DIN EN 15085-3 2023-02 PDF

Full title and description

DIN EN 15085-3:2023-02 — Railway applications — Welding of railway vehicles and components — Part 3: Design requirements. Specifies design-related requirements, weld performance classes and rules for the selection of materials, joint types, weld arrangement and required documentation to achieve the intended weld quality for the manufacture and maintenance of railway vehicles and their components.

Abstract

This part of the EN 15085 series defines design rules and classification principles for welded joints used in railway vehicles and components. It establishes weld performance classes (CP A, CP B1, CP B2, CP C1, CP C2, CP C3, CP D), links those classes to safety and stress categories, and sets minimum inspection, testing and imperfection quality levels (referencing EN ISO standards). The document is intended to ensure welds meet appropriate safety and serviceability requirements and to provide a common basis for design, production planning and conformity assessment.

General information

• Status: Published (01 February 2023) — superseded by a later edition published 01 July 2023.
• Publication date: 01 February 2023 (edition: 2023-02).
• Publisher: Deutsches Institut für Normung (DIN) on behalf of CEN.
• ICS / categories: 25.160.10 (Railway engineering), 45.060.01 (Welding).
• Edition / version: 2023-02 (replaced earlier national/European editions; note: a revised 2023-07 edition later replaced this release).
• Number of pages: 57 pages (2023-02 release).

Scope

Applies to welding of metallic materials in the manufacture and maintenance of railway vehicles and their parts. Specifies design and classification rules (but not detailed structural dimensioning) to ensure welds meet safety relevance and service requirements. It is intended for designers, welding coordinators and organizations assessing welding capability; it does not cover product qualification testing beyond the requirements necessary to demonstrate weld quality as part of production and maintenance.

Key topics and requirements

• Definition of safety categories (High, Medium, Low) and stress categories used to determine weld requirements.
• Weld performance classes: CP A, CP B1, CP B2, CP C1, CP C2, CP C3, CP D — criteria for assignment and implications for inspection.
• Correlation of weld performance class to weld inspection classes (CT 1–CT 4) and minimum proportions for volumetric and surface tests.
• Quality levels for weld imperfections referenced to EN ISO 5817 and EN ISO 10042 (acceptance criteria for fusion welded joints and arc brazed joints).
• Design guidance for joint geometry, fillet/plug/slot welds, butt welds on dissimilar thicknesses, fabricated box sections, and avoidance of overlapping HAZ.
• Selection rules for base materials and welding consumables; restrictions on weldability-sensitive items (e.g., fasteners).
• Requirements and formats for weld-related design documentation and marking (welding documentation on drawings, notes when volumetric NDT is not possible).
• Requirements for accessibility of welds for inspection and repair in maintenance and measures where accessibility cannot be provided (e.g., increased inspection class or design change).
• References to relevant inspection and personnel qualification documents in the EN 15085 series and related ISO welding standards (e.g., inspection, welder qualification and welding coordination links).

Typical use and users

Primary users are rolling stock designers, structural engineers, welding coordinators, quality managers, production planners and manufacturers of railway vehicles and components. Certification bodies, notified bodies and maintenance organisations use the standard to evaluate design-related welding requirements and to specify inspection and testing scopes for procurement, conformity assessment and maintenance contracts.

Related standards

Other parts of the EN 15085 series (Part 1: General; Part 2: Quality requirements and certification of welding manufacturers; Part 4: Production requirements; Part 5: Inspection, testing and documentation; Part 6: Maintenance), EN ISO 3834 (quality requirements for fusion welding), EN ISO 9606 (welder qualification), EN ISO 14732 (laser and electron beam welder/operator qualification), EN ISO 5817/10042 (weld imperfection acceptance), EN ISO 6520 (weld imperfection classification), EN ISO 13919 (visual acceptance levels) and other sector-relevant welding and fatigue standards.

Keywords

EN 15085, DIN EN 15085-3, railway welding, design requirements, weld performance class, CP A, CP B1, CP B2, CP C1, CP C2, CP C3, CP D, weld inspection class, welding documentation, welding coordinator, imperfection quality levels, EN ISO 5817, EN ISO 10042.

FAQ

Q: What is this standard?

A: DIN EN 15085-3:2023-02 is Part 3 of the EN 15085 series and specifies design requirements for welding of railway vehicles and components — covering weld performance classes, design rules for joints and documentation needed to achieve required weld quality.

Q: What does it cover?

A: It covers classification of welded joints by safety and stress, assignment of weld performance classes (CP A to CP D), minimum inspection/testing principles linked to those classes, acceptance levels for imperfections, and design guidance for joint geometry and material/consumable selection. It does not itself specify structural dimensioning rules.

Q: Who typically uses it?

A: Designers and structural engineers of rolling stock, welding coordinators, manufacturers and subcontractors performing welding on railway components, quality/inspection personnel, and certification bodies assessing conformance to railway welding requirements.

Q: Is it current or superseded?

A: The 2023-02 release was published on 01 February 2023. It was later superseded by a revised edition published in July 2023 (the 2023-07 edition). When working on a project, always verify you are using the latest published edition or the edition specified in your contract.

Q: Is it part of a series?

A: Yes — it is Part 3 of the EN 15085 series (Welding of railway vehicles and components). The series includes Parts 1–6 that together address general requirements, manufacturer certification, production, inspection and maintenance.

Q: What are the key keywords?

A: Weld performance class, CP A/CP B1/CP B2/CP C1/CP C2/CP C3/CP D, weld inspection class, safety category, stress category, welding documentation, imperfection quality levels, railway welding, EN 15085.