Rehab projects use current stripping and coating procedures

Journal Article · Mon Mar 11 04:00:00 EST 1991 · Oil and Gas Journal; (USA)

OSTI ID:5805668

Bacon, D A ^[1]

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1. Enron Corp., Houston, TX (US)

Pipeline-coating failures on the systems operated by a company in Houston, have led to a number of rehabilitation projects in the past 24 months. Using commercially available methods and technology, the company selected a rehabilitation approach suitable to each failure. In some cases, stress-corrosion cracking (SCC) had developed. In others, general corrosion and pitting corrosion affected the serviceability of the pipe. Excavating the pipelines allowed them to determine the cause of the coating failure in most cases. Severe soil stresses due to clay soils' shrinking and swelling caused by wetting and drying were factors in a number of the coating failures. In other cases it was evident that coal-tar coatings had been over cooked and sometime backfilled before the coal tar had cooled sufficiently, as indicated by the dirt in direct contact with the pipe metal. Some recent projects illustrate philosophy and procedures. Rehabilitation as a result of external corrosion is discussed.

• OSTI ID: 5805668
• Journal Information: Oil and Gas Journal; (USA), Journal Name: Oil and Gas Journal; (USA) Vol. 89:10; ISSN OIGJA; ISSN 0030-1388
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
022000* -- Petroleum-- Transport
Handling
& Storage
COATINGS
CORROSION PROTECTION
ENERGY SOURCES
FOSSIL FUELS
FUELS
PETROLEUM
PIPELINES
PROTECTIVE COATINGS
RETROFITTING
TRANSPORT