HOIS/NZTC Guidance on Inspection of Uninsulated External Corrosion Scabs – HOIS-G-028 Issue 2

HOISG028

HOIS/NZTC Guidance on Inspection of Uninsulated External Corrosion Scabs – HOIS-G-028 Issue 2
Author:
M Jones and S F Burch
Publisher:
HOIS
Volume:
1
Binding:
e-publication, 83 p, February 2022
The present document provides guidance on the inspection of uninsulated external corrosion scabs, based on the results from four series of trials performed in HOIS projects and other information obtained during these HOIS projects.
This guidance aims to provide operators and NDT service providers with current relevant information on the available NDT methods for in-service determination of the minimum remaining ligament for external corrosion scabs on live lines where it is hazardous to remove the scale/corrosion product to obtain direct access to the underlying steel surface. This should lead to a more consistent approach across the industry.

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