Dimensions Ring Joint Facings

Ring Type Joint Flange is a method of ensuring leak proof flange connection at high pressures. A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal. 

This jointing method can be employed on Weld Neck, Slip-on and Blind Flange.

Dimensions Ring Joint Facings

Nominal Size							Groove Dimensions					Diameter of Raised Portion, K
Class 150 NPS	Class 300 NPS	Class 400 NPS	Class 600 NPS	Class 900 NPS	Class 1500 NPS	Class 2500 NPS	Groove Number	Pitch Diameter, P	Depth, E	Width, F	Radius at Bottom, R	Class 150 NPS	Class 300,  600 NPS	Class 900 NPS	Class 1500 NPS	Class 2500 NPS
_	1/2	_	1/2	_	_	_	R11	34.14	5.54	7.14	0.8		51.0
_	_	_	_	_	1/2	_	R12	39.67	6.35	8.74	0.8				60.5
_	3/4	_	3/4	_	_	1/2	R13	42.88	6.35	8.74	0.8		63.5			65.0
_	_	_	_	_	3/4	_	R14	44.45	6.35	8.74	0.8				66.5
1	_	_	_	_	_	_	R15	47.63	6.35	8.74	0.8	63.5
	1	_	1	_	1	3/4	R16	50.80	6.35	8.74	0.8		70.0		71.5	73.0
1 1/4	_	_	_	_	_	_	R17	57.15	6.35	8.74	0.8	73.0
	1 1/4	_	1 1/4	_	1 1/4	1	R18	60.33	6.35	8.74	0.8		79.5		81.0	82.5
1 1/2	_	_	_	_	_	_	R19	65.07	6.35	8.74	0.8	82.5
_	1 1/2	_	1 1/2	_	1 1/2	_	R20	68.27	6.35	8.74	0.8		90.5		92.0
_	_	_	_	_	_	1 1/4	R21	72.23	7.92	11.91	0.8					102.0
2	_	_	_	_	_	_	R22	82.55	6.35	8.74	0.8	102.0
_	2	_	2	_	_	1 1/2	R23	82.55	7.92	11.91	0.8		108.0			114.0
_	_	_	_	_	2	_	R24	95.25	7.92	11.91	0.8				124.0
2 1/2	_	_	_	_	_	_	R25	101.60	6.35	8.74	0.8	121.0
_	2 1/2	_	2 1/2	_	_	2	R26	101.60	7.92	11.91	0.8		127.0			133.0
_	_	_	_	_	2 1/2	_	R27	107.95	7.92	11.91	0.8				137.0
_	_	_	_	_	_	2 1/2	R28	111.13	9.53	13.49	0.8					149.0
3	_	_	_	_	_	_	R29	114.30	6.35	8.74	0.8	133.0
_	(2)	_	(2)	_	_	_	R30	117.48	7.92	11.91	0.8
_	3 (2)	_	3 (2)	3	_	_	R31	123.83	7.92	11.91	0.8		146.0	156.0
_	_	_	_	_	_	3	R32	127.00	9.53	13.49	1.5					168.0
3 1/2	_	_	_	_	_	_	R33	131.78	6.35	8.74	0.8	154.0
_	3 1/2	_	3 1/2	_	_	_	R34	131.78	7.92	11.91	0.8		159.0
_	_	_	_	_	3	_	R35	136.53	7.92	11.91	0.8				168.0
4	_	_	_	_	_	_	R36	149.23	6.35	8.74	0.8	171.0
_	4	4	4	4	_	_	R37	149.23	7.92	11.91	0.8		175.0	181.0
_	_	_	_	_	_	4	R38	157.18	11.13	16.66	1.5					203.0
_	_	_	_	_	4	_	R39	161.93	7.92	11.91	0.8				194.0
5	_	_	_	_	_	_	R40	171.45	6.35	8.74	0.8	194.0
_	5	5	5	5	_	_	R41	180.98	7.92	11.91	0.8		210.0	216.0
_	_	_	_	_	_	5	R42	190.50	12.70	19.84	1.5					241.0
6	_	_	_	_	_	_	R43	193.68	6.35	8.74	0.8	219.0
_	_	_	_	_	5	_	R44	193.68	7.92	11.91	0.8				229.0
_	6	6	6	6	_	_	R45	211.12	7.92	11.91	0.8		241.0	241.0
_	_	_	_	_	6	_	R46	211.14	9.53	13.49	1.5				248.0
_	_	_	_	_	_	6	R47	228.60	12.70	19.84	1.5					279.0
8	_	_	_	_	_	_	R48	247.65	6.35	8.74	0.8	273.0
_	8	8	8	8	_	_	R49	269.88	7.92	11.91	0.8		302.0	308.0
_	_	_	_	_	8	_	R50	269.88	11.13	16.66	1.5		_	_	318.0	_
_	_	_	_	_	_	8	R51	279.40	14.27	23.01	1.5		_	_	_	340.0
10	_	_	_	_	_	_	R52	304.80	6.35	8.74	0.8	330.0	_	_	_	_
_	10	10	10	10	_	_	R53	323.85	7.92	11.91	0.8		356.0	362.0	_	_
_	_	_	_	_	10	_	R54	323.85	11.13