2) When using a torque wrench, use the figures in Table 2. These torques are used when a particularly small range of tightening torque is needed, Table 2 Unit: kgm S43C, SCM 3H, equivalent, or higher Range Target Reference Tension load (kg) 6 1.2 - 1.5 1.35 1150 8 2.8 - 3.5 3.2 2175 IO 6 - 7.5 6.7 3355 12 10 - 12.5 11.5 4865 14 16 - 20.0 18 6715 16 25 - 31.5 28.5 9350 18 I 35 - 43.5 I 39 I 11200 I 50 - 62.0 I 22 67.5 - 84.5 76 18000 24 84 - 105 94.5 20600 30 155 -195 175 30100 27 120 -150 135 26000 33 200 - 250 225 35800 36 250 -310 280 40700 39 295 -370 335 45200 2.
Tightening torque for pipe threads The tightening torques for pipe threads of nominal size PT1/8 - PTI, PSI/S - PSI are according to this standard. Applicable range: Tightening torque: However, this table does not apply if torque is separately specified. 1) If the material of the male screw is SS41.FC.SGP. the tightening torque is as in Table 1. Table 1 Unit: kgm Nominal Steel Cast iron Light alloy II8 0.4 - 0.7 0.3 - 0.6 0.2 - 0.4 II4 0.6- 1.2 0.5 - 1.0 0.4 - 0.8 3/S 1.7 - 2.7 1.4- 2.2 l.O- 1.7 314 5.2 - 8.7 4.3 - 7.2 3.2 - 5.4 II2 3.3 - 5.4 2.7 - 4.4 2.0 - 3.3 1 8.8 - 17.7 7.4 - 14.9 5.6 - 11.4 27