Dimensions of Class 300 Steel Flange Valves and Fittings

Nominal Size	Inside Diam.	OD of Flange	Raised Face Diam.	Thickness of Flange	Diam. Of Bolt Circle	Diam. Of Bolt Holes	No. of Bolt	Diam. of Bolt	Facing Diam.	Pitch Diam.	Ring No.	Depth of Groove	Width of Groove	Groove Fillet Radius
	d	D	g	T	C	h			K	P		E	F	r
inch	inch	inch	inch	inch	inch	inch	inch	inch	inch	inch		inch	inch	inch
mm	mm	mm	mm	mm	mm	mm	mm	mm	mm	mm		mm	mm	mm
1/2	0.50	3.75	1.38	0.56	2.62	0.62	4	1/2	2.00	1.344	R11	0.219	0.281	-
15	13	95	34.9	14.5	66.7	16			51	34.13		5.56	7.14	-
3/4	0.75	4.62	1.69	0.62	3.25	0.75	4	5/8	2.5	1.688	R13	0.25	0.344	-
20	19	117	42.9	16	82.5	20			63.5	42.86		6.35	8.74	-
1	1.00	4.88	2.00	0.69	3.5	0.75	4	5/8	2.75	2	R16	0.750	0.344	0.03
25	25	124	50.8	17.5	88.9	20			70.0	50.8		6.35	8.74	0.8
1 1/4	1.25	5.25	2.50	0.75	3.88	0.75	4	3/4	3.12	2.375	R18	0.750	0.344	0.03
32	32	133	63.5	19.5	98.4	20			79.5	60.33		6.35	8.74	0.8
1 1/2	1.50	6.12	2.88	0.81	4.5	0.88	4	5/8	3.56	2.688	R20	0.750	0.344	0.03
40	38	156	73	21	114.3	23			90.5	68.26		6.35	8.74	0.8
2	2.00	6.50	3.62	0.88	5.00	0.75	8	3/4	4.25	3.250	R23	0.312	0.469	0.03
50	51	165	92.1	22.5	127.0	20			108	82.55		7.92	11.91	0.8
2.5	2.50	7.50	4.12	1.00	5.88	0.88	8	3/4	5.00	4.000	R26	0.312	0.469	0.03
65	64	191	104.8	25.5	149.2	23			127	101.6		7.92	11.91	0.8
3	3.00	8.25	5.00	1.12	6.62	0.88	8	3/4	5.75	4.875	R31	0.312	0.469	0.03
80	76	210	127	29.0	168.3	23			146	128.83		7.92	11.91	0.8
3 1/2	3.50	9.00	5.50	1.19	7.25	0.88	8	3/4	6.25	5.188	R34	0.312	0.469	0.03
90	89	229	139.7	30.5	184.1	23			159	131.76		7.92	11.91	0.8
4	4.00	10.00	6.19	1.25	7.88	0.88	8	3/4	6.88	5.875	R37	0.312	0.469	0.03
100	102	254	157.2	32	200	23			175	149.23		7.92	11.91	0.8
5	5.00	11.00	7.31	1.38	9.25	0.88	8	3/4	8.25	7.125	R41	0.312	0.469	0.03
125	127	279	185.7	35	234.9	23			210	180.98		7.92	11.91	0.8
6	6.00	12.50	8.50	1.44	10.62	0.88	12	3/4	9.50	8.312	R45	0.312	0.469	0.03
150	152	318	215.9	37	269.9	23			241	211.14		7.92	11.91	0.8
8	8.00	15.00	10.62	1.62	13.00	1	12	7/8	11.88	10.265	R49	0.312	0.469	0.03
200	203	381	269.9	41.5	330.2	26			302	269.88		7.92	11.91	0.8
10	10.00	17.75	12.75	1.88	15.25	1.12	16	1	14.00	12.750	R53	0.312	0.469	0.03
250	254	445	323.8	48	387.3	29			356	323.85		7.92	11.91	0.8
12	12.00	20.50	15.00	2.00	17.75	1.25	16	1 1/8	16.25	15.000	R57	0.312	0.469	0.03
300	305	520	381	51	450.8	32			413	381		7.92	11.91	0.8
14	13.25	23.00	16.25	2.12	20.25	1.25	20	1 1/8	18.00	16.500	R61	0.312	0.469	0.03
350	337	585	412.8	54	514.3	32			457	419.1		7.92	11.91	0.8
16	15.25	25.50	18.50	2.25	22.50	1.38	20	1 1/4	20.00	18.500	R65	0.312	0.469	0.03
400	387	650	469.9	57.5	571.5	35			508	469.9		7.92	11.91	0.8
18	17.25	28.00	21.00	2.38	24.75	1.38	24	1 1/4	22.62	21.000	R69	0.312	0.469	0.03
450	432	710	533.4	60.5	628.6	35			575	533.4		7.92	11.91	0.8
20	19.25	30.50	23.00	2.50	27.00	1.38	24	1 1/4	25.00	23.000	R73	0.375	0.531	0.06
500	483	775	584.2	63.5	685.8	35			635	584.2		9.52	13.49	1.5
24	23.25	36.00	27.25	2.75	32.00	1.62	24	1 1/2	30.38	27.250	R77	0.438	0.656	0.06
600	584	915	692.2	70	812.8	42			749	692.15		11.13	16.66	1.5