The above video was filmed at Sylmasta HQ in the United Kingdom and demonstrates how to make a permanent repair to a threaded joint in a high pressure pipe resistant to 10 bar whilst water leaks through.

Before application, pressure is reduced through the pipe as much as possible to improve adhesion between the pipe and Superfast Steel Epoxy Putty.

Enough Superfast Steel is mixed by hand to cover the threaded joint around the entire pipe diameter. This mixed putty is then placed to one side.

One 25mm x 2m Wrap & Seal Pipe Burst Tape is wrapped next to the thread until enough layers are built to create a rubber ridge level with the female fitting.

Once this ridge has been created, the mixed Superfast Steel is formed into a long sausage shape. It is then applied directly over the threaded joint, into the gap between the Wrap & Seal ridge and female fitting.

Further Wrap & Seal is added, initially over the ridge. This new application amalgamates to the ridge in the same way the tape bonded with itself originally.

Wrapping then moves over the Superfast Steel, helping to force the epoxy putty deeper into the threaded joint. Once the full Wrap & Seal roll is completed, the repair is smoothed by hand to further push down the epoxy putty.

One 50mm x 4m Wrap & Seal is then applied directly over the threaded joint. It fuses with the tape already on the pipe, increasing the strength of the repair.

The elastic force of the combined multiple layers of Wrap & Seal exerts maximum pressure resistance over the threaded joint, ensuring all leak paths are sealed by either epoxy putty or tape in a belts-and-braces repair.

After application, the repair is left for one hour to allow Superfast Steel to cure and Wrap & Seal to bed in. The pipe in question can then be repressurised back to regular operating conditions.

This repair method was formulated after a client approached Sylmasta needing to seal a threaded pipe joint in a high pressure line which could not be fully isolated.

Any repair needed to be effective whilst water leaked through. It also had to withstand fluctuations up to 10 bar when the system was fully pressurised.

We constructed a test rig replicating the pipe in question. After the application, we pressure tested the repair to 10 bar. There were no signs of any leakage or deformation. We then added instructional captions to the video to provide visual training for the client.

Although the client was not working with drinking water, both Wrap & Seal and Superfast Steel are WRAS approved. This repair method can be used to seal leaking threads on pipes carrying potable water.

Product

Superfast Steel
Fast working epoxy putty forced into where it cures to form a rock hard material

Wrap & Seal Pipe Burst Tape
Self-amalgamating tape fuses to form a solid rubber band sealing leaks and removing step

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