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RTJ gaskets bolt torque

Posted Time: 2022-08-02 12:17:54Author: Ring Type JointsSource: JayusealView:

RTJ gaskets bolt torque values charts
Recommended minimum Torque Values are in N-m.
Torque values are applicable for Bolt Materials - standard ASTM A193 B7, B16 & ASTM A320 L7.

RTJ ring type joint gaskets bolt torque values chart

Recommended Bolt Torque Requirements for Class 150 RTJ gaskets

Flange NPS	No of Bolts	Bolt size	Bolt Stress (MPa)	Torque N-m μ=0.09 Copperslip	Torque N-m μ=0.14 Chesterton Nickel	Torque N-m μ=0.225 Unlubricated
½''	4	½	276	40	59	90
¾''	4	½	276	40	59	90
1''	4	½	276	40	59	90
1¼''	4	½	276	40	59	90
1½''	4	½	276	40	56	90
2''	4	⅝	276	79	116	178
2½''	4	⅝	276	79	116	178
3''	4	⅝	276	79	116	178
4''	8	⅝	276	79	116	178
5''	8	¾	276	139	203	313
6''	8	¾	276	139	203	313
8''	8	¾	276	139	203	313
10''	12	⅞	276	221	325	502
12''	12	⅞	276	221	325	502
14''	12	1	276	330	485	748
16''	16	1	276	330	485	748
18''	16	1 ⅛	276	479	708	1098
20''	20	1 ⅛	276	479	708	1098
24''	20	1 ¼	276	668	992	1543

Bolt Torque Requirements Value for Class 150 RTJ Ring Type Joints

Recommended Bolt Torque Requirements for Class 300 RTJ Gaskets

Flange NPS	No of Bolts	Bolt size	Bolt Stress (MPa)	Torque N-m μ=0.09 Copperslip	Torque N-m μ=0.14 Chesterton Nickel	Torque N-m μ=0.225 Unlubricated
½''	4	½	276	40	59	90
¾''	4	⅝	276	79	116	178
1''	4	⅝	276	79	116	178
1¼''	4	⅝	276	79	116	178
1½''	4	¾	276	139	203	313
2''	8	⅝	276	79	116	178
2½''	8	¾	276	139	203	313
3''	8	¾	276	139	203	313
4''	8	¾	276	139	203	313
5''	8	¾	310	156	229	352
6''	12	¾	310	156	229	352
8''	12	⅞	310	249	366	565
10''	16	1	276	330	485	748
12''	16	1 ⅛	276	479	708	1098
14''	20	1 ⅛	276	479	708	1098
16''	20	1 ¼	276	668	992	1543
18''	24	1 ¼	276	668	992	1543
20''	24	1 ¼	310	752	1116	1736
24''	24	1 ½	310	1329	1988	3108

Recommended Bolt Torque value for Class 600 RTJ gaskets

Flange NPS	No of Bolts	Bolt size	Bolt Stress (MPa)	Torque N-m μ=0.09 Copperslip	Torque N-m μ=0.14 Chesterton Nickel	Torque N-m μ=0.225 Unlubricated
1/2''	4	1/2	276	40	59	90
3/4''	4	5/8	276	79	116	178
1''	4	5/8	276	79	116	178
1 3/4''	4	5/8	310	89	130	200
1 1/2''	4	3/4	276	139	203	313
2''	8	5/8	310	89	130	200
2 1/2''	8	3/4	276	139	203	313
3''	8	3/4	310	156	229	352
4''	8	7/8	310	249	366	565
5''	8	1	310	371	545	842
6''	12	1	310	371	545	842
8''	12	1 1/8	310	539	797	1235
10''	16	1 1/4	310	752	1116	1736
12''	20	1 1/4	310	752	1116	1736
14''	20	1 3/8	310	1014	1511	2356
16''	20	1 1/2	310	1329	1988	3108
18''	20	1 5/8	310	1704	2555	4002
20''	24	1 5/8	310	1704	2555	4002
24''	24	1 7/8	310	2656	4000	6286

Recommended Bolt Torque value for Class 900 RTJ Gaskets

Flange NPS	No of Bolts	Bolt size	Bolt Stress (MPa)	Torque N-m μ=0.09 Copperslip	Torque N-m μ=0.14 Chesterton Nickel	Torque N-m μ=0.225 Unlubricated
1/2''	4	3/4	276	139	203	313
3/4''	4	3/4	276	139	203	313
1''	4	7/8	276	221	325	502
1 3/4''	4	7/8	276	221	325	502
1 1/2''	4	1	276	330	485	748
2''	8	7/8	276	221	325	502
2 1/2''	8	1	276	330	485	748
3''	8	7/8	310	249	366	565
4''	8	1 1/8	310	539	797	1235
5''	8	1 1/4	310	752	1116	1736
6''	12	1 1/8	310	539	797	1235
8''	12	1 3/8	310	1014	1511	2356
12''	20	1 3/8	310	1014	1511	2356
14''	20	1 1/2	345	1477	2209	3453
16''	20	1 5/8	345	1893	2839	4447
18''	20	1 7/8	345	2951	4444	6984
20''	20	2	345	3599	5430	8545
24''	20	2 1/2	310	6410	9728	15369

RTJ gaskets torque value as ASTM A193 B7, B16 & ASTM A320 L7

Recommended Bolt Torque Requirements for Class 1500 RTJ Ring Joint Gaskets

Flange NPS	No of Bolts	Bolt size	Bolt Stress (MPa)	Torque N-m μ=0.09 Copperslip	Torque N-m μ=0.14 Chesterton Nickel	Torque N-m μ=0.225 Unlubricated
½''	4	¾	276	139	203	313
¾''	4	¾	310	156	209	352
1''	4	⅞	310	249	366	565
1¼''	4	⅞	310	249	366	565
1½''	4	1	310	371	545	842
2½''	8	1	310	371	545	842
3''	8	1 ⅛	345	599	885	1372
4''	8	1 ¼	345	835	1240	1929
5''	8	1 ½	345	1477	2209	3453
6''	12	1 ⅜	310	1014	1511	2356
8''	12	1 ⅝	345	1893	2839	4447
10''	12	1 ⅞	345	2951	4444	6984
12''	16	2	345	3599	5430	8545
14''	16	2 ¼	345	5161	7813	12321
16''	16	2 ½	345	7122	10809	17077
18''	16	2 ¾	345	9547	14520	22974
20''	16	3	345	12431	18940	30005
24''	16	3 ½	345	19888	30387	48235

Recommended Bolt Torque Requirements for Class 2500 RTJ Ring Joint Gaskets

Flange NPS	No of Bolts	Bolt size	Bolt Stress (MPa)	Torque N-m μ=0.09 Copperslip	Torque N-m μ=0.14 Chesterton Nickel	Torque N-m μ=0.225 Unlubricated
½''	4	¾	345	173	254	392
¾''	4	¾	345	173	254	392
1''	4	⅞	379	304	447	691
1¼''	4	1	379	453	666	1029
1½''	4	1 ⅛	379	659	974	1510
2''	8	1	379	453	666	1029
2½''	8	1 ⅛	379	659	974	1510
3''	8	1 ¼	345	835	1240	1929
4''	8	1 ½	379	1625	2430	3798
5''	8	1 ¾	379	2618	3935	6174
6''	8	2	379	3958	5973	9399
8''	12	2	379	3958	5973	9399
10''	12	2 ½	345	7122	10809	17077
12''	12	2 ¾	379	10502	15972	25272

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