| 摘要 |
<p>PURPOSE:To easily remove sensors inserted into sensor holes after finishing the supply of power and enhance working efficiency by removing the sensors from the sensor holes of a pipe joint during a period of time until temperatures in the sensor holes of the pipe joint are lowered from the temperatures at the time of finishing the supply of power to a fixed level after stopping the supply of power to an electric heating wire. CONSTITUTION:The title bonding method is carried out by supplying electric power to an electric heating wire 2 embedded in a thermoplastic pipe joint 1, stopping the supply of power to the electric heating wire 2 when the temperatures of sensors inserted into sensor holes of the pipe joint 1 reach a level at which the supply of power is finished, and electrically welding a thermoplastic pipe inserted into the pipe joint. In this case, after the supply of power to the electric heating wire 2 is stopped, the sensors are removed from the sensor holes of the pipe joint during a period of time until temperatures in the sensor holes of the pipe joint 1 fall by 50 deg.C from the level at which the supply of power is finished. Thereby, the sensors can be easily removed, the time required for welding and bonding work is shortened, and working efficiency is enhanced.</p> |
