Yes, it can. The fabric belt must be able to withstand the thermal, pressure and chemical conditions. Modern fabrics accomplish this with a chemically inert barrier bonded to high strength substrate. For high-temperature applications, a layer of insulation is incorporated into the belt.
In certain conditions, a particulate deflector can be specified to reduce air-born particulate from falling down into the expansion joint cavity. This is most common on vertical ducting with the flow directions up and an upstream liner overlapping the downstream duct. The deflector presents an angled surface to the flow and eliminates a ledge for build-up.
Tools needed include: Suitable/safe scaffolding, Lifting equipment (forklift, crane, hoist), Drill, Come along, Rope, Pry Bar
The gasket is a non-porous deformable material that is installed between the belt attachment flange and the fabric belt. The gasket allows a gas-tight seal when the back-up bar clamping action is applied.
It includes integral telescoping liners to retain the accumulation barrier and protect the belt from abrasion.
It is defined as an assembly that utilizes a fabric belt element to allow for the movement of ductwork, as opposed to a metal expansion joint which allows for the movement by means of convoluted metal bellows.
Typical operating conditions are 600 degrees F to 750 degrees F, 5†to 80†WG pressure, clean air media, boiler growth contributes to large axial or lateral expansion joint movements depending on the orientation of the joints.
Bolt-in design for attachment to equipment or duct flanges. (If equipment or duct flanges are not present, weld in designs are recommended.)
In addition to fabric expansion joints, U.S. Bellows is a major designer and fabricator of ducting. Design Integration is the design, manufacture, and shipping of expansion joints integrated into the ducting as a complete unit directly from U.S. Bellows. This enables U.S. Bellows to offer optimum system design and the lowest installed cost.
The twisting of one side of the duct about an axis perpendicular to the longitudinal axis.
The increase in the breach opening along the axis of the duct. In certain configurations, the duct thermal expansion may result in extension at the expansion joint location.
It is the opening in the duct where the expansion joint is installed.
The reduction in the breach opening along the axis of the duct. This is usually a result of thermal expansion of the ducting.
It is a structural angle or channel that is welded to the end of the ducting facilitate bolting or welding the expansion joint into the system.
We do not air test fabric expansion joints; all welds are liquid penetrant tested.
The rubber molded expansion joint would be used for water services or applications with low temperature.
The installed length is the overall face-to-face length of the expansion joint to be installed.
We can also do fabric expansion joints but that would be for a very low-pressure application.
The fabric is comprised of various layers:
The fabric joints do not have stiffness values as the metallic bellows do.
