本文件规定了用于制造固定海洋结构物的可焊接结构钢（钢板形式）的要求。本标准规定了以下厚度限制:-S355NLO小于等于200 mm；-S355MLO、S420MLO、S460MLO、S500MLO，小于等于120 mm；-S420QLO、S460QLO、S500QLO、S550QLO、S620QLO、S690QLO，小于等于150 mm。如果保持本欧洲标准的技术要求，则可以商定更大的厚度。本欧洲标准适用于设计用于海上作业的海上结构用钢，包括结构空心截面板（见EN 10225-4）。不适用于为制造海底管道、立管、工艺设备、工艺管道和其他公用设施而提供的板材。它主要适用于北海地区，但也可能适用于其他地区，前提是适当考虑当地条件，例如设计温度。注:本文件有一个关于北极地区固定式海洋结构物用钢的资格预审的资料性附录F。规定的最小屈服强度高达690兆帕，以及温度低于-40°C时的冲击性能。

This document specifies requirements for weldable structural steels, in the form of plates, to be used in the fabrication of fixed offshore structures. The following thickness limitations are given in this standard: - S355NLO up to and including 200 mm; - S355MLO, S420MLO, S460MLO, S500MLO up to and including 120 mm; - S420QLO, S460QLO, S500QLO, S550QLO, S620QLO, S690QLO up to and including 150 mm. Greater thicknesses can be agreed, provided the technical requirements of this European Standard are maintained. This European Standard is applicable to steels for offshore structures, designed to operate in the offshore sector, including plate for structural hollow sections (see EN 10225-4). It does not apply to plates supplied for the fabrication of subsea pipelines, risers, process equipment, process piping and other utilities. It is primarily applicable to the North Sea Sector, but may also be applicable in other areas provided that due consideration is given to local conditions e.g. design temperature. NOTE This document has an informative Annex F on the prequalification of steels for fixed offshore structures in arctic areas. Minimum yield strengths up to 690 MPa are specified together with impact properties at temperatures down to -40 °C.