Gaskets,Packings, & Seals Inc.  P.O. Box 509  Parkersburg, WV 26102  Tel: 866-458-7325 or 304-422-3880 Fax: 304-422-9476

Garlock Suggested Bolt Torque Values 150# Flange
for compressed sheet, GYLON and GRAPH-LOCK
for ASME B 16.5 Class 150# RF Flanges with A193GrB7 Bolts
Nom.		Size of	Internal	Minimum	Preferred
Pipe Size	No. of	Bolts	Pressure	Torque	Torque
(Inches)	Bolts	(Inches)	(psig)	(ft./lbs.)	(ft./lbs.)
0.5	4	0.50	300	9	28
0.75	4	0.50	300	13	40
1	4	0.50	300	17	53
1.25	4	0.50	300	26	60
1.5	4	0.50	300	35	60
2	4	0.63	300	69	120
2.5	4	0.63	300	81	120
3	4	0.63	300	119	120
3.5	8	0.63	300	66	120
4	8	0.63	300	84	120
5	8	0.75	300	117	200
6	8	0.75	300	148	200
8	8	0.75	300	200	200
10	12	0.88	300	188	320
12	12	0.88	300	250	320
14	12	1.00	300	317	490
15	16	1.00	300	301	490
18	16	1.13	300	448	710
20	20	1.13	300	395	710
24	20	1.25	300	563	1000