1. Pipe fittings for connecting pipes include: flanges, unions, pipe clamps, band clamps, sleeve couplings, and hose clamps, etc.

2. Fittings for changing pipe direction: elbows, bends

3. Fittings for changing pipe diameters: Reducing (Reduced) Tee, Reducing Elbow, Branch Support Flange, Reinforcing Pipe

4. Increase pipeline branch fittings: Tees, Crosses

5. Pipe fittings for pipeline sealing: gaskets, plumber's tape, sisal rope, blind flanges, pipe caps, blind plates, covers, and welding plugs

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