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DEVELOPMENT OF TESTING FACILITY TO INVESTIGATE GRE PIPES BEHAVIOR IN HARSH ENVIRONMENT

Oil and gas transmission pipes are made from metal or plastic tubes with inner diameters range from 4 to 48 inches (100 to 1,200 mm). Although carbon steel pipelines have been traditionally used in Oman, advanced composites are also introduced on limited scales. In Oman, the analysis of oil and gas pipelines failure that has been performed since 2007 has shown a relatively high incident of failure rate with carbon steel pipelines. A large percentage of the incidents involved were classified as pipe corrosion failure due to the harsh and corrosive environments (including high percentage of Hydrogen sulfide, H2S). In this work, an in-house testing facility under controlled conditions has been developed in order to perform design verifications for the GRE pipes that will be used in oil and gas transmission lines in Oman according to the ASTM and ISO Standards. Two pipes are placed in an oven at a temperature of 65 o C and internal pressure of 130 Bars. One pipe contains water and the other crude oil with different H2S concentrations (100 ppm, 300 ppm and 1000 ppm). The pipe has been left for a period of 1000 hours and will be taken for mechanical and material testing to assure performance and the relevant pipes design specifications.