Centrifugal casting has good external pressure resistance, but poor internal pressure.
Continuous winding has large investment and complicated equipment. The equipment is well debugged, the quality is stable, and the debugging is not good, so the whole piece may be scrapped. The product price is higher and the production efficiency is higher and faster.
The latter two processes are inconvenient to install, and need special pipe hoop short connection, which is twice as much as the fixed-length interface, which may cause more leakage.