AWWA C228-19 Stainless-Steel Blind Flanges Add Flanges

Classes SA, SB, SD, SE, SF

Nominal Size	Class SA 50 psi	Class SB 86 psi	Class SD 150 psi	Class SE 275 psi	Class SF 300 psi
2	0.50	NA	NA	NA	NA
2¹⁄₂	0.50	NA	NA	NA	NA
3	0.50	NA	NA	NA	NA
4	0.50	0.625	0.625	1.125	1.13
5	0.50	0.625	0.65	1.188	1.21
6	0.50	0.688	0.693	1.313	1.31
8	0.50	0.688	0.8125	1.5	1.31
10	Use class SB	0.688	0.953	1.563	1.5
12	Use class SB	0.719	1.117	1.75	1.63
14	Use class SB	0.791	1.133	1.875	1.94
16	Use class SB	0.892	1.265	2	2.14
18	Use class SB	0.95	1.331	2.125	2.25
20	Use class SB	1.04	1.448	2.375	2.33
22	Use class SB	1.132	1.568	2.5	2.5
24	Use class SB	1.216	1.661	2.625	2.69
26	Use class SB	1.307	1.786	2.75	3
28	Use class SB	1.398	1.906	2.75	3.13
30	Use class SB	1.477	2.008	2.875	3.166
32	Use class SB	1.581	2.15	3	3.332
34	Use class SB	1.661	2.252	3.05	3.475
36	Use class SB	1.751	2.37	3.209	3.671
38	Use class SB	1.853	2.506	3.394	3.815
40	Use class SB	1.933	2.609	3.533	3.982
42	Use class SB	2.023	2.729	3.695	4.171
44	Use class SB	2.114	2.849	3.857	4.338
46	Use class SB	2.194	2.952	3.997	4.505
48	Use class SB	2.285	3.072	4.159	4.781
50	Use class SB	2.377	3.196	4.327	-
52	Use class SB	2.468	3.315	4.489	-
54	Use class SB	2.559	3.435	4.651	-
60	Use class SB	2.82	3.779	5.116	-
66	Use class SB	3.092	4.136	5.601	-
72	Use class SB	3.353	4.48	6.066	-

Dimensions are in inches
OD and Drilling are same as Slip On Flanges of Same Class; Dimensions Shown are Thicknesses