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.

1. Before assembly, carefully check whether the relevant equipment can operate normally. During assembly, a dedicated person will direct and operate by relevant standards to avoid injuries.
2. During construction, if it is necessary to pre-pave relevant pipelines with stone piers or sacks, the cushion design must have a solid foundation to prevent accidents from rolling pipes and injuring people; frozen soil and stones are strictly prohibited as cushions for spiral steel pipes.