Assessment of applied pipeline coating system in the U.A.E. corrosive soil condition

Conference · Tue Oct 01 04:00:00 EDT 1996

OSTI ID:370910

Gharra, A

Severe corrosion conditions along many section of the under ground pipeline are evident in the United Arab Emirates due to the hot humid weather and the presence of salty soil beds (Sabkha) associated with high surface water tables. These lines are usually operated at high temperatures (40-60{degrees}C) which accelerate pipe corrosion rates and incorporate potential risks to the pipe coating at Sabkha areas. ADCO experienced several pipeline external corrosion leaks within 3-7 years period of time postline commissioning. Several on-line inspections have been carried out and followed by comprehensive pipeline rehabilitation programmes with significant replacements of corroded pipe sections. Reported external corrosion was mainly due to pipeline coating failure and poor performance of applied CP system. Different cold applied coating repair systems were field tested during 1982-1983 on the main oil lines which were originally coated with hot applied coal tar enamel. The successful types of wrapping were selected for continued implementations. This paper summarises causes of pipeline coating failures and assesses the performance of applied repair coatings which have been in service for more than ten years.

• OSTI ID: 370910
• Report Number(s): CONF-960376--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
36 MATERIALS SCIENCE
CORROSION PROTECTION
FAILURES
LEAKS
PERFORMANCE
PIPELINES
PROTECTIVE COATINGS
STEELS
UNDERGROUND
UNITED ARAB EMIRATES