ASME B16.5 Class 600 Lap Joint Flange

Technical Drawing

Dimensions of 600# Lap Joint Flanges

NPS	D	B	X	K
1/2	95	22.9	38	66.7
3/4	115	28.2	48	82.6
1	125	34.9	54	88.9
1-1/4	135	43.7	64	98.4
1-1/2	155	50.0	70	114.3
2	165	62.5	84	127.0
2-1/2	190	75.4	100	149.2
3	210	91.4	117	168.3
3-1/2	230	104.1	133	184.2
4	275	116.8	152	215.9
5	330	144.4	189	266.7
6	355	171.4	222	292.1
8	420	222.2	273	349.2
10	510	277.4	343	431.8
12	560	328.2	400	489.0
14	605	360.2	432	527.0
16	685	411.2	495	603.2
18	745	462.3	546	654.0
20	815	514.4	610	723.9
22	870	565.2	663	777.7
24	940	616.0	718	838.2

*D: outside diameter of flange; K: diameter of bolt circle; B: minimum bore diameter; X: diameter of hub at base; All units are mm.

NPS	n	d	l	L
1/2	4	5/8	1/2	-
3/4	4	3/4	5/8	-
1	4	3/4	5/8	-
1-1/4	4	3/4	5/8	-
1-1/2	4	7/8	3/4	-
2	8	3/4	5/8	-
2-1/2	8	7/8	3/4	-
3	8	7/8	3/4	-
3-1/2	8	1	7/8	-
4	8	1	7/8	-
5	8	1-1/8	1	-
6	12	1-1/8	1	-
8	12	1-1/4	1-1/8	-
10	16	1-3/8	1-1/4	-
12	20	1-3/8	1-1/4	-
14	20	1-1/2	1-3/8	-
16	20	1-5/8	1-1/2	-
18	20	1-3/4	1-5/8	-
20	24	1-3/4	1-5/8	-
22	24	1-7/8	1-3/4	-
24	24	2	1-7/8	-

*n: number of bolts; d: diameter of bolt holes; l: diameter of bolts; L: length of stud bolt, calculated according to Non-mandatory Appendix C; All units are mm except that d and l are provided in inch.

NPS	Y	T	r	Weight
1/2	22	14.3	3	0.72
3/4	25	15.9	3	1.25
1	27	17.5	3	1.50
1-1/4	29	20.7	5	2.00
1-1/2	32	22.3	6	2.92
2	37	25.4	8	3.55
2-1/2	41	28.6	8	5.23
3	46	31.8	10	6.95
3-1/2	49	35.0	10	8.78
4	54	35.0	11	14.4
5	60	38.1	11	24.3
6	67	41.3	13	28.5
8	76	47.7	13	43.1
10	111	54.0	13	70.5
12	117	57.2	13	86.1
14	127	60.4	13	100
16	140	63.5	13	145
18	152	66.7	13	177
20	165	69.9	13	225
22	175	73.1	13	…
24	184	76.2	13	318

* Y: length through hub;  T: minimum thickness of 600LB lap joint flange; r: corner bore radius of lapped flange and pipe; Weight: approximate weights/masses of the flange; All units are in mm except that weights are in kg.

ASME B16.5 Lap Joint Flanges, Classes
150#	300#	400#	600#
900#	1500#	2500#	-

*Click to view the dimensions and weights of lap joint flanges of each pressure rating.