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Integrity & Repair

Allan Edwards Compression Sleeve

Engineered With Purpose.

The critical role that pipelines occupy in today’s society demands that the repair solutions that service them be both reliable and effective. With so many complex anomalies that threaten the productivity of a line, we’ve made it a priority to provide a dynamic range of repair solutions to address many of these issues. Our compression sleeve inhibits cracks and crack-like features that threaten the integrity of a pipeline.

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What It Does & Why It’s Different

The same time-tested, reliable steel repair sleeves that Allan Edwards has utilized for the past 70 years make up an integral component of our Compression Sleeve system.  This sleeve inhibits further growth of cracks or crack-like features in pipe. Because no circumferential welds are required, this Type A compression sleeve can be placed directly over pipe laminations, bypassing the limits of traditional Type B repair sleeves for maximum effectiveness.

While we don’t claim to offer the only compression sleeve on the market, we do claim a unique sleeve-heating method: induction heating. By eliminating the need for an open flame, we accomplish two things: we remove a potential workplace hazard, and we ensure measurable and controllable heat input.

How Does the Compression Sleeve Work?

Two halves of Allan Edwards steel repair sleeve are placed on either side of the pipe and secured with hydraulic jacks. Heat induction (up to 400°F) applied across the sleeve induces sleeve expansion. While the sleeve is in the expanded state, tack welds are performed, followed by side welds for final completion. Once the sleeve cools, the pipe is put into a state of compression, inhibiting growth of crack features and thereby reducing stresses in the base pipe.


Allan Edwards compression sleeve
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Allan Edwards compression sleeve

Compression Sleeve

Features & Advantages

  • Induction heating ensures measurable and controllable heat input
  • No outer backing bar required
  • No open flame in the ditch
  • Compression treatment inhibits growth of cracks & crack-like features
  • Suitable for placement directly over pipe laminations
  • Reduces risk by not requiring circumferential welds
  • Convenient, local in-house or on-site training available
  • Manufactured & shipped locally