Dnv-rp-f118 ((free)) May 2026

DNV-RP-F118 is a technical "Recommended Practice" titled "Pipe girth weld automated ultrasonic testing system qualification and project specific procedure validation."

: The system must accurately size flaw length and height, often using advanced techniques like "Tip Echo" assessments or "MaxAmp" for embedded flaws. Safety is Standardized dnv-rp-f118

In the world of offshore pipelines, the integrity of a girth weld isn’t just a technical requirement—it’s a lifeline for safety and environmental protection. Ensuring these welds are flaw-free falls heavily on Automated Ultrasonic Testing (AUT) dynamic analysis may be needed.

• Damage assessment of dents, scratches, corrosion, and ovality
• Acceptance criteria based on remaining strength and fatigue life
• Repair decision support – when to monitor, repair, or replace

Forward-looking operators should already be piloting these technologies to stay ahead of the next revision. Damage assessment of dents

• Recommended Practice, not a Standard: F118 is advisory. Contractual adoption is required for enforceability.
• Requires Expert Input: Proper use demands close collaboration between pipeline engineers and engineering geologists.
• Not for Fast Transient Events: Very high-velocity landslides or debris flows may exceed the quasi-static assumption; dynamic analysis may be needed.

Proving the general capabilities of a new or modified AUT system. Project-Specific Validation:

While basic statistical confidence might start at 29 samples, RP-F118 often requires significantly more—sometimes upwards of 91 samples for complex weld types like double V submerged arc welds—to provide adequate evidence of detection. Document Evolution

: Establishing clear records during engineering and construction. Trial Welds