Non Metallic Compensator: A Safety Device for Compensating Displacement And Protecting Pipelines

Non metallic compensator, also known as fabric compensator (expansion joint, expansion joint) or non-metallic flexible compensator, is a type of compensator that can compensate for multidimensional directions. The following is a detailed introduction to non-metallic compensators:

1、 Definition and Composition

The elastic element of the working body of the non-metallic compensator is made of non-metallic material, usually fiber fabric or rubber, hence its name. Fiber fabric materials cannot meet the usage conditions at ultra-high temperatures (above 400 ℃), while rubber materials can replace fiber fabrics in various other working conditions.

2、 Main function

a. Compensation displacement: Non metallic compensators can compensate for axial, angular, lateral, and combined displacements of pipelines caused by thermal deformation, mechanical deformation, and various mechanical vibrations.

b. Absorption expansion: Non metallic compensators can absorb thermal expansion or contraction caused by temperature changes in pipelines, preventing stress and deformation caused by thermal expansion and contraction, thereby avoiding pipeline leakage or fracture.

c. Reduce force: After the pipeline is heated and cooled, non-metallic compensators can effectively reduce the thermal expansion force on the pipe wall and the force acting on the valve or support structure.

d. Noise reduction and shock absorption: Non metallic compensators have good noise reduction and shock absorption effects, which can reduce noise and vibration in pipeline systems.

e. High temperature resistance and corrosion resistance: non-metallic compensators are coated with organic silicon, fluorine and other macromolecular materials, with high temperature resistance, corrosion resistance and sealing functions, fatigue resistance and aging resistance.

3、 Advantages and Characteristics

a. Diverse forms: Non metallic compensators can be customized according to actual needs, with various forms to meet the needs of different working conditions.

b. Large compensation amount: Non metallic compensators can provide large axial, angular, and lateral displacements within a small size range, with multi-dimensional displacement performance.

c. Long service life: Since the non-metallic compensator is made of high-quality non-metallic materials, it has good corrosion resistance, high temperature resistance and aging resistance, so it has a long service life.

d. No thrust transmission: Non metallic compensators are made of flexible raw materials, which can eliminate rigid force transmission, improve the design of pipeline systems, and increase the service life of pipeline equipment.

4、 Application scope

Non metallic compensators are widely used in exhaust gas desulfurization, dust removal equipment, air heating, and other applications in steel mills, smelters, petrochemical plants, thermal power plants, chemical plants, cement plants, nuclear power plants, and atomic power plants. At the same time, non-metallic compensators can effectively solve problems such as thermal expansion and mechanical vibration in ventilation, dust removal, smoke exhaust, and air conditioning insulation pipelines and equipment, ensuring the normal operation and safety of the system.

5、 Installation and maintenance

a. Installation: Non metallic compensators should be installed in their natural state and not deformed. Meanwhile, during the installation process, attention should be paid to protecting the insulation layer of the compensator to prevent high-temperature objects such as welding slag from igniting the outer skin of the compensator. When burying non-metallic compensators, it should be ensured that their burial depth and the thickness of the filling sand meet the specified requirements.

b. Maintenance: Non metallic compensators should be regularly inspected and maintained during use to ensure their proper functioning. The inspection includes the deformation of the compensator, the fastening of the connecting parts, and the integrity of the coating. When used in corrosive environments such as desulfurization towers, attention should be paid to corrosion protection measures; When used in high friction environments, vulnerable parts such as skin should be replaced regularly.

In summary, non-metallic compensators are powerful and widely used pipeline compensation devices. When selecting, the appropriate type and model should be chosen according to the specific usage environment and requirements; During installation and maintenance, it is necessary to strictly follow the prescribed requirements to ensure its normal operation and extend its service life.