Duplex metal expansion joints play an important role in many industrial fields. It is composed of bellows, tie rods, flanges, etc. It has a compact structure and can compensate for multi-directional displacement. It is widely used in thermal pipeline systems in petrochemical, electric power, cement, metallurgy and other industries, especially in complex pipelines that need to compensate for axial, transverse or angular displacements.

Compound metal expansion joints have many performance characteristics, and have multi-directional compensation ability, which can compensate axial, transverse and angular displacements simultaneously; Resistant to high pressure and high temperature, made of stainless steel and other materials, suitable for high temperature and high pressure environment; Can simplify the support structure and reduce the dependence on the pipeline support. It also has the advantages of compact structure, convenient installation and maintenance, strong compensation ability, corrosion resistance and long life.

Of course, it also has some drawbacks or precautions, such as the possible high cost and strict specifications to be followed during installation to avoid torsion or undue stress.

Compared with non-metallic expansion joints, compound metal expansion joints have weak lateral compensation, adapt to ultra-high temperatures, rely on material selection to achieve corrosion resistance, high initial cost but long life and less maintenance.

In short, the composite metal expansion joint is an ideal choice for complex industrial pipeline systems due to its multi-directional compensation ability, high pressure resistance and long life. However, in scenarios with extremely high lateral displacement requirements or budget constraints, it can be considered to be used in combination with non-metal expansion joints.