After lunch,i will share BS EN 10225-4:2019,Weldable structural steels for fixed offshore structures—Technical delivery conditions—Part 4:Cold formed welded hollow sections.
This document, together with EN 10225-1: 2019, EN 10225-2: 2019, and EN 10225-3: 2019, supersedes EN10225:2009.
This European Standard consists of the following parts, under the general title “Weldable structural steels for fixed offshore structures- Technical delivery conditions”:
Part 1: plates
Part 2: Sections
Part 3: Hot finished hollow sections
Part 4: Cold formed welded hollow sections
In comparison to the previous edition following technical changes were made:
—welded cold formed hollow sections were only implicitly mentioned in the previous version.Because of the split of the standard into four parts now a separate part with full requirements to cold formed hollow sections for offshore structures is written:
—the steel names were adapted to en 10027-1；
—former grades of group 3 are no longer listed, new options with the same enhanced properties have been introduced (Options 2 and 3)；
—there is an Annex E concerning SAWH hollow sections and an Annex F concerning high strength square and rectangular HFW hollow sections, since the application of these hollow sections need more practical experience；
—an informative Annex G was added for the prequalification of steels for fixed offshore structures in arctic areas.
BS EN 10225-4:2019 specifies requirements for submerged arc welded and high frequency welded
cold formed hollow sections to be used in the fabrication of fixed offshore structures.
PS:Due to copyright issues, this standard file cannot be downloaded. so sorry.