1. Welded Tee: A tee pipe fitting that is焊接 after mating with the connecting pipe components.

2. Socket Tee: A type of tee pipe fitting where the connecting pipe is inserted into each end of the tee and then welded or fused.

3. Clamp style Tee: A type of tee pipe fitting where each end features a clamp connection, which is secured after the pipe fitting is inserted.

4. Threaded Tee: A tee pipe fitting connected by threads.