The welding order for electric fusion tees is to weld the sides first and then the center. This order is for the following reasons:
1. To ensure welding quality. Welding the sides first ensures the airtightness and sealing of the pipe. Welding the center first will prevent the joints at both ends from maintaining a tight connection, affecting the pipe's performance.
2. To ensure a proper welding sequence. Welding the sides first and then the center makes the welding process smoother, reduces the possibility of weld defects, and improves welding efficiency.
3. To control the welding temperature. Welding the sides first allows the pipe temperature to rise gradually, preventing the pipe from heating too quickly and causing the fusion temperature to be too high, which can affect welding quality.
