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This part of ISO 15589 specifies requirements and gives recommendations for the pre-installation surveys, design, materials, equipment, installation, commissioning, operation, inspection, and maintenance of cathodic protection systems for on-land pipelines. On-land pipelines are defined in ISO 13623 or EN 14161 for the petroleum, petrochemical, and natural gas industries. They are also described in EN 1594, EN 12007 1 and EN 12007-3, which are used by gas supply industries in Europe. This part of ISO 15589 is applicable to on-land pipelines and piping systems used in other industries and transporting other media such as industrial gases, waters, or slurries. Throughout this document on-land pipelines means: — pipelines that are buried, — landfalls of offshore pipeline sections protected by onshore based cathodic protection installations, — immersed sections of on-land pipelines such as river or lake crossings. This part of ISO 15589 specifies requirements for pipelines of carbon steel, stainless steel, cast iron, galvanized steel, and copper. If other pipeline materials are used, the protection criteria to apply shall be the responsibility of the pipeline operator. This part of ISO 15589 does not apply to pipelines made of reinforced concrete. ISO 12696 can be applied to reinforced concrete. Note Special conditions sometimes exist where cathodic protection is ineffective or only partially effective. Such conditions can include shielding (e.g. disbonded coatings, thermal-insulating coatings, rocky soil, weight saddles and non-conducting support cushions.) and unusual contaminants in the electrolyte.