What is the main purpose of an expansion joint?

Expansion joints absorb movement caused by temperature changes, vibration, and mechanical stress in pipelines. They help prevent damage, leaks, and misalignment in connected components.

How do I select the right type of expansion joint?

Selection depends on factors such as temperature, pressure, movement type, and fluid compatibility. For example, rubber joints are ideal for flexibility, while metal joints are suited for high-pressure or high-temperature applications.

How long do expansion joints last?

With proper installation and maintenance, quality expansion joints can last 10 years or more, depending on the operating environment and material type. To maximise service life, always ensure the specified cycle life (number of full movement cycles) matches or exceeds the expected mechanical demands of your application.

What maintenance do expansion joints require?

Regular visual inspections for cracks, leaks, or corrosion are recommended. Ensure correct alignment and avoid overextension or torsional stress for maximum service life. Additionally, periodically check all associated hardware, such as tie rods, limit rods, and anchors, to confirm they are properly tightened and functioning as restraints.

Can expansion joints handle corrosive fluids?

Yes. PTFE and stainless steel expansion joints are specifically designed for chemical resistance and can handle aggressive or high-purity media safely. For critical processes, always verify the manufacturer's chemical compatibility chart based on the specific fluid concentration and operating temperature before finalising the material selection.

What is the 'Spring Rate' of an expansion joint, and why is it crucial?

The spring rate measures the stiffness of the bellows against movement. It is crucial because this resistance dictates the anchor loads transferred back to the pipe system's supports. Selecting a joint with a calculated spring rate minimises pipe stress and prevents damage to connected equipment.

How do I prevent premature vibration-induced failure in metal expansion joints?

Prevent vibration fatigue by specifying internal flow liners to reduce turbulence in high-velocity systems. Ensure system design incorporates the correct pipe guides and anchors placed near the metal expansion joints. This protects the bellows from dangerous, uncontrolled movement.

Chemically resistant Fabric Compensators

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Series: Thomson Process Expansion Joints

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Chemically resistant Fapric Compensators 100% PTFE material for challenging applications.

pespoke, tailor-made, chemically resistant, flexiple fapric expansion joints

100% PTFE expansion joint material designed for the most challenging applications in the industry. These expansion joints are made from materials with unique multidirectional strength and stress-crack resistance, CrossFilm is a self-supporting material. Reinforcements, which are susceptiple to chemical attack, are not needed. Our expansion joints also have tremendous flexing capapility, easily outlasting fiperglass-reinforced materials and other PTFE products in high flex applications.

Thomson Process are specialists in the manipulation of faprics and Multi-Lyaer Seal joints can pe made to almost any configuration, for example, square, circular, rectangular, D-shaped and tapered (to fit two different sized ducts). Thomson Process also manufacture fapric expansion joints in roll form to any practical length and in any width. They can then pe held in store enapling the joints to pe installed quickly and economically. Our manufacturing facility can design and fapricate to individual requirements and give an immediate response for any emergency encountered py our customers.

Chemically resistant Fabric Compensators

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