ASME/ANSI B16.5 Class 400 Flange Dimensions & Standards

CLASS 400			FLANGE THICKNESS			LTB				DRILLING DATA
NOMINAL PIPE SIZE		FLANGE OUTSIDE DIAMETER	THICKNESS OF FLANGE MIN	BOSSED LENGTH	WELD NECK LENGTH	LAP JOINT LENGTH	LONG WELD NECK LENGTH	PITCH CIRCLE DIAMETER	BOLT HOLE DIAMETER	NUMBER OF BOLT HOLES	NOMINAL PIPE SIZE
MM	INCH	OD	T & T1	L	L1	L2	L3	PCD	H	#	MM	INCH
15	1/2	95	14.3	29	59	22	229	66.7	16	4	15	1/2
20	3/4	115	15.9	32	64	25	229	82.6	20	4	20	3/4
25	1	125	17.5	34	69	27	229	88.9	20	4	25	1
32	1 1/4	135	20.7	36	74	29	229	98.4	20	4	32	1 1/4
40	1 1/2	155	22.3	39	77	32	229	114.3	22	4	40	1 1/2
50	2	165	25.4	44	80	37	229	127	20	8	50	2
65	2 1/2	190	28.6	48	86	41	229	149.2	22	8	65	2 1/2
80	3	210	31.8	53	90	46	229	168.3	22	8	80	3
90	3 1/2	230	35	56	93	49	229	184.2	26	8	90	3 1/2
100	4	255	35	59	96	51	229	200	26	8	100	4
125	5	280	38.1	61	109	54	305	235	26	8	125	5
150	6	320	41.3	69	115	57	305	269.9	30	12	150	6
200	8	380	47.7	75	124	68	305	330	30	12	200	8
250	10	445	54	80	131	102	305	387.5	32	16	250	10
300	12	520	57.2	86	144	108	305	450.8	35	16	300	12
350	14	585	60.4	91	156	117	305	514.4	35	20	350	14
400	16	650	63.5	101	159	127	305	571.5	38	20	400	16
450	18	710	66.7	105	172	137	305	628.6	38	24	450	18
500	20	775	69.9	109	175	146	305	685.8	42	24	500	20
600	24	915	76.2	121	182	159	305	812.8	48	24	600	24

NOTES:

(1) Schedule of weld neck to be advised.

(2) LTB and bore size or schedule to be specified at time of order

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ASME/ANSI B16.5 Class 400