Steel Pipe Flanges for Waterworks Services

Steel Pipe Flanges for Waterworks Services according ANSI/AWWA C207-01. Covers slip-on flanges with specifications for B-Ring (86 psi), D-Ring (175-150 psi), E-Ring (275 psi), and F-Ring (300 psi) pressure ratings.

Class	Pipe Size (in)	Outside Diameter (in)	Inside Diameter (in)	Number of Bolt Holes	Bolt Hole Diameter (in)	Bolt Circle (in)	Thickness (in)
B - 86 psi	4	9	4.57	8	0.75	7.5	0.625
B - 86 psi	5	10	5.66	8	0.875	8.5	0.625
B - 86 psi	6	11	6.72	8	0.875	9.5	0.6875
B - 86 psi	8	13.5	8.72	8	0.875	11.75	0.6875
B - 86 psi	10	16	10.88	12	1	14.25	0.6875
B - 86 psi	12	19	12.88	12	1	17	0.6875
B - 86 psi	14	21	14.19	12	1.125	18.75	0.6875
B - 86 psi	16	23.5	16.19	16	1.125	21.25	0.6875
B - 86 psi	18	25	18.19	16	1.25	22.75	0.6875
B - 86 psi	20	27.5	20.19	20	1.25	25	0.6875
B - 86 psi	22	29.5	22.19	20	1.375	27.25	0.75
B - 86 psi	24	32	24.19	20	1.375	29.5	0.75
D - 175-150 psi	4	9	4.57	8	0.75	7.5	0.625
D - 175-150 psi	5	10	5.66	8	0.875	8.5	0.625
D - 175-150 psi	6	11	6.72	8	0.875	9.5	0.6875
D - 175-150 psi	8	13.5	8.72	8	0.875	11.75	0.6875
D - 175-150 psi	10	16	10.88	12	1	14.25	0.6875
D - 175-150 psi	12	19	12.88	12	1	17	0.8125
D - 175-150 psi	14	21	14.19	12	1.125	18.75	0.9375
D - 175-150 psi	16	23.5	16.19	16	1.125	21.25	1
D - 175-150 psi	18	25	18.19	16	1.25	22.75	1.0625
D - 175-150 psi	20	27.5	20.19	20	1.25	25	1.125
D - 175-150 psi	22	29.5	22.19	20	1.375	27.25	1.1875
D - 175-150 psi	24	32	24.19	20	1.375	29.5	1.25
E - 275 psi	4	9	4.57	8	0.75	7.5	1.125
E - 275 psi	5	10	5.66	8	0.875	8.5	1.1875
E - 275 psi	6	11	6.72	8	0.875	9.5	1.3125
E - 275 psi	8	13.5	8.72	8	0.875	11.75	1.5
E - 275 psi	10	16	10.88	12	1	14.25	1.5625
E - 275 psi	12	19	12.88	12	1	17	1.75
E - 275 psi	14	21	14.19	12	1.125	18.75	1.875
E - 275 psi	16	23.5	16.19	16	1.125	21.25	2
E - 275 psi	18	25	18.19	16	1.25	22.75	2.125
E - 275 psi	20	27.5	20.19	20	1.25	25	2.375
E - 275 psi	22	29.5	22.19	20	1.375	27.25	2.5
E - 275 psi	24	32	24.19	20	1.375	29.5	2.625
F - 300 psi	4	10	4.57	8	0.875	7.875	1.13
F - 300 psi	5	11	5.66	8	0.875	9.25	1.21
F - 300 psi	6	12.5	6.72	12	0.875	10.625	1.31
F - 300 psi	8	15	8.72	12	1	13	1.31
F - 300 psi	10	17.5	10.88	16	1.125	15.25	1.50
F - 300 psi	12	20.5	12.88	16	1.25	17.75	1.63
F - 300 psi	14	23	14.19	20	1.25	20.25	1.94
F - 300 psi	16	25.5	16.19	20	1.375	22.5	2.14
F - 300 psi	18	28	18.19	24	1.375	24.75	2.25
F - 300 psi	20	30.5	20.19	24	1.375	27	2.33
F - 300 psi	22	33	22.19	24	1.375	29.25	2.50
F - 300 psi	24	36	24.19	24	1.625	32	2.69
F - 300 psi	26	38.25	26.25	28	1.875	34.5	3.00
F - 300 psi	28	40.75	28.25	28	1.875	37	3.13
F - 300 psi	30	43	30.25	28	1.875	39.25	3.15
F - 300 psi	32	45.25	32.25	28	1.875	41.5	3.25
F - 300 psi	34	47.5	34.25	28	1.875	43.5	3.38
F - 300 psi	36	50	36.25	32	2.125	46	3.46
F - 300 psi	38	52.25	38.25	32	2.125	48	3.50
F - 300 psi	40	54.25	54.25	36	2.125	50.25	3.63
F - 300 psi	42	57	42.25	36	2.125	52.75	3.81
F - 300 psi	44	59.25	44.25	36	2.125	55	4.00
F - 300 psi	46	61.5	46.25	40	2.125	57.25	4.13
F - 300 psi	48	65	48.25	40	2.125	60.75	4.50

Steel Pipe Flanges for Waterworks Services (ANSI/AWWA C207-01)

Standards Overview

This tool provides specifications for ANSI/AWWA C207-01 slip-on flanges used in waterworks services, organized by pressure rating classes:

Class B: 86 psi pressure rating
Class D: 175-150 psi pressure rating
Class E: 275 psi pressure rating
Class F: 300 psi pressure rating

Key Specifications

Each flange is characterized by:

Pipe Size: Nominal pipe diameter in inches
Outside Diameter: External flange diameter
Inside Diameter: Slip-on bore diameter for pipe connection
Number of Bolt Holes: Count of bolt holes in the flange
Bolt Hole Diameter: Size of each bolt hole
Bolt Circle: Diameter of the circle on which bolt holes are located
Thickness: Flange thickness

Reference

For metric conversions: 1 inch = 25.4 mm

Source: AWWA - American Water Works Association