AP16A Flange

API 6A Type 6B Flanges

API 6A Type 6B Flanges

Class	Size	OD	K	T	X	BC	Num of Bolts	Bolt Hole Dia	R/RX Ring Num
2,000 psi (130 bar) Working Pressure	2-1/6	6.50	4.25	1.31	3.31	5.00	8	0.75	23
	2-9/16	7.50	5.00	1.44	3.94	5.88	8	0.88	26
	3-1/8	8.25	5.75	1.56	4.62	6.62	8	0.88	31
	4-1/16	10.75	6.88	1.81	6.00	8.50	8	1.00	37
	5-1/8	13.00	8.25	2.06	7.44	10.50	8	1.12	41
	7-1/16	14.00	9.50	2.19	8.75	11.50	12	1.12	45
	9	16.50	11.88	2.50	10.75	13.75	12	1.25	49
	11	20.00	14.00	2.81	13.50	17.00	16	1.38	53
	13-5/8	22.00	16.25	2.94	15.75	19.25	20	1.38	57
	16-3/4	27.00	20.00	3.31	19.50	23.75	20	1.62	65
	21-1/4	32.00	25.00	3.88	24.00	28.50	24	1.75	73
Class	Size	OD	K	T	X	BC	Num of Bolts	Bolt Hole Dia	R/RX Ring Num
3,000 psi (207 bar) Working Pressure	2-1/6	8.50	4.88	1.81	4.12	6.50	8	1.00	24
	2-9/16	9.62	5.38	1.94	4.88	7.50	8	1.12	27
	3-1/8	9.50	6.12	1.81	5.00	7.50	8	1.00	31
	4-1/16	11.50	7.12	2.06	6.25	9.25	8	1.25	37
	5-1/8	13.75	8.50	2.31	7.50	11.00	8	1.38	41
	7-1/16	15.00	9.50	2.50	9.25	12.50	12	1.25	45
	9	18.50	12.12	2.81	11.75	15.50	12	1.50	49
	11	21.50	14.25	3.06	14.50	18.50	16	1.50	53
	13-5/8	24.00	16.50	3.44	16.50	21.00	20	1.50	57
	16-3/4	27.75	20.62	3.94	20.00	24.25	20	1.75	66
	20-3/4	33.75	25.50	4.75	24.50	29.50	20	2.12	74
Class	Size	OD	K	T	X	BC	Num of Bolts	Bolt Hole Dia	R/RX Ring Num
5,000 psi (345 bar) Working Pressure	2-1/16	8.50	4.88	1.81	4.12	6.50	8	1.00	24
	2-9/16	9.62	5.38	1.94	4.88	7.50	8	1.12	27
	3-1/8	10.50	6.62	2.19	5.25	8.00	8	1.25	35
	4-1/16	12.25	7.62	2.44	6.38	9.50	8	1.38	39
	5-1/8	14.75	9.00	3.19	7.75	11.50	8	1.62	44
	7-1/16	15.50	9.75	3.62	9.00	12.50	12	1.50	46
	9	19.00	12.50	4.06	11.50	15.50	12	1.75	50
	11	23.00	14.63	4.69	14.50	19.00	12	2.00	54

