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.

Cross References:
EN 10163-1
EN 10079
ISO 4063
ISO 9712
EN ISO 2566-1
EN ISO 14284
EN ISO 377
EN 10027-1
EN 10029
EN 1011-1
ISO 148-1
ISO 3452-1
ISO 6892-1
ISO 14284
EN ISO 4136
EN ISO 6892-1
EN ISO 15614-1
EN 10168
ISO 9934-1
ISO 377
EN ISO 6947
ISO 643
ISO 4885
EN 10027-2
EN ISO 3452-1
ISO 15653
ISO 12135
ISO 15614-1
ISO 6947
EN 10051
ISO 2566-1
ISO 4136
EN ISO 9934-1
EN ISO 4885
EN ISO 9712
EN ISO 4063
EN 10163-2
EN 10020
ISO 6507-1
EN ISO 6507-1
EN 10164
EN 10160
EN 10021
EN ISO 643
ISO 11484
CEN/TR 10261
EN ISO 148-1
EN 10204
EN 1011-2:2001
EN 10025-6
EN 10025-2
EN 10025-3
CEN/TR 10347
EN 10025-4
EN 10025-1


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