Page 436 - Pipelines and Risers

Design Codes and Criteria for Risers 403

Table 21.4 Load cases definition I.

A3 PLS PIS: Vessel damaged at 14 Deg. Tilt, Corresponding to the vessel at positions
Hdrn of NEAR and FAR
A4 PLS PLS: Intact Corresponding to the vessel at positions
10,000 year wave + of NEAR, FAR and TRANSVERSE
10 year current Riser empty at TRANSVERSE case

Table 21.5 Laad cases definition 11.

~~ ~
Loadcase
-
No.
N3

N4

100 year current
AS PLS PLS: Single line failure Corresponding to the floater at
10 year wave + positions of NEAR, FAR and
TRANSVERSE
100 year current

21.4.5 Load Factors
Appropriate load factors shall be applied for riser design. For specified design case, those
factors can be calibrated based on, for instance, detailed FEM analysis and reliability
methodology. To back this calibration, the details should be documented for verification.