ASME B16.5 Class 2500 Lap Joint Flange

Technical Drawing

Dimensions of 2500# Lap Joint Flanges

NPS	D	B	X	K
1/2	135	22.9	43	88.9
3/4	140	28.2	51	95.2
1	160	34.9	57	108.0
1-1/4	185	43.7	73	130.2
1-1/2	205	50.0	79	146.0
2	235	62.5	95	171.4
2-1/2	265	75.4	114	196.8
3	305	91.4	133	228.6
4	355	116.8	165	273.0
5	420	144.4	203	323.8
6	485	171.4	235	368.3
8	550	222.2	305	438.2
10	675	277.4	375	539.8
12	760	328.2	441	619.1

*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	7/8	3/4	-
3/4	4	7/8	3/4	-
1	4	1	7/8	-
1-1/4	4	1-1/8	1	-
1-1/2	4	1-1/4	1-1/8	-
2	8	1-1/8	1	-
2-1/2	8	1-1/4	1-1/8	-
3	8	1-3/8	1-1/4	-
4	8	1-5/8	1-1/2	-
5	8	1-7/8	1-3/4	-
6	8	2-1/8	2	-
8	12	2-1/8	2	-
10	12	2-5/8	2-1/2	-
12	12	2-7/8	2-3/4	-

*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	40	30.2	3	2.92
3/4	43	31.8	3	3.40
1	48	35.0	3	4.77
1-1/4	52	38.1	5	7.08
1-1/2	60	44.5	6	9.93
2	70	50.9	8	14.7
2-1/2	79	57.2	8	21.3
3	92	66.7	10	32.3
4	108	76.2	11	52.5
5	130	92.1	11	82.6
6	152	108.0	13	127
8	178	127.0	13	186
10	229	165.1	13	352
12	254	184.2	13	501

* Y: length through hub;  T: minimum thickness of 2500LB 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.