Pipeline transport in order to avoid melting the frozen ground by hot petroleum which would result in sinking the pipeline in the ground. Maintenance of pipelines includes checking cathodic protection levels for the proper range, surveillance for construction, erosion, or leaks by foot, land vehicle, boat, or air, and running cleaning pigs, when there is anything carried in the pipeline that is corrosive. US pipeline maintenance rules are covered in Code of Federal Regulations(CFR) sections, 49 CFR 192 for natural gas pipelines, and 49 CFR 195 for petroleum liquid pipelines. In the US, onshore and offshore pipelines used to transport oil and
Escravos–Lagos Pipeline System Escravos–Lagos Pipeline System The Escravos–Lagos Pipeline System (ELPS) is a natural gas pipeline built in 1989 to supply gas from Escravos region of Niger Delta area to Egbin power station near Lagos in Nigeria. Subsequent spur lines from the ELP supply Delta power plant at Ughelli, Warri Refining and Petrochemical Company at Warri, the West African Portland Cement (WAPCO) Plants at Shagamu and Ewekoro, industries at Ikorodu, City Gate in lkeja Lagos. Since the NIPP power plants emerged ELPS is the major gas supply artery to the power plants in Nigeria. The diameter of the main part of pipeline from