Nom. Pipe Size	O	Q*	R	X	No. and Dia. of Bolt Holes**	Bolt Circle Dia	YY*	H	J	Y*	B	r	YV	BB	C	T
½	4.75	0.88	1.38	1.5	4-0.88	3.25	2.38	0.84	To Be S p e c i f i e d by P u r c a s e r	1.25	0.88	0.12	1.25	0.9	0.93	0.88
¾	5.12	1	1.69	1.75	4-0.88	3.5	2.75	1.05		1.38	1.09	0.12	1.38	1.11	1.14	1
1	5.88	1.12	2	2.06	4-1.00	4	2.88	1.32		1.62	1.36	0.12	1.62	1.38	1.41	1.12
1¼	6.25	1.12	2.5	2.5	4-1.00	4.38	2.88	1.66		1.62	1.7	0.19	1.62	1.72	1.75	1.19
1½	7	1.25	2.88	2.75	4-1.12	4.88	3.25	1.9		1.75	1.95	0.25	1.75	1.97	1.99	1.25
2	8.5	1.5	3.62	4.12	8-1.00	6.5	4	2.38		2.25	2.44	0.31	2.25	2.46	2.5	1.5
2½	9.62	1.62	4.12	4.88	8-1.12	7.5	4.12	2.88		2.5	2.94	0.31	2.5	2.97	3	1.88
3	9.5	1.5	5	5	8-1.00	7.5	4	3.5		2.12	3.57	0.38	2.12	3.6	3.63	1.62
4	11.5	1.75	6.19	6.25	8-1.25	9.25	4.5	4.5		2.75	4.57	0.44	2.75	4.6	4.63	1.88
5	13.75	2	7.31	7.5	8-1.38	11	5	5.56		3.12	5.66	0.44	3.12	5.69	5.69	2.12
6	15	2.19	8.5	9.25	12-1.25	12.5	5.5	6.63		3.38	6.72	0.5	3.38	6.75	6.75	2.25
8	18.5	2.5	10.62	11.75	12-1.50	15.5	6.38	8.63		4	8.72	0.5	4.5	8.75	8.75	2.5
10	21.5	2.75	12.75	14.5	16-1.50	18.5	7.25	10.75		4.25	10.88	0.5	5	10.92	10.88	2.81
12	24	3.12	15	16.5	20-1.50	21	7.88	12.75		4.62	12.88	0.5	5.62	12.92	12.94	3
14	25.25	3.38	16.25	17.75	20-1.62	22	8.38	14		5.12	14.14	0.5	6.12	14.18	14.19	3.25
16	27.75	3.5	18.5	20	20-1.75	24.25	8.5	16		5.25	16.16	0.5	6.5	16.19	16.19	3.38
18	31	4	21	22.25	20-2.00	27	9	18		6	18.18	0.5	7.5	18.2	18.19	3.5
20	33.75	4.25	23	24.5	20-2.12	29.5	9.75	20		6.25	20.2	0.5	8.25	20.25	20.19	3.62
24	41	5.5	27.25	29.5	20-2.62	35.5	11.5	24		8	24.25	0.5	10.5	24.25	24.19	4

All dimensions given in inches.
Dimensions and tolerances in accordance with ANSI B16.5.
Carbon steel flanges mechanical properties and chemistry conform to ASTM A105.
Flanges are furnished faced, drilled and spotfaced or backfaced.
Dimensions for Class 900 flanges, sizes NPS 1/2 through 2-1/2, are same as Class 1500 flanges.
*1/4 in. raised face included in dimensions Q, Y and YY.
**Bolt hole diameter 1/8 in. larger than bolt diameter.

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