to establish expected ductility. Unlike older versions that often targeted a flat ratio of 2.0, RP 2EQ allows for regional variations based on specific risk assessments.
API RP 2EQ is designed to be used exclusively with the 22nd Edition of API RP 2A-WSD and later. It replaces the seismic design sections (formerly Section 2.3.6) of older RP 2A editions. 2. Core Seismic Design Framework
RP 2EQ utilizes updated worldwide offshore maps (Annex B) and site-specific seismic zones that supersede the outdated figures in RP 2A 21st Edition. Reserve Capacity Factor ( Crcap C sub r ): The standard introduces Crcap C sub r api rp 2eq pdf updated
: The primary source for the official 1st Edition (R2021).
The Bureau of Safety and Environmental Enforcement (BSEE) and other global regulators frequently incorporate API RP 2EQ by reference, making it a legal requirement for many offshore operations. Crcap C sub r factors used in RP 2EQ versus the old RP 2A guidelines? to establish expected ductility
For high-exposure structures or high-seismic zones, a Probabilistic Seismic Hazard Analysis (PSHA) is now more strictly required than in previous decades. 4. How to Access the Latest PDF
The is the industry-standard document for ensuring the structural integrity of offshore platforms in seismically active regions. As of early 2026, the current version remains the 1st Edition (2014) , which was officially reaffirmed in 2021 . This standard is a modified adoption of ISO 19901-2 , specifically tailored for the United States Offshore Continental Shelf (U.S. OCS). 1. Key Updates and Current Status (2026) It replaces the seismic design sections (formerly Section 2
This update introduced minor technical corrections and refined specific seismic risk parameters to better align with evolving metocean data.
While the base document was published in 2014, several critical updates have occurred through addenda and reaffirmations:
: Provides the most recent PDF versions including all supplements and errata.