High pressure elbows not only have good pressure resistance, but also need other excellent characteristics in different piping systems. For example, in the concrete conveying pipeline, the high-pressure elbow in the mud conveying pipeline should not only be able to withstand higher pipeline pressure, but also have good wear resistance. The high pressure elbow in the chemical raw material conveying pipeline system has excellent corrosion resistance and acid and alkali resistance in addition to bearing high pipeline pressure.