Overview
CEN/TR 13445-9:2011 - "Unfired pressure vessels - Part 9: Conformance of the EN 13445 series to ISO 16528" is a CEN Technical Report that documents how the EN 13445 family of standards for unfired pressure vessels aligns with ISO 16528‑1 (Performance requirements for boilers and pressure vessels). The report focuses on vessels of steel construction (with future editions expected to cover spheroidal graphite cast iron and aluminium). It updates the earlier 2007 report to reflect the 2009 edition of EN 13445 and expands treatment of creep-related failure modes.
Key topics and technical requirements
CEN/TR 13445-9:2011 provides structured conformance information, including:
- Failure mode summary - mapping of ISO 16528‑1 failure modes (brittle fracture, ductile rupture, leakage at joints, instability, creep rupture, fatigue, etc.) to where and how EN 13445 addresses them.
- Detailed failure mode checklists - clause-by-clause references to EN 13445 Parts and Annexes showing explicit and implicit design provisions, fabrication controls, material requirements, examination/NDT and testing requirements.
- Technical requirement checklists - identification of normative provisions needed to meet ISO 16528‑1 performance expectations.
- References to EN 13445 parts:
- Part 2 (Materials) - impact/ductility and reference thickness rules, Annex B brittle fracture methods
- Part 3 (Design) - stress limits, creep design, flanges, shells under external pressure, analysis routes
- Part 4 (Fabrication) - manufacturing tolerances, weld production testing
- Part 5 (Inspection & Testing) - NDT, proof/hydrostatic testing, acceptance criteria
- NDT and acceptance criteria mapped to EN ISO 5817 levels (visual and nondestructive testing requirements).
- Special coverage of creep design and full details for creep rupture, excessive deformation at joints, and creep instability.
Practical applications and users
This Technical Report is a practical conformity guide for:
- Design engineers verifying that EN 13445-based designs meet ISO 16528‑1 performance expectations.
- Fabricators and welding supervisors implementing EN 13445 fabrication, testing and tolerancing rules.
- Inspection & testing teams planning NDT, proof tests and acceptance criteria per EN 13445/EN ISO 5817.
- Certification bodies, regulators and asset owners performing standards alignment, risk assessment and compliance documentation.
- Operators of steel pressure vessels seeking documented evidence of equivalence between EN and ISO performance requirements.
Related standards
- EN 13445 series (Parts 1–5, CR 13445‑7)
- ISO 16528‑1 (Boilers and pressure vessels - Performance requirements)
- EN ISO 5817 (Welding - Acceptance levels for imperfections)
CEN/TR 13445-9:2011 is a reference tool for linking EN 13445 technical provisions to ISO performance criteria - useful for conformity assessment, technical audits, and informed application of standards in pressure-vessel engineering.
