Before installation, the type and standard of the bellows expansion joint and the support equipment of the pipeline must meet the planning requirements.

For lining elastic joints, care should be taken to make the direction of the lining and the flow of the medium the same (marking device according to the elastic throttling direction). The hinge rotation plane of the flat angle elastic joint should be the same as the displacement plane.

Regarding the elastic seams that require "cold tightening", the auxiliary components used for pre-deformation should be removed after the piping system is installed.
After the installation of the pipeline system is completed, the auxiliary positioning mechanism and fasteners used for device and transportation protection on the elastic joint should be removed immediately, and the limit device should be adjusted to the specified position according to the planning requirements, so that the pipeline system can meet the environmental conditions. Compensation ability.

Except for the pre-tightening pre-compression or "cold-tightening" pre-deformation required by the planning, it is strictly forbidden to use the method of bellows deformation to adjust the deviation of the pipeline installation, so as not to affect the normal function of the elastic joint, and lower the pipeline system, equipment receiving and supporting parts. Life, add load.

All moving parts of the expansion joint shall not be blocked by external parts or restrict the normal movement of the moving parts.

During installation, it is not allowed to splash welding slag on the surface of the bellows and cause other mechanical damage to the bellows.

Expansion joints used for gaseous media and their catches. During the water pressure test, it should be considered whether it is necessary to add a temporary support on the expansion joint catches during water filling.

The water for hydrostatic test must be clean and non-corrosive, and the chloride ion content in the water must not exceed 25ppm.
After the water pressure test is completed, the water in the corrugation should be drained as soon as possible, and the inner surface of the corrugation should be quickly dried.