Ocelflex recommends to use inner sleeve in applications where there are high frequency vibrations caused by the inner media flow or where the inner media is corrosive enough to damage the inner thin wall of the metal expansion bellow.

Inner sleeves or liners minimizes the pressure drop throughout the expansion joint.

At Ocelflex we design the inner sleeves keeping into consideration that it should not restrict the movement.

Limit rods are for protection of the single expansion joint in case of anchor failure.

The threaded rods are fixed at the maximum movement points and so restrain the excess movements which can be caused due to pressure and forces caused during anchor failure.

These rods are usually manufactured in mild steel, but can also be manufactured in stainless steel for corrosive environments.

Given the delicate nature of the thin walled metal bellow element we recommend metal outer covers to protect these joints during plant construction and maintenance activities.

This cover also safeguards the expansion bellows from weld splatter, falling tools or parts, and potential damage from nearby accidents.

When designing metal expansion joints with an outer cover, it is crucial to account for any movement restrictions to ensure optimal performance.

In applications where the inner media of a steel expansion joint carries significant particulate matter, these particles can accumulate in the bellows' convolutions, potentially causing corrosion or restricting movement. To address this issue, a protective particulate barrier is employed.

Typically made from fiberglass or ceramic fiber—materials well-suited for high-temperature environments—this barrier is installed without compromising the functionality of the steel expansion joint.

The barrier also serves as a thermal insulator, thereby enhancing the overall durability and performance of the joint in demanding industrial settings.