Overview
EN ISO 27913:2025 (adoption of ISO 27913:2024, corrected version 2025‑09) covers requirements and recommendations for the pipeline transportation of CO2 streams from capture sites to geological storage or other uses (e.g., enhanced oil recovery). It applies to rigid metallic onshore and offshore pipeline systems, conversion of existing pipelines for CO2 service, and transport of CO2 in gaseous and dense phases. The standard also addresses CO2 stream quality assurance, convergence of streams from multiple sources, and health, safety and environmental (HSE) aspects specific to CO2 pipeline transport. Transportation by ship, rail or road is not covered.
Key topics and technical requirements
The document provides guidance and requirements across the lifecycle of CO2 pipeline systems, including:
- CO2 stream properties: thermodynamics, chemical reactivity, impurities and effects on materials and flow behaviour.
- Design principles and concept development: safety philosophy, reliability, availability, access and short‑term storage reserves.
- Flow assurance: single‑phase and transient multi‑phase operations, hydrate avoidance, water content limits, and reduced capacity scenarios.
- Materials and corrosion management: steel selection, non‑metallic materials, coatings, lubricants and internal corrosion mitigation.
- Mechanical design: wall thickness calculations, dynamic pressure changes, and fracture considerations for gaseous and dense phases.
- Pipeline layout and components: block valves, vent stations, compressor/pump stations, in‑line inspection provisions, and onshore/offshore vent facility considerations.
- Operations and monitoring: leak detection, fugitive emissions control, pressure control/protection systems, and CO2 stream quality assurance.
- Conversion of existing pipelines: considerations for repurposing pipelines for CO2 service and blending/converging multiple CO2 sources.
- HSE and regulatory alignment: CO2‑specific health, safety and environmental management and monitoring requirements.
Applications and users
EN ISO 27913:2025 is intended for professionals and organizations involved in CCUS (carbon capture, utilization and storage) and CO2 pipeline projects, including:
- Pipeline designers and engineers
- CCUS project developers and operators
- Materials and coating suppliers
- Safety, environmental and compliance specialists
- Regulators and permitting authorities
- Inspection, integrity management and monitoring service providers
Typical uses include design and procurement specifications, risk assessments, operations manuals, integrity and inspection planning, and regulatory submissions.
Related standards
EN ISO 27913:2025 was prepared by ISO/TC 265 and adopted by CEN/TC 474. It complements other CCUS and CO2 quality and safety standards produced by ISO and regional bodies and should be used in conjunction with applicable national regulations and industry integrity/pressure‑equipment standards.
Keywords: EN ISO 27913:2025, ISO 27913:2024, CO2 pipeline transportation systems, carbon dioxide capture transportation and geological storage, CO2 transport, CCUS, pipeline design, flow assurance, corrosion management, leak detection.
