Here’s How Packed Slip Expansion Joints Work

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Packed Slip Type Expansion Joint

Packed slip expansion joints are one of the most important components of the inner workings of a piping system. They keep thermal piping systems safe and efficient, all while extending its lifespan.

Built to Handle Movement

Piping systems aren’t static. As temperatures rise and fall, pipes expand and contract, and sometimes more than you’d expect. Fortunately, packed slip expansion joints are designed with an inner and outer cylinder that slide smoothly against each other. Between them is a specialized packing material that creates a leak-tight seal while still allowing movement.

The result is controlled flexibility. These joints absorb thermal growth without transferring excessive stress to the piping system, protecting everything from small industrial lines to massive plant infrastructure.

The Secret is in the Packing

The “packed” part of a packed slip expansion joint refers to the sealing system. High-performance packing materials are compressed around the sliding surfaces to prevent leaks while still permitting the slip action. This combination of strength and mobility makes the joint incredibly durable. This is true even under high temperatures and pressure in harsh environments.

What’s more, since the packing is serviceable, these joints are also easier to maintain than many alternatives. Instead of replacing the entire assembly, the packing can often be adjusted or refreshed, extending the lifespan of the joint and reducing downtime.

Why They’re a Smart Choice

Packed slip expansion joints bring more to the table than just movement control. They’re also:

  • Reliable under extreme conditions – designed for high heat, high pressure, and harsh applications.
  • Long-lasting – engineered to minimize wear and deliver decades of performance.
  • Customizable – available in a range of sizes and materials to meet the needs of specific projects.

Packed slip expansion joints are one of the most important components in keeping thermal piping systems safe and efficient. For over five decades, Advanced Thermal Systems has been designing and manufacturing reliable packed slip expansion joints. To learn more about the best options for your piping system, contact us today.