Characteristics and Basic Structure of Non-Metallic Compensators

Release time:

2023-05-11

A non-metallic expansion joint consists of a flexible compensating element, flanges or connecting pipes, thermal insulation materials, and bolt rods. It can accommodate large axial, angular, and lateral displacements within a very compact footprint without generating any reaction thrust. The primary materials used are shredded fiberglass fabrics and their coated products, which have relatively poor transmission properties. Now, let’s take a closer look at the features and basic structure of non-metallic expansion joints.

　　 Non-metallic compensator It consists of flexible compensating elements, flanges or connecting pipes, thermal insulation materials, and bolt rods, enabling large axial, angular, and lateral displacements within a very compact size range without generating any reaction thrust. The primary materials are shredded fiberglass fabrics and their coated products, which have relatively poor transmission properties. Next, let’s take a closer look at the characteristics and basic structure of non-metallic expansion joints.

　　The use of non-metallic compensators simplifies the design, eliminates the need for large supports, and significantly reduces both material and labor costs. These compensators also provide noise reduction and vibration damping—thanks to the sound-absorbing and vibration-damping properties inherent in the fiber fabric and thermal insulation cotton, they can effectively minimize noise and vibration from systems such as boilers and fans. At the same time, they exhibit excellent resistance to high temperatures, corrosion, and sealing performance. Coated with high-performance polymer materials such as silicone and fluorine, they offer superior resistance to high temperatures, corrosion, and exceptional sealing capabilities. They are easy to install and maintain.

　　One, Non-metallic compensator Features

　　Non-metallic expansion joints primarily consist of a flexible compensating element (made of non-metallic materials), connecting components at both ends (flanges or solid pipes), adjusting elements (screw rods), and thermal insulation materials. They are mainly used to compensate for displacements in gas pipeline systems caused by factors such as temperature changes, mechanical vibrations, and foundation settlement, which occur when conveying dust, gases, and flue gases.

　　1. Thermal expansion compensation: It offers multi-directional compensation, far superior to metal compensators, which can only provide single-directional compensation.

　　2. Installation Error Compensation: Since systematic errors are inevitable during pipeline connections, non-metallic fabric compensators can better compensate for installation errors.

　　3. Noise and Vibration Reduction: Fiber fabrics and thermal insulation cotton have sound-absorbing and vibration-isolating properties, effectively reducing noise and vibration from systems such as boilers and fans.

　　4. No reaction force: Since the primary material is fiber fabric, there is no force transmission. Using non-metallic fiber compensators can simplify the design, eliminate the need for large supports, and significantly save on materials and labor.

　　5. Excellent high-temperature and corrosion resistance: The selected fluoroplastics and silicone materials exhibit outstanding high-temperature and corrosion resistance.

　　6. Excellent sealing performance: With a relatively complete production and assembly system, the non-metallic flexible compensator ensures zero leakage.

　　7. The body is lightweight, the structure is simple, and it’s easy to install and maintain.

　　8. Non-metallic compensators are cheaper than metallic compensators and superior in quality to imported products.

　　II. Basic Structure of Non-Metallic Expansion Joints

　　1. Used to absorb expansion and prevent air leaks and rainwater infiltration.

　　2. Skin: The primary expansion element of the non-metallic compensator is a high-performance silicone rubber or high-siloxane polytetrafluoroethylene composite layered with alkali-free glass wool. It is a high-strength, sealing composite material.

　　3. Stainless steel wire mesh: Used as the liner for non-metallic expansion joints, it prevents debris from the circulating medium from entering the expansion joint and stops the thermal insulation material inside the expansion joint from escaping outward.

　　4. Thermal Insulation Cotton: This material combines the dual functions of thermal insulation and air tightness for non-metallic expansion joints. It is composed of fiberglass fabric, high-silica fabric, and various types of insulating cotton felts. Its length and width are consistent with those of the outer layer of the purple skin. Recommendations for the Use and Installation of Non-Metallic Expansion Joints: Non-metallic expansion joints offer advantages such as simple installation, large radial displacement, no inherent stiffness, minimal thrust on equipment, and space-saving design. As thermal compensators and vibration dampers, non-metallic expansion joints are widely used in piping systems and are subject to strict control during both design and manufacturing. By employing non-metallic expansion joints, it is possible to reduce the overall cost of piping systems while still meeting performance requirements.

　　The above is what has been introduced. Non-metallic compensator Its features and basic structure. If you’d like to learn more, feel free to contact us anytime! Our company has many years of experience and looks forward to having you join us at any time.

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