Rectangular non-metallic expansion joint

Product Introduction

Rectangular non-metallic expansion joint is a key flexible component for thermal displacement compensation of pipeline system, which is widely used in electric power, metallurgy, cement, chemical industry and other industries. The following is its comprehensive product introduction:

I. Basic structure and composition

1. skin: Core flexible component, composed of multi-layer composite materials (such as silicone cloth, fluorine adhesive cloth, glass fiber cloth), with both sealing, corrosion resistance and high temperature resistance.

2. Metal frame: Usually made of carbon steel (Q235-A) or stainless steel (high temperature operating conditions), providing structural rigidity and mounting interface.

3. Thermal insulation: Composed of ceramic fiber, aluminum silicate cotton and other materials, reducing heat conduction and protecting the skin.

4. Reinforced components: The corner is reinforced by circular arc steel plate, and the interface is optimized by channel steel to improve the overall stability.

Core functional characteristics

1. Multi-directional compensation ability

• It can compensate axial, transverse and angular displacements at the same time, and the compensation amount is several times that of similar metal expansion joints, especially suitable for large-size rectangular pipelines.

• Through the design of large circular arc corner, the stress concentration is reduced, the dead corner of deformation is eliminated, and the service life is prolonged.

• The non-metallic material itself has sound absorbing properties that significantly reduce piping system vibration and noise.

• The skin material can withstand a wide range of temperatures, conventional products are suitable for-20~450℃, and high temperature types can reach above 800℃.

• Fluorine gel, silica gel and other materials can resist the corrosion of acid and alkaline media, and are suitable for complex working conditions such as desulfurization and denitrification.

• The flexible material avoids the transmission of rigid reaction force, reduces the load on supports and pipes, and reduces the construction cost.

III. Technical parameters

4. Typical application areas

1. Power industry: Boiler flue, desulfurization and denitrification system, fan inlet and outlet.

2. Metallurgy/Cement: Flue gas pipeline of blast furnace and converter, high temperature gas transportation at kiln tail.

3. Petrochemical industry: Corrosive media pipes, gas turbine exhaust systems.

4. Environmental protection engineering: Complex working conditions such as waste incineration and dust removal system.

V. Key points of installation and maintenance

1. Installation adjustment: Pre-tension/compression adjustment is required through transport rod to avoid torsion or over-limit displacement.

2. Sealing treatment: Temperature-resistant gaskets should be selected for flange connection, and the skin should be protected from welding slag damage during welding.

3. Maintenance cycle: No special maintenance is required under normal working conditions, and the skin aging and the integrity of insulation layer are checked regularly.

Summary of Product Advantages: Compared with metal expansion joints, it has stronger compensation ability, lighter weight, excellent corrosion resistance, and can quickly replace skin parts through modular design. The specific selection should be based on the medium characteristics, temperature and pressure parameters And interface size customization.