BS EN 13173-2001 近海浮式钢制结构件的阴极保护

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标准号:BS EN 13173-2001
中文标准名称:近海浮式钢制结构件的阴*保护
英文标准名称:Cathodic protection for steel offshore floating structures
标准类型:A29
发布日期:2001/6/15 12:00:00
实施日期:2001/6/15 12:00:00
中国标准分类号:A29
国际标准分类号:47.020.05;77.060
适用范围:This European Standard defines the means to be used to cathodically protect the submerged metallic surfaces of steel offshore floating structures and appurtenances in sea water and saline mud. 1 Structures This European Standard covers the cathodic protection of the external surface of offshore floating structures which are static during their usual operating conditions. This essentially includes: barges, jack-ups, semi-submersible platforms, storage tankers, buoys, etc. It also covers the submerged areas of appurtenances, such as chains, attached to the structure, when these are not electrically isolated from the structure. It does not cover the cathodic protection of ships, fixed offshore structures, elongated structures (pipelines, cables) or harbour installations, which are covered by other standards. This European Standard concerns only the cathodic protection of external surfaces immersed in sea water, including sea chests and water intakes up to the first valve. This European Standard does not include the internal protection of surfaces of any components such as ballast tanks and hull internals of floating structures. 2 Materials This European Standard covers the cathodic protection of structures fabricated principally from bare or coated carbon manganese steels As some parts of the structure may be made of metallic materials other than carbon manganese steels, the cathodic protection system should be designed to ensure that there is a complete control over any galvanic coupling and minimise risks due to hydrogen embrittlement or hydrogen induced cracking (see EN 12473). This European Standard does not cover concrete structures. 3 Environment This European Standard is applicable for the whole submerged zone in sea water, brackish waters, saline mud which can normally be found where the floating structure is anchored, moored or moving. This European Standard is also applicable to appurtenances which may be in contact with muds (e.g. chains). For surfaces which are alternately immersed and exposed to the atmosphere, the cathodic protection is only effective when the immersion time is sufficiently long for the steel to become polarised. 4 Safety and environment protection This European Standard does not cover safety and environmental protection aspects associated with cathodic protection. The relevant national or international regulations shall apply.

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