ANSI 150 LB Flanges

Nominal Pipe Size		Diameter of Studs		No. of Studs	Stud Bolt Length
					Raised Face		Ring Joint
Inches	MM	Inches	MM		Inches	MM	Inches	MM
1/2	12.70	1/2	12.70	4	2-1/4	57.15
3/4	19.05	1/2	12.70	4	2-1/2	63.50
1	25.40	1/2	12.70	4	2-1/2	63.50	3	76.20
1-1/4	31.75	1/2	12.70	4	2-3/4	69.85	3-1/4	82.55
1-1/2	38.10	1/2	12.70	4	2-3/4	69.85	3-1/4	82.55
2	50.80	5/8	15.88	4	3-1/4	82.55	3-3/4	95.25
2-1/2	63.50	5/8	15.88	4	3-1/2	88.90	4	101.60
3	76.20	5/8	15.88	4	3-1/2	88.90	4-1/4	107.95
3-1/2	88.90	5/8	15.88	8	3-1/2	88.90	4-1/4	107.95
4	101.60	5/8	15.88	8	3-1/2	88.90	4-1/4	107.95
5	127.00	3/4	19.05	8	3-3/4	95.25	4-1/2	114.30
6	152.40	3/4	19.05	8	4	101.60	4-1/2	114.30
8	203.20	3/4	19.05	8	4-1/4	107.95	4-3/4	120.65
10	254.00	7/8	22.23	12	4-3/4	120.65	5-1/4	133.35
12	304.80	7/8	22.23	12	4-3/4	120.65	5-1/2	139.70
14	355.60	1	25.40	12	5-1/4	133.35	6	152.40
16	406.40	1	25.40	16	5-1/2	139.70	6	152.40
18	457.20	1-1/8	28.58	16	6	152.40	6-1/2	165.10
20	508.00	1-1/8	28.58	20	6-1/4	158.75	7	177.80
22	558.80	1-1/4	31.75	20	6-1/2	165.10	7-1/4	184.15
24	609.60	1-1/4	31.75	20	7	177.80	7-3/4	196.85