Walker Technical
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Mechanical Testing

 

The primary aim of the mechanical testing programme is to generate long term data for the Technowrap 2Kô repair material so that when we claim a 20 year lifetime we have data to present that justifies our claims.

There are 4 main long term testing projects;

Long term testing on through wall defects
Long term testing on through wall defects
Long term testing on the strength of the material
Long term testing on the strength of the material
Long term testing on the repair of external defects
Long term testing on the repair of external defects

 

 

Long term testing on through wall defects

This is performed in our test cabin in Aberdeen (sponsored under the IMAJINE project). To date the conclusions of these long term tests (on carbon steel pipe sections) confirm the energy release rate that is used in design calculations is approximately 25% conservative.

Long term testing on the strength of the material

This is performed at Newcastle University. To date the strength tests confirm that our design calculations are approximately 300% conservative. It should be noted that most designs are controlled (i.e. the repair thickness) by the adhesion of the repair to the substrate rather than the limitation on load carrying capability of the composite material.

Long term testing on the repair of external defects

This is performed at Stress Engineering in Houston. Test spools with external defects up to 80% wall loss are maintained at constant pressure and buried. This project duration is 3 years and has been running for 1 year. The test results from pipe samples under pressure for the first year should be released imminently.

Long term testing on the interlamina strength

The interlamina strength of the composite material is the resistance of the material to in-plane shear loads. These tests were performed at the Gas Technology Institute in Chicago. The tests are complete and the results from our repairs were excellent. Interpreting the data presented in the draft final report the long term interlamina strength of our repair system was the highest of all repair samples tested.