本文件规定了用于制造固定海洋结构物的热加工无缝和高频焊接空心型材制成的可焊接结构钢的要求。本标准规定了以下厚度限制:-65 mm及以下无缝空心型材；-对于小于等于25.4 mm的HFW空心截面。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洋结构物用钢，但不适用于制造海底管道、立管、工艺设备、工艺管道和其他公用设施用钢。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E。最低屈服强度高达770兆帕，并规定了在-40℃以下的冲击性能。

This document specifies requirements for weldable structural steels made of hot finished seamless and high frequency welded hollow sections to be used in the fabrication of fixed offshore structures. The following thickness limitations are given in this standard: - for seamless hollow sections up to and including 65 mm; - for HFW hollow sections up to and including 25,4 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 but not to steels 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 E on the prequalification of steels for fixed offshore structures in arctic areas. Minimum yield strengths up to 770 MPa are specified together with impact properties at temperatures down to -40 °C.