Dimensions Ring-Joint Facings ASME B16.5 Pressure Class 400

OTHER PRESSURE CLASSES

150

300

400

600

900

1500

2500

Class 400 NPS	Groove No.	Pitch Dia P	Depth E Note (1)	Width F	Radius at bottom R
	R11	34.14	5.54	7.14	0.8
	R12	39.67	6.35	8.74	0.8
	R13	42.88	6.35	8.74	0.8
	R14	44.45	6.35	8.74	0.8
	R15	47.63	6.35	8.74	0.8
	R16	50.8	6.35	8.74	0.8
	R17	57.15	6.35	8.74	0.8
	R18	60.33	6.35	8.74	0.8
	R19	65.07	6.35	8.74	0.8
	R20	68.27	6.35	8.74	0.8
	R21	72.23	7.92	11.91	0.8
	R22	82.55	6.35	8.74	0.8
	R23	82.55	7.92	11.91	0.8
	R24	95.25	7.92	11.91	0.8
	R25	101.6	6.35	8.74	0.8
	R26	101.6	7.92	11.91	0.8
	R27	107.95	7.92	11.91	0.8
	R28	111.13	9.53	13.49	1.5
	R29	114.3	6.35	8.74	0.8
	R30	117.48	7.92	11.91	0.8
	R31	123.83	7.92	11.91	0.8
	R32	127	9.53	13.49	1.5
	R33	131.78	6.35	8.74	0.8
	R34	131.78	7.92	11.91	0.8
	R35	136.53	7.92	11.91	0.8
	R36	149.23	6.35	8.74	0.8
4	R37	149.23	7.92	11.91	0.8
	R38	157.18	11.13	16.66	1.5
	R39	161.93	7.92	11.91	0.8
	R40	171.45	6.35	8.74	0.8
5	R41	180.98	7.92	11.91	0.8
	R42	190.5	12.7	19.84	1.5
	R43	193.68	6.35	8.74	0.8
	R44	193.68	7.92	11.91	0.8
Class 400 NPS	Groove No.	Pitch Dia P	Depth E Note (1)	Width F	Radius at bottom R
6	R45	211.12	7.92	11.91	0.8
	R46	211.14	9.53	13.49	1.5
	R47	228.6	12.7	19.84	1.5
	R48	247.65	6.35	8.74	0.8
8	R49	269.88	7.92	11.91	0.8
	R50	269.88	11.13	16.66	1.5
	R51	279.4	14.27	23.01	1.5
	R52	304.8	6.35	8.74	0.8
10	R53	323.85	7.92	11.91	0.8
	R54	323.85	11.13	16.66	1.5
	R55	342.9	17.48	30.18	2.4
	R56	381	6.35	8.74	0.8
12	R57	381	7.92	11.91	0.8
	R58	381	14.27	23.01	1.5
	R59	396.88	6.35	8.74	0.8
	R60	406.4	17.48	33.32	2.4
14	R61	419.1	7.92	11.91	0.8
	R62	419.1	11.13	16.66	1.5
	R63	419.1	15.88	26.97	2.4
	R64	454.03	6.35	8.74	0.8
16	R65	469.9	7.92	11.91	0.8
	R66	469.9	11.13	16.66	1.5
	R67	469.9	17.48	30.18	2.4
	R68	517.53	6.35	8.74	0.8
18	R69	533.4	7.92	11.91	0.8
	R70	533.4	12.7	19.84	1.5
	R71	533.4	17.48	30.18	2.4
	R72	558.8	6.35	8.74	0.8
20	R73	584.2	9.53	13.49	1.5
	R74	584.2	12.7	19.84	1.5
	R75	584.2	17.48	33.32	2.4
	R76	673.1	6.35	8.74	0.8
24	R77	692.15	11.13	16.66	1.5
	R78	692.15	15.88	26.97	2.4
	R79	692.15	20.62	36.53	2.4

Notes..
(1) The height of the raised portion is equal to the depth of the groove dimension, E, but is not subjected to the tolerances for E. Former full-face contour may be used.
(2) For ring joints with lapped flanges in Classes 300 and 600, ring and groove number R30 is used instead of R31.

