Composite wrap being used to repair metal pipes

A composite wrap is being used to repair metal pipework on site without the need of hot curing.

The SuperWrap II, by Harrogate based Belzona, has been optimised for use on a variety of difficult geometries including bends, straights and tees, tank walls and can also be used as a patch repair on larger diameter pipes. The resulting repair is expected to last in excess of 15 years.

The material used is a bespoke hybrid fabric combining glass and carbon fibres. Glass fibres give the sheet flexibility and act as a wet out indicator, while carbon fibres provide the strength needed to withstand the high pressures and mechanical loading.

It uses a cold curing fluid grade epoxy resin available for both cool ambient temperatures (from 5°C up to 60°C) and warmer ambient temperatures (20°C up to 80°C). Interestingly, the SuperWrap II has been designed to have a similar thermal expansion coefficient to steel, meaning both substrates will expand and contract at a similar rate, avoiding stress and fatigue building up between the substrantes.

The SuperWrap II also overcomes a common problem encountered by engineers when repairing pipework – the pressure within the pipe acting on the defect area causing the repair material to bend or bulge. However, by having a high Young's modulus of approximately 38000 MPa, the material retains an extremely high level of stiffness and resistance to bending forces.

Justin Cunningham

This material is protected by MA Business copyright
See Terms and Conditions.
One-off usage is permitted but bulk copying is not.
For multiple copies contact the sales team.


Supporting Information
Do you have any comments about this article?

Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

© MA Business Ltd (a Mark Allen Group Company) 2020