PTFE Lined Expansion Joint

PTFE Lined Expansion Joint for corrosive and high-purity industrial services where material compatibility, sealing and documentation matter.

Applications

• Corrosive media handling
• Chemical transfer lines
• Process isolation
• Plant maintenance

Industries used

• Oil & gas
• Chemical processing
• Refineries
• Water treatment
• Power

Key specifications to share

We are leading Lined Expansion Joint Manufacturer in India. A PTFE lined expansion joint, also known as a PTFE expansion Bellow, is a specialized component in corrosion resistant piping systems designed to absorb movements, vibrations, and sudden shocks, accommodating thermal expansion and contraction while maintaining a leak-free seal. These joints are particularly designed for industries such as oil and gas, refineries, chemical processing, power generation, and petrochemicals, where high variations in temperature and movement are common during the transport of corrosive media.
The PTFE expansion joint utilizes expansion bellows technology, typically made from materials like stainless steel outer shells with a 3 mm thick Teflon lining inside. They consist of a series of convolutions 2, 3, or 5 that allow for flexibility, enabling them to expand and contract within a certain range, ensuring the stability and integrity of the pipeline. The internal lining of PTFE enhances the bellows resistance to corrosive substances, thereby extending the lifespan of the expansion joint. Additionally, the lining provides a smooth surface with a friction coefficient between 0.05 and 0.10, minimizing turbulence and pressure drop within the system. This combination of flexibility and corrosion resistance allows these joints to effectively prevent stress-related damages and leaks.

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Teflon / PTFE lined expansion joints into your Chemical, pharmaceuticals, Oil & Gas, and chemical processing plants. The corrosion-resistant lining enhances durability, reducing maintenance frequency and extending the service life of the system. The convoluted PTFE design of the lined bellows reduces system stress and strain. While these expansion joints are normally installed horizontally, vertical and perpendicular installations are also possible with ANSI B16.5 standard Connection. Their ability to absorb movements and vibrations contributes to operational safety by minimizing the risk of pipeline failures and leaks.

Design Standard: ASTM G31Pressure Range: PN 10 to PN 40Size Range: 25 mm to 300 mmBody M.O.C.: Ductile Iron (GGG40.3 / ASTM A395), Cast Steel (ASTM A216 Gr. WCB), Stainless Steel (ASTM A351 CF8, CF8M)Operating Temperature: -29°C to 200°CCoefficient Of Friction : 0.05 to 0.10Convolution Options: 3, 4, 5Bellow Material: PTFE, Rubber, FlaredFlanges: 316 Stainless Steel, ANSI 150#, B16.5Reinforcing Rings: 316 SS, 304 SSHydraulic Test: 29.8 kg/cm²Spark Test: 15 K.V.D.CConductivity: 0.20 to 0.6 W/mK