Spiral Wound Gasket Bolt Torque Values Chart

When we install spiral wound gaskets, we need to know the bolt torque values for spiral wound gaskets. Here you will get the information about the recommended bolt torque values.

Bolting Recommendation

When utilizing torque wrenches, the use of suitable lubricants on the stud threads and nut bearing faces is recommended, like molybdenum di-sulfide or nickel powder anti-seize compounds.

We recommend a 4-stage tightening method as follows:.

1. Tighten the bolts at 30% of the final loading using the diametrical sequence.
2. 60% of the final load following diametrical sequence.
3. 100% of the final load following diametrical sequence.
4. 100% of final torque on adjacent bolts.

CG Spiral Wound Gasket Bolt Torque Value Chart

NPS	150#	150#	300#	300#	400#	400#	600#	600#	900#	900#	1500#	1500#	2500#	2500#
Inch	Min.	Max	Min.	Max	Min.	Max	Min.	Max	Min.	Max	Min.	Max	Min.	Max
1/2	30	40	30	40	30	40	30	40	70	120	70	120	50	100
3/4	30	40	60	70	60	70	60	70	70	120	70	120	70	120
1	30	40	60	70	60	70	60	70	110	190	110	190	110	160
1 1/4	30	40	60	70	60	70	60	70	110	190	135	190	210	250
1 1/2	30	60	100	120	100	120	100	120	170	290	200	290	310	350
2	60	90	60	70	60	70	60	70	110	190	130	190	220	250
2 1/2	60	110	100	120	100	120	100	120	170	290	190	290	300	360
3	90	120	100	120	100	120	100	120	140	230	265	360	460	500
3 1/2	60	90	100	120	160	190	170	210	–	–	–	–	–	–
4	70	120	100	140	160	200	190	240	255	420	415	520
5	100	160	110	160	210	260	280	360	360	600	585	800
6	130	200	110	160	190	240	260	330	300	500	530	680
8	180	200	180	260	310	400	400	510	485	800	845	1100
10	170	320	250	290	340	440	500	590	505	800	1565	2000
12	240	320	360	420	510	640	500	610	570	850
14	300	490	360	420	500	890	680	800	630	940
16	310	490	500	590	680	800	800	940	910	1290
18	500	710	500	680	680	810	1100	1290	1570	2340
20	430	710	500	740	800	940	1100	1290	1745	2570
24	620	1000	800	1030	1500	1750	2000	2340

Notes: Torque Values are in ft.-lbs., and assume Alloy Steel Bolts (A193 B7 w/ 2H Nuts) with oil/graphite lubrication

CGI Spiral Wound Gasket Bolt Torque Value Chart

NPS	150#	150#	300#	300#	400#	400#	600#	600#	900#	900#	1500#	1500#	2500#	2500#
Inch	Min.	Max	Min.	Max	Min.	Max	Min.	Max	Min.	Max	Min.	Max	Min.	Max
1/2	30	50	30	40	30	40	30	40	70	120	70	120	50	100
3/4	30	50	60	80	60	80	60	80	70	120	70	120	63	100
1	30	60	60	80	60	80	60	80	110	190	110	190	110	160
1 1/4	30	60	60	80	60	80	60	80	110	190	140	190	210	250
1 1/2	30	60	100	140	100	140	100	140	170	290	200	290	310	360
2	60	120	60	80	60	80	60	80	110	190	130	190	220	250
2 1/2	60	120	100	140	100	140	100	140	170	290	190	290	300	360
3	90	120	100	150	100	150	100	150	140	230	270	360	460	500
3 1/2	60	120	100	170	160	290	170	290
4	70	120	100	200	160	320	190	320	260	420	420	520	710	800
5	100	200	110	200	210	320	280	490	360	600	590	800	1280	1500
6	130	200	110	200	190	320	260	460	300	500	530	680	1870	2200
8	180	200	180	320	310	490	400	700	485	800	850	1100	1780	2200
10	170	320	250	460	360	710	500	800	505	800	1570	2000	3040	4400
12	240	320	360	700	510	1000	500	850	560	850	1500	2200	4610	5920
14	300	490	360	610	500	870	680	950	630	940	2120	3180
16	310	490	500	920	680	1250	800	1210	910	1290	2940	4400
18	490	710	500	1000	680	1340	1100	1790	1570	2340	3950	5920
20	430	710	500	1000	800	1430	1100	1640	1745	2570	5150	7720
24	620	1000	800	1600	1500	2270	2000	2670	2945	5140	8340	12500

Notes: Torque Values are in ft.-lbs., and assume Alloy Steel Bolts (A193 B7 w/ 2H Nuts) with oil/graphite lubrication