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Bolt Torque Calculator

required

Required field. Select pipe material first
to be able to see available options for DN and Sched/SDR.

required
Material grade Yield strength
GR 4.6 240 MPa
GR 8.8 640 MPa
GR 10.9 940 MPa
fy = MPa

Required field. Must be decimal.
Maximum 5 characters long.

required
ky = %

Required field. Must be decimal.
Maximum 5 characters long.

required
kt =

Required field. Must be decimal.
Maximum 5 characters long.

$$A_t = \pi . {d_m^2 \over 4}$$ $$F_b = k_y.f_y.A_t$$ $$T_b = k_t.F_b.d_n$$
dn = mm

Required field. Must be decimal.

dm = mm

Required field. Must be decimal.

At = mm2

Required field. Must be decimal.

Fb = N

Required field. Must be decimal.

Tb = Nm

Required field. Must be decimal.