API 6A Type 6BX Flanges

API 6A Type 6B Flanges

Class	Size	OD	K	T	J	BC	Num of Bolts	Bolt Hole Dia	BX Ring Num
2,000 psi (130 bar) Working Pressure	26-3/4	41.00	31.69	4.97	32.91	37.50	20	1.88	167
2,000 psi (130 bar) Working Pressure	30	44.19	35.75	5.28	36.69	40.94	32	1.75	303
Class	Size	OD	K	T	J	BC	Num of Bolts	Bolt Hole Dia	BX Ring Num
3,000 psi (207 bar) Working Pressure	26-3/4	43.38	32.75	6.34	34.25	39.38	24	2.12	168
3,000 psi (207 bar) Working Pressure	30	46.68	36.31	6.58	38.19	42.94	32	2.00	303
Class	Size	OD	K	T	J	BC	Num of Bolts	Bolt Hole Dia	BX Ring Num
5,000 psi (345 bar) Working Pressure	13-5/8	26.50	18.00	4.44	18.94	23.25	16	1.75	160
	16-3/4	30.38	21.06	5.13	21.88	26.62	16	2.00	162
	18-3/4	35.62	24.69	6.53	26.56	31.62	20	2.12	163
	21-1/4	39.00	27.62	7.12	29.88	34.88	24	2.12	165
Class	Size	OD	K	T	J	BC	Num of Bolts	Bolt Hole Dia	BX Ring Num
10,000 psi (690 bar) Working Pressure	1-13/16	7.38	4.12	1.66	3.50	5.75	8	0.88	151
	2-1/16	7.88	4.38	1.73	3.94	6.25	8	0.88	152
	2-9/16	9.12	5.19	2.02	4.75	7.25	8	1.00	153
	3-1/16	10.62	6.00	2.30	5.59	8.50	8	1.12	154
	4-1/16	12.44	7.28	2.77	7.19	10.19	8	1.25	155
	5-1/8	14.06	8.69	3.12	8.81	11.81	12	1.25	169
	7-1/16	18.88	11.88	4.06	11.88	15.88	12	1.62	156
	9	21.75	14.12	4.88	14.75	18.75	16	1.62	157
	11	25.75	16.88	5.56	17.75	22.25	16	1.88	158
	13-5/8	30.25	20.38	6.62	21.75	26.50	20	2.00	159
	16-3/4	34.31	22.69	6.62	25.81	30.56	24	2.00	162
	18-3/4	40.94	27.44	8.78	29.62	36.44	24	2.38	164
	21-1/4	45.00	30.75	9.50	33.38	40.25	24	2.62	166
Class	Size	OD	K	T	J	BC	Num of Bolts	Bolt Hole Dia	BX Ring Num
15,000 psi (1035 bar) Working Pressure	1-13/16	8.19	4.19	1.78	3.84	6.31	8	1.00	151
	2-1/16	8.75	4.50	2.00	4.38	6.88	8	1.00	152
	2-9/16	10.00	5.25	2.25	5.06	7.88	8	1.12	153
	3-1/16	11.31	6.06	2.53	6.06	9.06	8	1.25	154
	4-1/16	14.19	7.62	3.09	7.69	11.44	8	1.50	155
	5-1/8	16.50	8.88	3.88	9.62	13.50	12	1.62	169
	7-1/16	19.88	12.00	4.69	12.81	16.88	16	1.62	156
	9	25.50	15.00	5.75	17.00	21.75	16	2.00	157
	11	32.00	17.88	7.38	23.00	28.00	20	2.12	158
	13-5/8	34.88	21.31	8.06	23.44	30.38	20	2.38	159
	18-3/4	45.75	28.44	10.06	32.00	40.00	20	3.12	164
Class	Size	OD	K	T	J	BC	Num of Bolts	Bolt Hole Dia	BX Ring Num
20,000 psi (1380 bar) Working Pressure	1-13/16	10.12	4.62	2.50	5.25	8.00	8	1.12	151
	2-1/16	11.31	5.19	2.81	6.06	9.06	8	1.25	152
	2-9/16	12.81	5.94	3.12	6.81	10.31	8	1.38	153
	3-1/16	14.06	6.75	3.38	7.56	11.31	8	1.50	154
	4-1/16	17.56	8.62	4.19	9.56	14.06	8	1.88	155
	7-1/16	25.81	13.88	6.50	15.19	21.81	16	2.12	156
	9	31.69	17.38	8.06	18.94	27.00	16	2.62	157
	11	34.75	19.88	8.81	22.31	29.50	16	2.88	158
	13-5/8	45.75	24.19	11.50	27.31	40.00	20	3.12	159