Fabric expansion joints
Custom fabric expansion joints for ducting, air, gas and flue-gas services, with single- or multi-layer constructions suited to the temperature, medium and movements.
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Manufacture to drawing or sample
EST supplies expansion joints and flexible sleeves made from coated technical fabrics, with or without a thermal barrier.
Constructions are specified according to:
- temperature;
- positive or negative pressure;
- the medium;
- humidity;
- vibration;
- movements;
- number of cycles;
- the external environment;
- installation constraints.
Coated fabrics
Materials commonly considered include:
- silicone-coated glass fibre;
- silicone-coated Kevlar/aramid;
- PTFE-coated glass fibre;
- EPDM-coated glass fibre;
- Viton®/Nomex;
- nitrile-coated nylon;
- other constructions to suit the requirement.
Thermal barriers
Depending on the gas-stream temperature, one or more insulation layers can be incorporated:
- glass fibre;
- aluminised glass fibre;
- graphite-coated glass fibre;
- metal-reinforced high-temperature fibres;
- ceramic fibre;
- treated silica;
- silica felts.
Bolsters and flow liners
A bolster / insulation pad can protect the sealing layer from direct gas-stream temperature.
A metal flow liner can also be incorporated in certain configurations to protect the expansion joint from the gas stream, abrasion or temperature.
Profiles
Configurations include:
- flat profile;
- U-shaped profile;
- other shapes to suit the movements and installation.
Associated services
Depending on the project, EST can provide or coordinate:
- site measurement;
- manufacture from a sample;
- repair;
- removal and installation;
- on-site work;
- associated fabrication work through partners where required.
Let us review your requirements
For existing ducting or a fabric expansion joint, a drawing, several photographs and the operating conditions are often enough to begin the assessment promptly.