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1.Coaxial Alignment: The Bellow Expansion Joint must be coaxially aligned with the pipeline to ensure its normal operation.
2.Flow Direction Markings: For compensators with flow direction markings (arrows), the arrow direction indicates the medium flow direction and must not be installed in reverse. For compensators with inner sleeves, ensure that the orientation of the inner sleeve aligns with the medium flow direction.
3.Pre-deformation and Pre-stretching: For compensators requiring pre-deformation, the pre-deformation amount must comply with design specifications and be recorded after installation. For compensators requiring pre-stretching or compression, check along the circumference to ensure uniform force application and consistent deformation, with allowable deviations not exceeding 5% of the pre-stretching or compression amount.
4.Support Settings: Fixed supports must possess sufficient strength to prevent damage to the bellow expansion joint. Guide supports must provide adequate guidance to ensure the transmission of axial displacement along the pipeline. Only one compensator or a set of angular compensators can be installed between two fixed supports.
5.Environmental Conditions: The installation ambient temperature should range from -25°C to 60°C, with a relative humidity of ≤95%. Additional protective measures may be required in cold or hot environments.
6.Corrosion Protection and Insulation Materials: The corrosion protection and insulation materials used for the compensator must not compromise its service life, and insulation materials in contact with the compensator's bellows must be chlorine-free.
7.Protection Against Mechanical Damage: During installation, welding slag must not splash onto the bellows surface, and the bellows must be protected from other forms of mechanical damage.
8.Safe Operation: Before installation, verify that the compensator's model, specifications, and pipeline configuration comply with design requirements. During installation, avoid bending or misaligning the bellows.
9.Adjustment of Limit Devices: For compensators requiring pre-deformation, adjust the limit devices as required after installation.
By adhering to these detailed requirements and steps, the correct installation and normal operation of Bellows Type Expansion Joint can be ensured.
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