Installation of Zinc Ribbon & Arc Strike Inspections on HP Pipeline PO86.

All of the team have been working at Crowthorne, on the zinc ribbon installation. The reason for the zinc ribbon installation is to depreciate the AC current on the HP pipeline. We have installed the zinc ribbon parallel to the pipeline on both sides & at pipe depth. Pipeline was exposed at 20 metre intervals, making sure that the pipeline was supported in 3 metre sections. Arc strike inspections were carried out by the client, if there had been any arc strikes present then a P11 assessment would be carried out, the results of this would determine whether this section of pipeline would require blasting and recoating.

The digging methodology used on this project was a stepped battered excavation, hand digging within 1 metre from the side of the pipeline, due to the project being under SW2 permitry.



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