An Advanced Approach to Fitness-For-Service (FFS) and Corrosion ...
An Advanced Approach to Fitness-For-Service (FFS) and Corrosion ...
An Advanced Approach to Fitness-For-Service (FFS) and Corrosion ...
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External <strong>Corrosion</strong><br />
• Location 1: 0-7 Miles<br />
– Depleted ground bed at the start of the line - CP underprotection<br />
– Ground bed <strong>to</strong> be re-instated<br />
• Location 2: 7.2-9.4 Miles<br />
– Coating disbondment<br />
– Rectifier no power (between 2004-2006)<br />
• Location 3: at ~28 Miles<br />
– Two foreign line crossings, potential stray current issue<br />
– Corrosive soil, resistivity of 1000 Ω-cm, poor coating condition<br />
– Rectifier <strong>to</strong> be installed <strong>to</strong> raise potentials, or re-coating of ~5<br />
miles<br />
• Large number of repairs completed including remedial work on<br />
CP system<br />
• A potential disbonded coating issue remains
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