- Fusion welding of edges: it is the most important application in the hot plate welding, it is used primarily for joining thermoplastic pipes for gas and water distribution.
- Fusion welding of the base: a tool, with the shape of the inner and outer pipe, heats the two parties before they are placed one inside the other.
- Fusion welding of the saddle: to secure a saddle to a pipe, a tool is used to heat the outer surface of the pipe and the assembling side of the saddle.
- High temperature welding: the hot plate is usually made of steel or bronze (for complex geometries), and it is not teflon-lined because at a high temperature (+-500 ° C), the molten plastic in contact evaporates, so it should be drawn with special exhaust systems.
- Welding at normal temperature: the temperature of the hot plate is above the melting temperature of the polymer, is covered with a layer of Teflon to avoid to stick the polymer during the fusion that occurs by contact, the temperature is never above 260 to 270 ° C because at higher temperatures the teflon begins to melt.
- Non-contact radiation: Usually steel plates on 500 ° C, with distance from the piece of 1mm when the geometry of the piece is flat, are used. For complex geometry pieces, shaped resistors are used on ceramic supports at +- 700 ° C, or are used infrared lamps. In any case, the parts must be shield as must not be heated.
