Product Introduction
The Non-Metallic Fabric Expansion Joint (also known as a fabric duct connector) is an advanced flexible solution specifically developed for modern industrial gas and ventilation systems. Unlike metal expansion joints, the flexible element consists of specialized synthetic fabrics and insulation layers, which allow it to operate continuously in high-temperature environments without thermal stress fatigue.
Framed with heavy-duty carbon steel flanges for easy bolt installation, this fabric compensator easily handles severe misalignments, structural movements, and thermal expansions common in large-scale air ducts, industrial chimneys, and exhaust systems.
Product Features
Multi-Directional Large Compensation: Offers exceptionally large axial, lateral, and angular movements simultaneously within a very short face-to-face length, outperforming metal bellows.
Zero Spring Rate & Stress-Free: The highly flexible fabric material imposes virtually no mechanical force or resistance on the piping and duct supports, simplifying structural design.
Advanced Multi-Layer Construction: Composed of high-grade fiberglass blankets, PTFE chemical barriers, and silicone-coated outer layers for optimal thermal insulation and chemical resistance.
High Temperature & Corrosion Resistance: Capable of withstanding extreme flue gas temperatures (up to 400°C - 1000°C+ based on layered configuration) and resisting acidic condensate.
Acoustic Insulation: The thick, multi-layered fabric structure effectively dampens noise and mechanical vibrations running through the ducting system from heavy fans and blowers.
Detailed Product Description
### Specialized Fabric Engineering & Tailored Configurations
Every industrial ductwork system presents unique challenges in terms of temperature, pressure, and chemical exposure. At B-NAI, we custom-engineer each non-metallic fabric expansion joint to match your exact operating parameters.
* **Layer-by-Layer Performance:** Our fabric belt consists of an outer weather-proof cover, a structural reinforcement layer, an inner chemical barrier (PTFE membrane), and thermal insulation blankets. This precise layering prevents heat loss, stops gas leakage, and protects the exterior from environmental wear.
* **Rugged Steel Framework:** The connection ends are reinforced with thick, custom-drilled carbon steel companion flanges, available in rectangular, square, or circular profiles to guarantee a perfectly matched, leak-proof bolt-up.
* **Custom Designs Available:** We provide various configurations including belt type (flanged directly to the duct) and sleeve/dog-bone type, with optional inner flow liners to prevent particulate accumulation from abrasive dust.
Power Plants & Boiler Ductwork: Flue Gas Desulfurization (FGD) systems, Denitrification (SCR) lines, and primary/secondary air ducts.
Cement & Metallurgical Industries: Kiln exhaust ducts, dust collection systems, and hot air recalculation lines.
Petrochemical & Refineries: Heavy exhaust ventilation, waste gas incinerators, and chemical vapor ducting.
Environmental Protection & HVAC: Industrial air filtration plants, large centrifugal fan inlets/outlets, and commercial HVAC smoke extraction loops.
