High Quality Customizable PTFE Lined Bellow Expansion Joint

Product Overview

RUNXING’s High Quality Customizable PTFE Lined Bellow Expansion Joint is an essential component for industrial pipeline systems, engineered to absorb thermal expansion and contraction, reduce pipeline vibration, and compensate for axial, lateral, and angular misalignment. At its core, this Flange Connection PTFE Lined Bellow Expansion Joint combines the superior corrosion resistance of PTFE (polytetrafluoroethylene) with the structural strength of high-quality stainless steel, making it stand out from ordinary metal Pipe Fittings. Its key functions include protecting pipelines from damage caused by thermal stress, reducing noise transmission in pipeline systems, and ensuring tight sealing to prevent medium leakage. The core advantages of our product lie in its customizable design, long service life, excellent corrosion resistance, and easy installation, which can effectively reduce the overall maintenance cost of buyers' pipeline systems and improve the operational efficiency of industrial equipment.

Technical Specifications

• Material: PTFE lining (food-grade & industrial-grade available); Metal shell mainly adopts SUS304 and SUS316 stainless steel, SUS201 optional for specific requirements
• Connection Type: Standard flange connection (compliant with ANSI, EN, CE international standards)
• Pressure Rating: Customizable according to customer requirements, suitable for low, medium and high pressure pipeline systems
• Temperature Range: -200℃ to +260℃, maintaining stable performance in extreme temperature environments
• Size Range: Fully customizable, covering small-diameter (DN15) to large-diameter (DN1200) pipeline needs
• Corrosion Resistance: Resistant to most acids, alkalis, organic solvents and corrosive media, with excellent chemical stability
• Mechanical Performance: High tensile strength, good flexibility, able to absorb large displacement without deformation

Product Features

Core Technical Advantages

• Superior Corrosion Resistance: The PTFE lining provides absolute corrosion protection against harsh chemicals, which is the core advantage of our Corrosion Resistant PTFE Lined Bellow Expansion, far exceeding ordinary metal expansion joints.
• High Structural Strength: The metal shell made of SUS304/SUS316 stainless steel ensures the product can withstand high pressure and heavy load, making our Metal High Pipe Fittings PTFE Lined Bellow Expansion durable and not easy to deform.
• Excellent Flexibility: The bellows structure can freely absorb axial, lateral and angular displacement, effectively reducing the stress on pipeline joints and preventing pipeline damage.
• Perfect Sealing Performance: The precision manufacturing process ensures zero leakage of the medium, which is especially important for toxic, corrosive and expensive media transportation.

Competitive Differences

• Customizable Design: Unlike standard products on the market, our High Quality Customizable PTFE Lined Bellow Expansion Joint can be fully customized according to customers' size, pressure, temperature and medium requirements.
• Long Service Life: Backed by a 10-year mechanical warranty, the service life is 3-5 times longer than that of ordinary products, greatly reducing the replacement frequency and maintenance cost of buyers.
• Strict Quality Control: Every production link is monitored and controlled according to international standards, ensuring that each product meets the quality requirements of customers.
• Easy Installation: The flange connection design simplifies the installation process, reduces the installation time and labor cost, and can be quickly integrated into the existing pipeline system.

Working Principle

Our Ptfe Lined Bellows Expansion Joints rely on the flexible deformation of the metal bellows and the chemical stability of the PTFE lining to achieve their functions. When the pipeline generates thermal expansion or contraction due to temperature changes, the bellows will stretch or compress to absorb the displacement; when the pipeline vibrates or has slight misalignment, the bellows will flexibly adjust to reduce the impact on the pipeline system. At the same time, the PTFE lining isolates the metal bellows from the transported medium, preventing the metal from being corroded and ensuring the safe and stable operation of the pipeline.

Installation Steps of PTFE Lined Bellow Expansion Joint

1. Pre-installation Preparation: Check the model, specification and appearance of the Ptfe Expansion Joint to ensure it matches the pipeline requirements; clean the flange surface of the pipeline to remove dust, rust and other impurities.
2. Positioning and Alignment: Place the expansion joint at the designated installation position, and align the flange holes of the expansion joint with the flange holes of the pipeline to ensure accurate positioning without forced alignment (to avoid additional stress on the expansion joint).
3. Fastener Installation: Pass the high-strength bolts through the flange holes, and install the nuts and washers. Tighten the bolts evenly in a diagonal order to ensure uniform stress on the flange surface and good sealing performance.
4. Sealing Check: After initial tightening, check the gap between the flanges to ensure it is uniform; then tighten the bolts again according to the specified torque to prevent medium leakage caused by insufficient tightening or excessive tightening that damages the flange.
5. System Test: After the installation of the entire pipeline system is completed, conduct pressure test and leak test according to the industry standards to ensure that the Flange Connection PTFE Lined Bellow Expansion Joint operates normally without leakage.
6. Post-installation Inspection: Record the installation parameters and conduct a visual inspection of the expansion joint to ensure there is no deformation or damage during the installation process; mark the installation position for future maintenance and inspection.

Application Scenarios

Our PTFE Lined Bellow Expansion Joint has a wide range of applications in various industrial fields, thanks to its excellent corrosion resistance and structural performance. It can bring significant value to buyers in different industries, such as reducing maintenance costs, improving operational efficiency and enhancing production safety.

Chemical Industry

Applied in the transportation pipeline of acids, alkalis, organic solvents and other corrosive media, it can effectively prevent pipeline corrosion and leakage, reduce the risk of production accidents, and extend the service life of the pipeline system. It is widely used in chemical plants, pesticide factories and chemical raw material processing plants.

Petroleum and Natural Gas Industry

Used in oil refining, natural gas purification and transportation pipelines, it can absorb the thermal displacement and vibration of the pipeline under high temperature and high pressure conditions, protect the pipeline and equipment from damage, and improve the stability of the oil and gas transportation system.

Pharmaceutical and Food Industry

Adopting food-grade and medical-grade PTFE lining, it meets the hygiene standards of the pharmaceutical and food industry, and can be used in the transportation pipeline of medicines, food raw materials and finished products, ensuring the purity and safety of the medium without pollution.

Other Industries

It is also widely used in water treatment, metallurgy, electric power and other industries, solving the pipeline displacement and corrosion problems in various harsh working environments, and providing reliable support for the normal operation of industrial production.

Customer Value

• Cost Reduction: 10-year mechanical warranty and long service life reduce the frequency of product replacement and maintenance costs;
• Efficiency Improvement: Easy installation and stable performance reduce the downtime of the pipeline system and improve the overall production efficiency;
• Quality Enhancement: Excellent sealing and corrosion resistance ensure the quality of the transported medium and reduce the risk of product scrapping;
• Safety Improvement: Strict quality control and reliable performance reduce the risk of pipeline leakage and explosion, and improve the production safety level.