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
NEL pipeline asked exemption from the network access and transit fees regulation; however, this request was denied. The pipeline was built by OPAL NEL TRANSPORT GmbH. It is operated by NEL Gastransport GmbH, indirectly owned by WIGA Transport Beteiligungs-GmbH & Co. KG, a joint venture of Wintershall and Gazprom. NEL pipeline The NEL (Nordeuropäische Erdgasleitung (English: Northern European natural gas pipeline), formerly known as Norddeutsche Erdgasleitung, is a long natural gas pipeline in Germany. The pipeline runs from Lubmin near Greifswald through Sülstorf and Achim to Rehden. It connects the Nord Stream pipeline with the Rehden-Hamburg and MIDAL pipelines. The pipeline started