In order to solve the problem of excessive misalignment in the alignment of spiral steel pipe nozzles, the following preventive measures should be taken in quality management control:

1. Try to use internal alignment devices.
2. Carry out engineering measurement and trimming work during assembly.
3. When aligning the welded pipe group, do a good job in grading the welded pipe section.
4. A copper hammer or a copper plate hammer can be used for local analysis and correction.
5. When there is dislocation and deformation, the gap should be processed.