This document describes technical measures to be carried out at crossings and parallelisms of buried metal pipelines influenced by HVDC systems. It provides guidance on how the design, construction, operation, maintenance, and decommissioning phases of HVDC systems affect buried metal pipelines. Electrical interference conditions (AC and DC) to pipeline systems are described, and acceptable levels of interference are discussed. Minimum separation distances are recommended. The following aspects are not covered in this document: -Contractual responsibilities -Personnel safety