1. Fittings used for connecting pipes include flanges, swivel joints, pipe clamps, band clamps, sleeve unions, and collars, etc.

2. Pipe Direction Changing Fittings: Elbows, Bends

3. Pipe fittings for changing pipe diameter: Reducing (Reduced) Tee, Reducing Elbow, Branch Tee, Reinforcing Pipe

4. Increase pipeline branch fittings: tees, fours.

5. Pipeline sealing fittings: gaskets, plumber's tape, hemp rope, flange blind plates, pipe caps, welding blind caps

6. Pipeline fixing fittings: clamps, hooks, shackles, brackets, supports, pipe hangers, etc.