Diameter of Raised Portion, K
CL150 NPS	CL300 NPS	CL400 NPS	CL600 NPS	CL900 NPS	CL1500 NPS	CL2500 NPS
	51		51		60.5	65
	1/2		1/2		1/2	1/2
	63.5		63.5		66.5	73
	3/4		3/4		3/4	3/4
63.5	70		70		71.5	82.5
1	1		1		1	1
73	79.5		79.5		81	102
1.1/4	1.1/4		1.1/4		1.1/4	1.1/4
82.5	90.5		90.5		92	114
1.1/2	1.1/2		1.1/2		1.1/2	1.1/2
102	108		108		124	133
2	2		2		2	2
121	127		127		137	149
2.1/2	2.1/2		2.1/2		2.1/2	2.1/2
133	146		146	156	168	168
3	3		3	3	3	3
154	159		159
3.1/2	3.1/2		3.1/2
171	175	175	175	181	194	203
4	4	4	4	4	4	4
194	210	210	210	216	229	241
5	5	5	5	5	5	5
219	241	241	241	241	248	279
6	6	6	6	6	6	6
273	302	302	302	308	318	340
8	8	8	8	8	8	8
330	356	356	356	362	371	425
10	10	10	10	10	10	10
406	413	413	413	419	438	495
12	12	12	12	12	12	12
425	457	457	457	467	489
14	14	14	14	14	14
483	508	508	508	524	546
16	16	16	16	16	16
546	575	575	575	594	613
18	18	18	18	18	18
597	635	635	635	648	673
20	20	20	20	20	20
711	749	749	749	772	794
24	24	24	24	24	24

Approximate Distance Between Flanges, X
CL150 NPS	CL300 NPS	CL400 NPS	CL600 NPS	CL900 NPS	CL1500 NPS	CL2500 NPS
	3 1/2		3 1/2		4 1/2	4 1/2
	4 3/4		4 3/4		4 3/4	4 3/4
4 1	4 1		4 1		4 1	4 1
4 1.1/4	4 1.1/4		4 1.1/4		4 1.1/4	3 1.1/4
4 1.1/2	4 1.1/2		4 1.1/2		4 1.1/2	3 1.1/2
4 2	6 2		5 2		3 2	3 2
4 2.1/2	6 2.1/2		5 2.1/2		3 2.1/2	3 2.1/2
4 3	6 3		5 3	4 3	3 3	3 3
4 3.1/2	6 3.1/2		5 3.1/2
4 4	6 4	6 4	5 4	4 4	3 4	4 4
4 5	6 5	6 5	5 5	4 5	3 5	4 5
4 6	6 6	6 6	5 6	4 6	3 6	4 6
4 8	6 8	6 8	5 8	4 8	4 8	5 8
4 10	6 10	6 10	5 10	4 10	4 10	6 10
4 12	6 12	6 12	5 12	4 12	5 12	8 12
3 14	6 14	6 14	5 14	4 14	6 14
3 16	6 16	6 16	5 16	4 16	8 16
3 18	6 18	6 18	5 18	5 18	8 18
3 20	6 20	6 20	5 20	5 20	10 20
3 24	6 24	6 24	6 24	6 24	11 24

GENERAL NOTES..
(a) Dimensions are in millimeters unless otherwise indicated.
(b) Use Class 600 sizes NPS 1/2 to NPS 3.1/2 for Class 400.
(c) Use Class 1500 in sizes NPS 1/2 to NPS 2.1/2 for Class 900.
(d) Ring joint gasket materials shall conform to ASME B16.20.
(e) The edge (periphery) of each ring joint flange shall be marked with the letter R and the corresponding ring groove number.

NOTES..
(1) The height of the raised portion is equal to the depth of the groove dimension, E, but is not subjected to the tolerances for E. Former full-face contour may be used.
(2) For ring joints with lapped flanges in Classes 300 and 600, ring and groove number R30 is used instead of R31.

TOLERANCES..

E (depth) +0.4 -0.0

F (width) ±0.2

P (pitch diameter) ±0.13

R (radius at bottom)≤ 2 + 0.8 -0.0
> 2 ± 0.8, 23° (angle) ± 1/2°