RUNXING PTFE-Lined Rubber Expansion Joint for Chemical Applications
Our High-Performance PTFE-Lined Rubber Expansion Joint is specifically designed for chemical and industrial applications. Featuring excellent corrosion resistance, high flexibility, and superior durability, this
PTFE Lined Rubber Joint effectively absorbs pipeline displacement, reduces vibration, and protects pipeline systems. Manufactured with strict quality control, it complies with international standards, providing reliable solutions for chemical, petrochemical, and industrial pipeline projects worldwide.
High-Performance PTFE-Lined Rubber Expansion Joint for Chemical Applications
Product Overview
The PTFE-Lined Rubber Expansion Joint from RUNXING is a high-quality piping component engineered for demanding chemical and industrial environments. As a core product of RUNXING, this PTFE lined
Rubber Joint integrates the excellent corrosion resistance of PTFE with the high flexibility of rubber, making it an essential solution for pipeline systems that transport corrosive media. It is primarily used to absorb thermal expansion and contraction, compensate for axial, lateral, and angular displacements, and reduce noise and vibration caused by fluid flow or equipment operation. Whether in chemical processing plants, petrochemical facilities, or other industrial settings, our PTFE-Lined Rubber Expansion Joint ensures stable and safe operation of pipeline systems, minimizing maintenance costs and extending service life.
Technical Specifications
- Lining Material: High-purity PTFE (Polytetrafluoroethylene), resistant to most strong acids, alkalis, and organic solvents
- Rubber Body Material: EPDM, NBR, or FKM, selected based on application environment and medium
- Flange Material: Carbon steel, SUS304, SUS316 (customizable according to requirements)
- Working Pressure: 0.6MPa, 1.0MPa, 1.6MPa (other pressure grades available on request)
- Working Temperature: -20℃ ~ +120℃ (PTFE lining)；-40℃ ~ +150℃ (special rubber body)
- Nominal Diameter: DN25 ~ DN600 (custom sizes for large diameters available)
- Connection Type: Flange connection (GB, ANSI, DIN, JIS standards)
- Axial Displacement: +10mm ~ -15mm (varies by diameter)
- Lateral Displacement: ≤10mm (varies by diameter)
- Angular Displacement: ≤5°
Product Features
- Exceptional Corrosion Resistance: The PTFE lining provides universal corrosion resistance, effectively resisting the erosion of strong acids, strong alkalis, oxidants, and organic solvents, making it suitable for various harsh chemical media transportation.
- High Flexibility and Displacement Compensation: The rubber body has excellent elasticity, which can effectively absorb axial, lateral, and angular displacements caused by thermal expansion and contraction, installation errors, or ground settlement, protecting pipeline connections and equipment.
- Superior Sealing Performance: Adopts advanced molding technology, ensuring tight connection between PTFE lining and rubber body, and reliable sealing between the joint and pipeline, preventing leakage of corrosive media and ensuring safe operation.
- Noise and Vibration Reduction: The rubber material has good damping performance, which can absorb the vibration generated by pumps, compressors, and other equipment, and reduce the noise caused by fluid flow in the pipeline, improving the working environment.
- Long Service Life: Selected high-quality PTFE and rubber materials, combined with strict production process control, make the product have excellent wear resistance, aging resistance, and fatigue resistance, extending the service life of the product.
- Easy Installation and Maintenance: Lightweight design, simple structure, convenient installation and disassembly, reducing construction time and labor costs; low maintenance requirements during use, saving maintenance costs for users.
Installation Steps
- Before installation, check whether the type, specification, and pressure grade of the PTFE-Lined Rubber Expansion Joint match the pipeline requirements, and ensure that the product is free of damage or defects.
- Clean the flange surfaces of the connecting pipeline to remove dirt, rust, and other impurities, and ensure that the flange sealing surface is flat and smooth.
- Place the expansion joint between the two flanges, align the bolt holes of the expansion joint flange with the pipeline flange holes, and ensure that the expansion joint is in a natural state without forced installation.
- Install the bolts and nuts, and tighten them evenly in a diagonal order to ensure that the flange surfaces are closely fitted and the sealing is reliable. Do not over-tighten to avoid damaging the flange or sealing surface.
- After installation, conduct a pressure test according to the pipeline system requirements to check for leakage. If there is leakage, loosen the bolts and re-tighten them; if necessary, replace the sealing gasket.
- After the pressure test is qualified, check the overall installation status again to ensure that all connections are firm and the expansion joint can move freely within the allowable displacement range.
Application Scenarios
Our PTFE-Lined Rubber Expansion Joint is widely used in chemical, petrochemical, pharmaceutical, food processing, metallurgy, power, and other industrial fields, especially suitable for pipeline systems transporting corrosive media. Typical application scenarios include:
- Chemical processing plants: Transportation pipelines for acids, alkalis, salts, and organic solvents.
- Petrochemical industry: Oil refining, chemical fertilizer, and petrochemical product transportation pipelines.
- Pharmaceutical industry: Pharmaceutical raw material and finished product transportation pipelines that require high cleanliness and corrosion resistance.
- Food processing industry: Acidic food, beverage, and food additive transportation pipelines.
- Metallurgical industry: Pipeline systems for corrosive media in smelting and processing processes.
- Power industry: Desulfurization and denitrification system pipelines in thermal power plants.
The application of our PTFE-Lined Rubber Expansion Joint in these scenarios can effectively improve the stability and safety of pipeline systems, reduce maintenance costs, and improve production efficiency. For example, in a large chemical plant, the use of our product solves the problem of pipeline leakage caused by corrosion and displacement, reducing production downtime and maintenance costs by more than 30%.
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