drilled and tapped holes.

 studding outlet plate flange

 

Specialty Plate Flanges

In addition to our stock of standard flanges, we also offer specialty plate flange products which include machining details such as gasket surfaces, non-standard drilling, facing details, bevel and radius edges, o-ring grooves and raised or recessed faces. Some typical examples are shown below.

Raised Face

raised face plate flange

Counter Bore

counter bore plate flange

Radius

radius plate flange

Chamfer

chamfer plate flange

O-Ring Groove

o-ring groove plate flange

Gasket Surface

gasket surface plate flange

Standard plate flanges can be customized to suit your application with a variety of machining details.