Class 2500 Standard Connections Flanges

Size			Flange			Barrel OD			Bolting			Nut			Stud Bolt			Weights						Length
Nom	Bore LWN & E	Bore HB	OD	Thk	RF of OD	LWN	HB	E	# ofHoles	Hole Size	Bolt Circle	Stop Dia	Relief Dia	Relief Length	Size	RF Length	RTJ Length	LWN		HB		E		Base
	B	B	O	T	R	D	D	D			C	NS	NR	NL				Base	Per 1″	Base	Per 1″	Base	Per 1″	L
1/2	0.5	0.55	5.25	1.19	1.38	1.81	2.25	5.25	4	0.88	3.5	2.25	1.81	1	3/4	4 3/4	4 3/4	11	0.7	14	1.1	45	6.1	9
3/4	0.75	0.74	5.5	1.25	1.69	2.06	2.5	5.5	4	0.88	3.75	2.5	2.06	1	3/4	5	5	13	0.8	17	1.3	49	6.6	9
1	1	0.96	6.25	1.38	2	2.25	2.81	6.25	4	1	4.25	2.81	2.25	1.12	7/8	5 1/2	5 1/2	18	0.9	22	1.6	62	8.5	9
1 1/4	1.25	1.28	7.25	1.5	2.5	2.88	3.5	7.25	4	1.12	5.12	3.5	2.88	1.25	1	6	6	27	1.5	32	2.4	84	11	9
1 1/2	1.5	1.5	8	1.75	2.88	3.12	3.94	8	4	1.25	5.75	3.94	3.12	1.38	1 1/8	6 3/4	6 3/4	33	1.7	42	3	94	14	9
2	2	1.94	9.25	2	3.62	3.75	5.12	9.25	8	1.12	6.75	5.12	3.75	1.25	1	7	7	48	2.2	66	5	131	18	9
2 1/2	2.5	2.32	10.5	2.25	4.12	4.5	5.94	10.5	8	1.25	7.75	5.94	4.5	1.38	1 1/8	7 3/4	8	66	3.1	90	6.7	165	23	9
3	3	2.9	12	2.62	5	5.25	7	12	8	1.38	9	7	5.25	1.5	1 1/4	8 3/4	9	97	4.1	127	9	210	30	9
4	4	3.83	14	3	6.19	6.5	8.38	14	8	1.62	10.75	8.38	6.5	1.75	1 1/2	10	10 1/4	159	5.8	218	12	391	40	12
5	5	4.81	16.5	3.62	7.31	8	10	16.5	8	1.88	12.75	10	8	2	1 3/4	11 3/4	12 1/4	248	8.7	319	17	518	55	12
6	6	5.76	19	4.25	8.5	9.25	11.38	19	8	2.12	14.5	11.38	9.25	2.25	2	13 1/2	14	358	11	441	21	641	73	12
8	8	7.62	21.75	5	10.62	12	14.12	21.75	12	2.12	17.25	14.12	12	2.25	2	15	15 1/2	589	18	743	31	1167	92	16
10	10	9.56	26.5	6.5	12.75	14.75	17.38	26.50	12	2.62	21.25	17.38	14.75	2.75	2 1/2	19 1/4	20	997	26	1202	47	1625	134	16
12	12	11.38	30	7.25	15	17.38	20.12	30	12	2.88	24.38	20.12	17.38	3	2 3/4	21 1/4	22	1363	35	1609	61	1995	168	16