August 29, 2016
A Conclusion: When are Composite Repairs Ideal?

Posted by: Casey Whalen 3:00 minute read

Composite repairs can extend the life of a pipe experiencing cracking, but no significant testing has yet determined its effectiveness. Current standards either do not recommend or allow composite repairs on cracks that have not been removed or terminated. Repairs of non-terminated cracks should be considered on a case-by-case basis.

Composite repairs with a high modulus installed at lowered pressures can decrease stress seen at the crack tip, and compress the cracking region to decelerate crack growth and increase the life of the pipe. Specialized composite repairs focused on compressing the pipe can also be beneficial.

Ideally, a crack will be removed from the pipe by grinding to a repairable remaining wall thickness, allowing a composite repair to be implemented. If the crack tip cannot be removed but a composite repair is still desired, it is essential to constantly monitor the pipe for crack growth, which may still continue, albeit at a slower rate.

MIS is leading the way with composite testing on crack reinforcements through an extensive test program. As it currently stands, MIS has the most testing available in this field, and has also received a PHMSA waiver for a series of upcoming installations.

For more information about MIS engineering and support and how we can assist with your projects, click here.

Category: Feature Articles, Pipe Wrap


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