BurgFlex® Multi-Layer Expansion Joints

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The design of multi-layer expansion joints is a sophisticated process that involves the careful selection and combination of four essential groups of materials. By considering their thermal, chemical, and mechanical resistance, as well as their fatigue properties, BURGFLEX can create expansion joints that provide optimal technical and economic solutions for various applications.

1. Outer Covering Material:

◦ This material plays a critical role in ensuring the stability and protection of the expansion joint against pressure and temperature fluctuations. It is typically coated or laminated to serve as an effective gas sealing barrier.

◦ Special designs may incorporate stainless steel wire mesh and steel bands to enhance mechanical protection and maintain dimensional stability.

2. Gas Sealing Foil:

◦ Positioned between the layers of fabric or integrated within the outer cover, the gas sealing foil acts as the primary sealing element. It is impermeable and chemically resistant, ensuring the integrity of the joint under various operating conditions.

3. Insulating Materials:

◦ These materials protect the gas sealing foil and other internal components from the adverse effects of high temperatures. The choice and thickness of insulating materials are determined based on the specific temperature conditions of the application.

4. Temperature-Resistant Fabrics:

◦ Extremely strong and temperature-resistant, these fabrics provide additional protection for the gas sealing foil and insulation materials, ensuring the longevity and reliability of the expansion joint in high-temperature environments.

• Medium:

◦ The type of expansion joint required is significantly influenced by potential chemical interactions. To prevent abrasion from solid matter, sleeve and baffle constructions can be effectively utilized.

• Temperature:

◦ To mitigate the effects of temperature on the expansion joint, a specific combination of insulating materials is employed. Experts at BURGFLEX calculate the required insulation based on expected temperature variations across the joint design, with temperature ranges varying based on the specific application.

• Pressure:

◦ The expansion joint’s application in either a positive or negative pressure environment heavily impacts the selection of materials and design features. The chosen configuration must accommodate the pressure conditions it will face.

• Tightness (Sealing):

◦ The sealing requirements ultimately dictate the design and configuration of the flange area of the expansion joint. Adequate sealing is essential for preventing leaks and ensuring efficient operation.

BurgFlex® multi-layer expansion joints are suitable for a wide range of industrial applications, including:

• High-temperature flue gas systems

• Chemical processing plants

• Oil and gas facilities

• Power generation and distribution systems

With their advanced design and material selection, BURGFLEXmulti-layer expansion joints provide robust solutions for managing movement, temperature, and pressure, ensuring the reliability and efficiency of piping and ducting systems.