Dimension of Flanges to ASME / ANSI B 16.5-1

DIMENSION OF CLASS 150 FLANGES AS PER ANSI B 16.5
Nominal pipe size	flange dia	Dia of Bolt Circle	Dia of Bolt Holes D	No. of Holes	Thinkness of flange C	Dia of Hub E	Length through Hub			Dia of Bore		Dia of R/F R	Deoth of Socket
	O	A	D		C	E	S/W	W/N	L/J	S/W	L/J	R	F
15	88.9	60.3	15.9	4	11.1	30.2	15.9	47.6	15.9	22.3	22.9	34.9	9.5
20	98.4	69.8	15.9	4	12.7	38.1	15.9	52.4	15.9	27.7	28.2	42.9	11.1
25	107.9	79.4	15.9	4	14.3	49.2	17.5	55.6	17.5	34.5	35.0	50.8	12.7
32	117.5	88.9	15.9	4	15.9	58.7	20.6	57.1	20.6	43.2	43.7	63.5	14.3
40	127.0	98.4	15.9	4	17.5	65.1	22.2	61.9	22.2	49.5	50.0	73.0	15.9
50	152.4	120.6	19.0	4	19.0	77.8	25.4	63.5	25.4	62.0	62.5	92.1	17.5
65	177.8	139.7	19.0	4	22.2	90.5	28.6	69.8	28.6	74.7	75.4	104.8	19.0
80	190.5	152.4	19.0	4	23.8	107.9	30.2	69.8	30.2	90.7	91.4	127.0	20.6
100	228.6	190.5	19.0	8	23.8	134.9	33.3	76.2	33.3	116.1	116.8	157.2	23.8
125	254.0	215.9	22.2	8	23.8	163.5	36.5	88.9	36.5	143.8	144.5	185.7	23.8
150	279.4	241.3	22.2	8	25.4	192.1	39.7	88.9	39.7	170.7	171.4	215.9	27.0
200	342.9	298.4	22.2	8	28.6	246.1	44.4	101.6	44.4	221.5	222.2	269.9	31.7
250	406.4	361.9	25.4	12	30.2	304.8	49.2	101.6	49.2	276.3	277.4	323.8	33.3
300	482.6	431.8	25.4	12	31.8	365.4	55.6	114.3	55.6	327.1	328.2	381.0	39.7
350	533.4	476.2	28.6	12	34.9	400.0	57.1	127.0	79.4	359.1	360.2	412.7	41.3
400	596.9	539.7	28.6	16	36.5	457.2	63.5	127.0	87.3	410.5	411.2	469.9	44.4
450	635.0	577.8	31.6	16	39.7	504.8	68.3	139.7	96.8	461.8	462.3	533.4	19.2
500	698.5	635.0	31.6	20	42.9	558.8	73.0	144.5	103.2	513.1	514.3	584.2	54.0
600	812.8	749.3	34.9	20	47.6	663.6	82.5	152.4	111.1	615.9	615.9	692.1	63.5

DIMENSION OF CLASS 300 FLANGES AS PER ANSI B 16.5
Nominal pipe size	flange dia	Dia of Bolt Circle	Dia of Bolt Holes D	No. of Holes	Thinkness of flange C	Dia of Hub E	Length through Hub			Dia of Bore		Dia of R/F R	Deoth of Socket
	O	A	D		C	E	S/W	W/N	L/J	S/W	L/J	R	F
15	95.2	66.7	15.9	4	14.3	38.1
20	117.5	82.5	19.0	4	15.9	47.6
25	123.8	88.9	19.0	4	17.5	54.0
32	133.3	98.4	19.0	4	19.0	63.5
40	155.6	114.3	22.2	4	20.6	69.8
50	165.1	127.0	19.0	8	22.2	84.1
65	190.5	149.2	22.2	8	25.4	100.0
80	209.5	168.3	22.2	8	28.6	117.8
100	254.0	200.0	22.2	8	31.8	146.0
125	279.4	234.9	22.2	12	34.9	177.8
150	317.5	269.9	22.2	12	36.5	206.4
200	381.0	330.2	25.4	16	41.3	260.3
250	444.5	387.3	28.6	16	47.6	320.7
300	520.7	450.8	31.7	20	50.8	374.6
350	584.2	514.3	34.9	20	54.0	425.4
400	647.7	571.5	34.9	24	57.2	482.6
450	711.2	628.5	34.9	24	60.3	533.4
500	774.7	685.8	41.3	24	63.5	587.4
600	914.4	812.8	41.3	24	69.8	701.4

DIMENSION OF CLASS 600 FLANGES AS PER ANSI B 16.5
N.B	A	B	C	D	E	F	G	H	J	K	L	M	N	O	P	R	T	NO OF HOLES
15	95	14.3	6.4	35	22	38
20	117	15.9	6.4	43	25	48
25	124	17.5	6.4	51	27	54
32	133	20.6	6.4	64	29	64
40	156	22.2	6.4	73	32	70
50	165	25.4	6.4	92	37	84
65	190	28.6	6.4	105	41	100
80	210	31.8	6.4	127	46	117
90	229	34.9	6.4	140	49	133
100	273	38.1	6.4	157	54	152
125	330	44.4	6.4	186	60	189
150	356	47.6	6.4	216	67	222
200	419	55.6	6.4	270	76	273
250	508	63.5	6.4	324	86	343
300	559	66.7	6.4	381	92	400
350	603	69.8	6.4	413	94	432
400	686	76.2	6.4	470	106	495
450	743	82.6	6.4	533	117	546
500	813	88.9	6.4	584	122	610
600	940	101.6	6.4	692	140	718

DIMENSION OF CLASS 1500 FLANGES AS PER ANSI B 16.5
N.B	A	B	C	D	E	F	G	H	J	K	L	M	N	O	P	R	T	NO OF HOLES
15	121	22.2	6.4	35	32	38
20	130	25.4	6.4	43	35	44
25	149	28.6	6.4	51	41	52
32	159	28.6	6.4	64	41	64
40	178	31.8	6.4	73	44	70
50	216	38.1	6.4	92	57	105
65	244	41.3	6.4	105	64	124
80	267	47.6	6.4	127	73	133
100	311	54.0	6.4	157	91	162
125	325	73.0	6.4	186	105	197
150	394	82.6	6.4	216	119	229
200	483	92.1	6.4	270	143	292
250	584	108.0	6.4	324	159	368
300	673	123.8	6.4	381	181	451
350	749	133.4	6.4	413		495
400	826	146.1	6.4	470		552
450	914	161.9	6.4	533		597
500	984	178.0	6.4	584		641
600	1168	203.0	6.4	692		762