ANSI Standard B16.5 Class 400 Blind Flanges Thickness 0.56-3 in

Product Details

EO Flanges can provide ANSI B16.5 Class 400 Blind Flanges, which Raised Face Diameter from 1.38 to 27.25 in, Number of Holes from 4 to 24 pcs, Diameter of Holes from 0.63 to 1.88 in, etc. Blind: 1, Used to close ends of piping. 2, Has no bore. 3, Permits access to sealed lines. A Blind flange is round plate which has all of the relevant blowholes but no center hole, and because of this feature this flange is used to close off the ends of a piping systems and pressure vessel openings. It also permits easy access to the interior of a line or vessel once it has been sealed and must be reopened.

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ANSI B16.5 Class 400 Blind Flanges
Nominal Pipe Size	Outside Diameter (O)	Thickness (T)	Raised Face Diameter (R)	Approximate Weight (lbs)	Bolt Circle (C)	Number of Holes	Diameter of Holes
1/2	3.75	0.56	1.38	2	2.63	4	0.63
3/4	4.63	0.63	1.69	3	3.25	4	0.75
1	4.88	0.69	2	4	3.5	4	0.75
1 1/4	5.25	0.81	2.5	5	3.88	4	0.75
1 1/2	6.13	0.88	2.88	8	4.5	4	0.88
2	6.5	1	3.63	10	5	8	0.75
2 1/2	7.5	1.13	4.13	15	5.88	8	0.88
3	8.25	1.25	5	20	6.63	8	0.88
3 1/2	9	1.38	5.5	29	7.25	8	1
4	10	1.38	6.19	33	7.88	8	1
5	11	1.5	7.31	44	9.25	8	1
6	12.5	1.63	8.5	61	10.63	12	1
8	15	1.88	10.63	100	13	12	1.13
10	17.5	2.13	12.75	155	15.25	16	1.25
12	20.5	2.25	15	225	17.75	16	1.38
14	23	2.38	16.25	290	20.25	20	1.38
16	25.5	2.5	18.5	370	22.5	20	1.5
18	28	2.63	21	455	24.75	24	1.5
20	30.5	2.75	23	587	27	24	1.63
22	33	2.88	25.25	720	29.25	24	1.75
24	36	3	27.25	890	32	24	1.88

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