bennypass.com - Torque Table for Class 300 Flange

Torque Table for Class 300 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	40,000	35	47
3/4	20	4	½”	UNC	40,000	69	93
1	35	4	½”	UNC	40,000	69	93
1 ½	40	4	½”	UNC	31,000	94	128
2	50	4	5/8”	UNC	37,000	64	87
3	80	4	5/8”	UNC	42,000	127	173
4	100	8	5/8”	UNC	45,000	137	185
6	150	8	¾”	UNC	45,000	137	185
8	200	8	¾”	UNC	45,000	218	296
10	250	12	7/8”	UNC	45,000	325	441
12	300	12	7/8”	UNC	43,000	453	614
14	350	12	1”	UN8	45,000	474	643
16	400	16	1”	UN8	31,000	456	618
18	450	16	1 1/8”	UN8	34,000	500	678
20	500	20	1 1/8”	UN8	40,000	588	797
24	600	20	1 ¼”	UN8	31,000	809	1097

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 300 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 300 Flange
1/2	15	4	1/2	65	M14	55
3/4	20	4	5/8	75	M16	65
1	25	4	5/8	75	M16	65
1 1/4	32	4	5/8	85	M16	70
1 1/2	40	4	3/4	90	M20	75
2	50	8	5/8	90	M16	75
2 1/2	65	8	3/4	100	M20	85
3	80	8	3/4	110	M20	90
3 1/2	90	8	3/4	110	M20	95
4	100	8	3/4	115	M20	95
5	125	8	3/4	120	M20	110
6	150	12	3/4	120	M20	110
8	200	12	7/8	140	M24	120
10	250	16	1	160	M27	140
12	300	16	1 1/8	170	M30	145
14	350	20	1 1/8	180	M30	160
16	400	20	1 1/4	190	M33	165
18	450	24	1 1/4	195	M33	170
20	500	24	1 1/4	205	M33	185
24	600	24	1 1/2	230	M39	205

Torque Table for Class 300 Flange

Class 300 Flange Stud Charts

About

Our Services

Marketing Materials

Marketing Materials1