The electric fusion method of pipe manufacturing requires what initial step?

The electric fusion method of pipe manufacturing involves using electrical energy to generate heat that fuses the edges of a pipe or plate together. The initial step in this process is heating the plate to the proper welding temperature. This heating is crucial because it prepares the material for the fusion process, ensuring that it reaches a malleable state where the particles can bond together effectively. Proper temperature control is essential for achieving a strong, durable weld without compromising the integrity of the material.

Other methods mentioned, like cooling the plate, shaping it by hand, or using water to form the shape, do not align with the electric fusion process as these do not contribute to the essential step of preparing the material for welding through heating.