EN ISO 19900:2019 PDF

Overview

EN ISO 19900:2019 (ISO 19900:2019) establishes the general requirements and recommendations for the design and assessment of offshore structures used in the petroleum and natural gas industries. It applies to both bottom-founded (fixed) and buoyant (floating) structures across all life phases - fabrication, transportation, installation, in‑service operation (including life extensions), and decommissioning/removal. The standard covers new-build design as well as structural integrity management and assessment of existing platforms. It does not apply to subsea/riser systems or pipeline systems.

Keywords: ISO 19900, offshore structures, petroleum and natural gas industries, design and assessment, structural integrity.

Key Topics and Technical Requirements

• Fundamental requirements for structural integrity, functionality, durability and robustness throughout the structure’s life cycle.
• Basis for design/assessment: site location, orientation, physical environmental conditions and geotechnical/geophysical investigation requirements.
• Development of design/assessment situations including classification of hazards, exposure levels, and operational/abnormal/extreme/accidental situations.
• Limit state verification framework covering ultimate, serviceability, fatigue and accidental limit states; procedures for verification and representative values.
• Actions and loading: classification and representative values for permanent, operational, environmental and accidental actions, and repetitive loading relevant to offshore platforms.
• Design values and partial factors covering actions, resistances and combinations for limit state checks.
• Specific design considerations referenced for topsides, deck elevation, splash zone, stationkeeping systems, foundations/anchoring and conductor/ structural interfaces.
• Requirements for planning, construction, deployment, inspection, maintenance and decommissioning to support durability and structural integrity management.

Keywords: limit states, environmental actions, design values, partial factors, fatigue, geotechnical conditions.

Practical Applications

• Establishing the design basis and verification approach for new offshore platforms (fixed or floating).
• Conducting structural integrity assessments and fitness‑for‑service evaluations for existing installations and life‑extension projects.
• Developing inspection, maintenance and decommissioning plans consistent with durability and robustness requirements.
• Supporting regulatory compliance, class society certification and operator risk management by defining actions, combinations and limit‑state procedures.

Keywords: structural integrity management, life‑cycle, inspection, decommissioning, offshore platform design.

Who Should Use This Standard

• Offshore structural, marine and civil engineers
• Asset owners and operators in the petroleum and natural gas industries
• Class societies and regulatory authorities
• Inspection, maintenance and integrity management teams
• Fabricators and contractors involved in construction, transport and installation

Related Standards

This document is the general‑requirements reference in the ISO/CEN offshore standards family and is typically used alongside platform‑type and discipline‑specific standards and guidance for metocean, geotechnical and equipment design.

Keywords: ISO offshore standards, EN ISO 19900, offshore design guidance.