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D400: Fracture mechanics (FM) testing [Table of Contents] Sec.5: Structural Strength

DNV-OS-C201 Structural Design of Offshore Units (WSD method)

[-] Sec.4: Structural Categorisation, Material Selection and Inspection Principles
[-] D: Structural Steel
[-] D500: Post weld heat treatment (PWHT)

Sec.4
D 500   Post weld heat treatment (PWHT)

Sec.4 D
501   For units which are intended to operate continuously at the same location for more than 5 years, PWHT shall be applied for joints in C-Mn steels in special areas when the material thickness at the welds exceeds 50 mm. For details, see DNV-OS-C401 Ch.2 Sec.1 F200.

If, however, satisfactory performance in the as-welded condition can be documented by a fitness-for-purpose assessment applying fracture mechanics testing, fracture mechanics and fatigue crack growth analyses, PWHT may be omitted.

D400: Fracture mechanics (FM) testing [Table of Contents] Sec.5: Structural Strength