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Jointing Electrodes

How to join the Electrodes

Transportation and Storage

When transporting and unloading, care should be taken to prevent the threads and the end surfaces from breakage and damage. When storing, keep the electrodes in the place that is from dust, moisture and heat.

Connection

fig.1

1.Clean the socket and the end surface of the electrode column

Clean the captioned area at the top of column by air-blowing and wiping-off to remove dust and any foreign materials (Fig.1)

fig.2

2.Screw-in new set of electrodes

Suspend the new electrode using a suitable suspension device (Fig.2), and center it carefully over the column (Fig.3), Screw in the electrode until a gap between the electrodes becomes approx 20-30mm, then blow the dust out of the gap with compressed air again (Fig.4)

fig.3

fig.4

3.Tightening with proper torque

Securing the new electrode in place, a tightening device suitable for the size of electrode should be used in proper manner to ensure satisfactory tightening and correct torque (see next page).

Nominal Diameter Recommended Tightening Torque
(inch) (mm) (Nm) (kgfm)
14 350 1,650 165
16 400 2,000 200
18 450 2,500 250
20 500 3,200 320
22 550 3,800 380
24 600 4,300 430
26 650 5,300 530
28 700 6,300 630
30 750 7,500 750
32 800 9,000 900

4.Recommended tightening torque

The table shows the recommended torque. We suggest using a connecting machine for electrodes larger than 24 inches.

Procedure after Connection

After connection has been completed, the electrode column is usually reclamped. However, please do not clamp the outside of the white lines at both ends of an electrode.

Clamping in the area may result in cracking or deformation at joint.

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