1. Pipe fittings for connecting pipes include: flanges, unions, pipe clamps, couplings, sleeves, and collars, etc.

2. Pipe fittings for changing direction: elbows,弯管

3. Pipe Fittings for Changing Pipe Diameter: Reducing (Reduced) Tee, Reducing Elbow, Branching Duct, Reinforcing Pipe

4. Increase pipeline branch fittings: tees, fours.

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

6. Pipeline fixing fittings: clamps, tow hooks, lifting rings, brackets, supports, pipe clamps, etc.