Perhaps one of the most important safe guards put in place to maintain the long-term integrity of buried pipelines is a cathodic protection system. Cathodic protection (CP) is an anti- corrosion technique used to prevent the corrosion of metals such as steel and iron in electrolytically conducting environments such as seawater and soils containing water.
Landlocked Bolivia is unique among nations for many reasons, not the least of which is its wide range of terrains, climates and biodiversity, which are in turn a consequence of precipitous altitude changes within the country. From Andean glaciers to Amazonian rain forests, the country is a patchwork of varying elevations, including dozens of active and extinct volcanoes and innumerable rivers.
This case study describes the design and commissioning of an impressed current cathodic protection (CP) system for a 10-inch OD, 106.2-mile welded steel pipeline with a three-layer coating system. It describes the adventures of cross-cultural technical communications, differences in equipment specifications and understanding and conducting the survey in the lush green mountains of southern China in torrential rains and lightning storms.
Cathodic protection has come a long way from its manual beginnings. Operators in industrial markets are seeking the most effective and efficient ways to protect assets and infrastructure from corrosion. Many are finding that automated solutions can provide the reliable, real-time monitoring they seek. New technologies and options are continually being introduced to the marketplace.
Today, the use of a durable external coating system in combination with cathodic protection is well-accepted as the most effective means of corrosion prevention for oil and gas pipelines.
Cathodic potential (CP) criteria are used as a recommended minimum requirement for controlling external corrosion of buried or submerged steel piping systems. Different and sometimes conflicting CP criteria are given in different global CP standards. This can lead to confusion regarding what criterion is best used for a given condition.
The Keystone Pipeline is a 2,147-mile (3,456-km) pipeline that transports crude oil from Hardisty, Alberta, to U.S. Midwest markets at Wood River and Patoka in Illinois, and ultimately to Cushing, OK.
On June 30, 2010, TransCanada (TCPL) began commercial operation of the first phase of the Keystone Pipeline System.
Cathodic protection (CP) has slowly become a critical issue in America and beyond. The catalysts for this are: (1) new governmental regulations, (2) stiff penalties for non-compliance, (3) the aging of buried metal assets, and (4) increased scrutiny in the public and private sectors seeking efficiency and the protection of assets.
MATCOR®, Inc., a leading cathodic protection and corrosion prevention engineering design firm, has announced the appointment of Jeffrey Stello as president and CEO. Stello assumes the responsibilities held for nearly 35 years by founder William Schutt, who will continue with the company as chairman.
Operators are facing increased direct current (DC) interference issues due to denser pipeline networks. Furthermore, alternating current (AC) corrosion effects are augmented within more and more complex utilities corridors.
Transportadora Brasileira Gasoduto Bolívia-Brasil S.A. (TBG) is saving about US$32,600/month in maintenance costs by employing a remote technique to monitor the cathodic protection system on the GASBOL pipeline.
Baker Hughes Pipeline Management Group (PMG) has published a brochure devoted to its CPCM™ cathodic protection inspection services.