Overview
EN ISO 14723:2025 - Oil and gas industries including lower carbon energy - Pipeline transportation systems - Subsea pipeline valves (ISO 14723:2025) - defines requirements for subsea pipeline valves used in the petroleum and natural gas sectors. This European adoption of ISO 14723 (approved June 2025) supersedes the 2009 edition and supplements API 6DSS, 3rd edition (2017) (including Addenda 1 & 2 and Errata 1–3). It applies to ball, check, gate, plug and axial on–off valves in subsea pipeline systems and covers ASME Classes 150, 300, 600, 900, 1500 and 2500.
Key Topics and Requirements
- Scope and applicability: Focused exclusively on subsea pipeline valve applications for petroleum and natural gas; use outside this scope is not covered.
- Design and manufacturing: Sets requirements that manufacturers must follow for materials, construction and suitability for subsea service, in alignment with API 6DSS 3rd edition.
- Quality control and documentation: Requires documented quality control, traceability and records consistent with API 6DSS and ISO expectations.
- Assembly and testing: Mandates assembly procedures and functional/pressure testing requirements as per the referenced API specification, with ISO 14723 supplements where specified.
- Valve marking: Adds a mandatory marking requirement - ISO 14723 must appear on the nameplate; dual marking with “API 6DSS” is permitted. (Note: Annex A from the earlier edition is removed in its entirety.)
- Normative references and terminology: Uses API 6DSS and related ISO definitions (terms from API 6DSS and ISO 14313).
Practical Applications and Users
EN ISO 14723:2025 is essential for professionals involved with subsea pipeline systems and valve lifecycle management:
- Valve manufacturers - for design, production, testing and compliance of subsea valves.
- EPC contractors and subsea integrators - to specify compliant valves in procurement and installation packages.
- Pipeline operators and asset owners - to ensure valves meet recognized standards for safety, reliability and maintainability.
- Quality and inspection teams - for acceptance criteria, documentation and traceability.
- Regulatory bodies and certifying agencies - as the harmonized standard for conformity assessment in CEN member states.
This standard supports safe, reliable subsea pipeline transport of oil, gas and lower‑carbon energy carriers.
Related Standards
- API 6DSS, 3rd edition (2017) (including Addenda 1 & 2 and Errata 1–3) - primary normative reference supplemented by ISO 14723:2025.
- ISO 14313 - foundational pipeline valve terminology and background.
- ASME pressure class designations - ASME Class 150–2500 (valve rating references).
Keywords: subsea pipeline valves, EN ISO 14723:2025, API 6DSS, ASME Class, ball valve, gate valve, check valve, plug valve, axial on–off valve, pipeline transportation systems, valve testing, valve marking, quality control.
