The Cross Island Pipeline (CIP) consists of approximately 76.5 kilometers of 56-inch natural gas pipeline from Beachfield to Point Fortin and originally designed with a total of 2.8 kilometers of continuous concrete weight coat for buoyancy control. Alternate design and construction techniques were used to improve the efficiency of the pipeline construction methods used for the concrete coated sections. In areas where temporary work space was limited due to the crossing of foreign pipelines; or where induction bends were installed; or where the 56” pipeline closely paralleled existing pipelines, an alternate method of weighting had to be considered. Bechtel proposed alternative methods for buoyancy control such as installation of Concrete Strap-On Weights and the use of Geotextile Buoyancy Control Saddle Weights.
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Buoyancy Control on the 56” Cross Island Gas Pipeline Project, Trinidad and Tobago
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Hernandez, LA. "Buoyancy Control on the 56” Cross Island Gas Pipeline Project, Trinidad and Tobago." Proceedings of the 2006 International Pipeline Conference. Volume 1: Project Management; Design and Construction; Environmental Issues; GIS/Database Development; Innovative Projects and Emerging Issues; Operations and Maintenance; Pipelining in Northern Environments; Standards and Regulations. Calgary, Alberta, Canada. September 25–29, 2006. pp. 121-127. ASME. https://doi.org/10.1115/IPC2006-10099
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