This guide is intended to enable OSD inspectors to make consistent judgement on the extent of external corrosion related to the installation’s hydrocarbon systems. The guide identifies a sample of six common forms of external corrosion and provides information on :
- where to look; and
- what to look for.
The six areas of concern are :
- corrosion under insulation (CUI);
- firewater mains and deluge system;
- flanges and plant bolting;
- valves;
- pipe supports and pipe coatings; and
- threaded plugs.
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