Petroleum, petrochemical and natural gas industries - Cathodic protection of pipeline transportation systems - Part 2: Offshore pipelines (ISO 15589-2:2012); German version EN ISO 15589-2:2014— 77 стр.
Cathodic protection of buried or immersed metallic structures - General principles and application for pipelines; German version EN 12954:2001— 29 стр.