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ANSI 250 or 300 Lb. Plate Flange Specifications

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ANSI 250 or 300 Lb. Plate Flange Specifications

Manufactured by Various

Product Group Data
Normal	Outside Diameter	Diameter		Diameter
Pipe Size	of Flange	of Bore	Number of	of Bolts	Diameter of
Fractional	Fractional	Decimal	Bolt Holes	Holes	Bolt Circle
1/2	3 3/4	.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	3/4	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

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