The Nord Stream pipeline system has secured a new certificate from offshore oil and gas industry certifying body DNV GL for a five-year period until 2022.

The certificate confirms the continued integrity of the pipeline system through the Baltic Sea during this period.

DNV GL previously issued the initial certificate for the pipeline at the start of operation in October 2012, confirming its full compliance with the requirements of the offshore standard DNV OS-F101 for submarine pipeline systems.

For the last five years, Nord Stream has worked alongside the certifying body’s experts regarding the development of its pipeline integrity management system, verification, as well as monitoring of its operating and maintenance procedures.

Nord Stream AG compliance director Mario Nullmeier said: “DNV GL provides us with the highest level of expertise in the field of overseeing offshore pipeline operation.

“The consortium has invested an aggregate amount of €7.4bn in the project and operates two 1,224km natural gas pipelines through the Baltic Sea.”

“We are very happy to have this renowned international company verify the continuous integrity of our infrastructure, which ensures reliable and safe transportation of natural gas from Russia to Europe.”

Based in Switzerland and established in 2005, Nord Stream is an international consortium of five major companies, including Gazprom, Wintershall Holding, PEG Infrastruktur, Nederlandse Gasunie and Engie.

DNV GL Oil & Gas Russia & Kazakhstan vice-president Nils Andreas Masvie said: “We have been able to examine the key steps in the process and have visibility of compliance-related activities that enable DNV GL to confirm the Nord Stream Pipeline’s continued integrity.”

The consortium has invested an aggregate amount of €7.4bn in the project and operates two 1,224km natural gas pipelines through the Baltic Sea.

Designed to operate for at least 50 years, the pipelines became operational in 2011 and 2012 respectively, and have the capacity to transport a combined total of approximately 55 billion cubic metres of gas a year.