Once a system has its general qualification, a project-specific validation is performed. The extent of this validation depends on how much the specific project deviates from the essential variables covered in the general qualification. This efficient approach avoids having to re-qualify a system from scratch for every new project.

DNV regularly updates RPs based on joint industry projects (JIPs). Anticipated changes to F118 include:

Technological innovation continues. For example, a 2024 paper presented at a major industry conference compared traditional welded repair methods with novel subsea connectors for corrosion-resistant alloy (CRA) clad pipelines. These new connectors, designed to be qualified according to demanding DNV rules, offer faster, more reliable, and potentially less costly repair options. DNV is also modernizing its Recommended Practice on Pipeline Subsea Repair (RP-F113), formalizing criteria and procedures for these new approaches.

It mandates consideration of:

DNV-RP-F118, Pipeline Geohazard, Ground Movement, Strain-Based Design, Landslide, Fault Crossing, Subsea Pipeline Integrity.

This qualification is not a one-time event; it is a two-stage process:

Detecting a defect is only half the battle; accurately determining its size is crucial for assessing its severity. This RP specifically addresses a system's ability to measure the dimensions of a flaw. These measurements are fed into an Engineering Critical Assessment (ECA) , which determines whether a flaw is acceptable or if the weld must be repaired. ECA training courses often incorporate DNV-RP-F118 to derive weld repair acceptance criteria.

Officially titled "Risers for Floating Production Units" , this Recommended Practice (RP) from DNV (Det Norske Veritas) has become the global benchmark for the design, fabrication, testing, and installation of riser systems.

You can find the officially binding documents directly at DNV - Global.

The critical buckling load of the inner pipe within the tight confines of the outer pipe.

Meet the strict entry-into-force requirements of DNV Offshore Rules .