bennypass.com - Torque Table for Class 150 Flange

Torque Table for Class 150 Flange

Flange Materials : ASTM A105, ASTM A182 grades F50 and F51, ASTM A350 grades LF2 and LF3, ASTM A694 grade F52
Bolting Materials : ASTM A193 grades B7 and B7M, ASTM A320 grades L7, L7M and L43.
Gasket Type : Graphite Tanged Gasket
Bolt Lubricant Molykote 1000 (µ = 0.11)

Size in Inch	Size in mm	No. of Bolt	Bolt Dia.	Thread Type	Bolt Stress lb/in2	Torque lbf.ft.	Torque Nm
1/2	15	4	½”	UNC	25,000	22	30
3/4	20	4	½”	UNC	30,000	26	36
1	35	4	½”	UNC	33,000	29	39
1 ½	40	4	½”	UNC	50,000	44	60
2	50	4	5/8”	UNC	50,000	86	117
3	80	4	5/8”	UNC	50,000	86	117
4	100	8	5/8”	UNC	40,000	69	93
6	150	8	¾”	UNC	45,000	137	185
8	200	8	¾”	UNC	45,000	137	185
10	250	12	7/8”	UNC	40,000	194	263
12	300	12	7/8”	UNC	40,000	194	263
14	350	12	1”	UN8	41,000	296	401
16	400	16	1”	UN8	40,000	289	392
18	450	16	1 1/8”	UN8	40,000	421	571
20	500	20	1 1/8”	UN8	40,000	421	571
24	600	20	1 ¼”	UN8	40,000	588	797

Below the table with diameter and Lengths of stud and bolt that are covered by flange standard ASME B16.5 & B16.47 1500 series. Proper installation of bolt and stud on the flange:

Class 150 Flange Stud Charts

bolts

Size in Inch	Size in mm	No of Bolts	Bolt Size UNC	RF Stud Length	ISO Stud Size	Machine Bolt Length
Class 150 Flange
1/2	15	4	1/2	55	M14	50
3/4	20	4	1/2	65	M14	50
1	25	4	1/2	65	M14	55
1 1/4	32	4	1/2	70	M14	55
1 1/2	40	4	1/2	70	M14d	65
2	50	4	5/8	85	M16	70
2 1/2	65	4	5/8	90	M16	75
3	80	4	5/8	90	M16	75
3 1/2	90	8	5/8	90	M16	75
4	100	8	5/8	90	M16	75
5	125	8	3/4	95	M20	85
6	150	8	3/4	100	M20	85
8	200	8	3/4	110	M20	90
10	250	12	7/8	115	M24	100
12	300	12	7/8	120	M24	100
14	350	12	1	135	M27	115
16	400	16	1	135	M27	115
18	450	16	1 1/8	145	M30	125
20	500	20	1 1/8	160	M30	140
24	600	20	1 1/4	170	M33	150

Torque Table for Class 150 Flange

Class 150 Flange Stud Charts

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