Class 2500 Flange Dimensions

Class 2500 flange dimentions and bolt circles are as per ASME/ANSI B16.5 or ASME/ANSI 16.47. The dimensions are for end connection of class 2500 ball valve and other steel valves.

ANSI Class 2500 flange dimensions (RF)

ANSI Class 2500 Flange Dimensions (RF)

SIZE		O		R		C		T		h		Bolt
inch	mm	inch	mm	inch	mm	inch	mm	inch	mm	inch	mm	QTY.	Diameter
2	50	9.25	235	3.62	92	2.00	51.0	6.75	171.4	1.12	29	8	1
2 1/2	65	10.50	267	4.12	105	2.25	57.5	7.75	196.8	1.25	32	8	1 1/8
3	80	12.00	305	5.00	127	2.62	67.0	9.00	228.6	1.38	35	8	1 1/4
4	100	14.00	356	6.19	157	3.00	76.5	10.75	273.0	1.62	42	8	1 1/2
6	150	19.00	483	8.50	216	4.25	108.0	14.50	368.3	2.12	54	8	2
8	200	21.75	550	10.62	270	5.00	127.0	17.25	438.1	2.12	54	12	2
10	250	26.50	675	12.75	324	6.50	165.5	21.25	539.7	2.62	67	12	2 1/2
12	300	30.00	760	15.00	381	7.25	184.5	24.38	619.1	2.88	74	12	2 3/4

ANSI Class 2500 Flange Dimensions (RTJ)

Size		Ring No.	P		E		F		R		K
inch	mm	inch	inch	mm	inch	mm	inch	mm	inch	mm	inch	mm
2	50	R26	4.000	101.60	0.312	7.92	0.469	11.91	0.03	0.8	5.25	133
2-1/2	65	R28	4.375	111.12	0.375	9.52	0.531	13.49	0.03	0.8	5.88	149
3	80	R32	5.000	127.00	0.375	9.52	0.531	13.49	0.06	1.5	6.62	168
4	100	R38	6.188	157.18	0.438	11.13	0.656	16.66	0.06	1.5	8.00	203
6	150	R47	9.000	228.60	0.500	12.70	0.781	19.84	0.06	1.5	11.00	279
8	200	R51	11.000	279.40	0.562	14.27	0.906	23.01	0.06	1.5	13.38	340
10	250	R55	13.500	342.90	0.688	17.48	1.188	30.18	0.09	2.3	16.75	425
12	300	R60	16.000	406.40	0.688	17.48	1.312	33.32	0.09	2.3	19.50	495