ASME B16.5 Class 1500 Lap Joint Flange

Technical Drawing

Dimensions of 1500# Lap Joint Flanges

NPS	D	B	X	K
1/2	120	22.9	38	82.6
3/4	130	28.2	44	88.9
1	150	34.9	52	101.6
1-1/4	160	43.7	64	111.1
1-1/2	180	50.0	70	123.8
2	215	62.5	105	165.1
2-1/2	245	75.4	124	190.5
3	265	91.4	133	203.2
4	310	116.8	162	241.3
5	375	144.4	197	292.1
6	395	171.4	229	317.5
8	485	222.2	292	393.7
10	585	277.4	368	482.6
12	675	328.2	451	571.5
14	750	360.2	495	635.0
16	825	411.2	552	704.8
18	915	462.3	597	774.7
20	985	514.4	641	831.8
24	1170	616.0	762	990.6

*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	7/8	-
1-1/2	4	1-1/8	1	-
2	8	1	7/8	-
2-1/2	8	1-1/8	1	-
3	8	1-1/4	1-1/8	-
4	8	1-3/8	1-1/4	-
5	8	1-5/8	1-1/2	-
6	12	1-1/2	1-3/8	-
8	12	1-3/4	1-5/8	-
10	12	2	1-7/8	-
12	16	2-1/8	2	-
14	16	2-3/8	2-1/4	-
16	16	2-5/8	2-1/2	-
18	16	2-7/8	2-3/4	-
20	16	3-1/8	3	-
24	16	3-5/8	3-1/2	-

*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	32	22.3	3	1.71
3/4	35	25.4	3	2.30
1	41	28.6	3	3.40
1-1/4	41	28.6	5	3.85
1-1/2	44	31.8	6	5.28
2	57	38.1	8	9.78
2-1/2	64	41.3	8	13.6
3	73	47.7	10	17.8
4	90	54.0	11	27.5
5	105	73.1	11	51.5
6	119	82.6	13	62.0
8	143	92.1	13	105
10	178	108.0	13	179
12	219	123.9	13	269
14	241	133.4	13	365
16	260	146.1	13	459
18	276	162.0	13	598
20	292	177.8	13	712
24	330	203.2	13	1090

* Y: length through hub;  T: minimum thickness of 1500LB 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.