Overview
EN ISO 9692-2:2024 - Welding and allied processes - Joint preparation - Part 2: Submerged arc welding of steels specifies recommended types of joint preparation for submerged arc welding (SAW) using a single wire electrode (process 121, ISO 4063) on steels. The document is the 2024 edition adopted by CEN (EN ISO 9692-2:2024) and applies primarily to fully penetrated welds in welding positions PA and PB (ISO 6947). It provides standardized joint geometries, reference numbers and dimensional guidance presented in Table 1 and Table 2 for butt welds welded from one or both sides.
Key topics and technical requirements
- Scope and applicability
- Applies to SAW of weldable steels with one wire electrode (process 121).
- Covers only PA and PB welding positions; use of position PC requires special preparation.
- Intended for fully penetrated welds; partly penetrated joints can deviate if specified by the application standard or agreed by parties.
- Joint types and dimensions
- Recommends joint types (square butt, single‑V, single‑U, single‑bevel, single‑J, double‑V, etc.) and dimensional ranges in Table 1 (one‑sided welds) and Table 2 (both‑sided welds).
- Reference numbering aligns with ISO 2553 conventions.
- Root and backing guidance
- Root gaps are specified after tack welding, if tacks are used.
- The standard does not specify backing material types or dimensions; root runs may serve as backing. Any backing or root run must be included in the welding procedure specification (WPS).
- Process and quality interactions
- Notes that use of root runs, backing and slag removal (grinding before subsequent runs) can affect weld quality and should be addressed in accordance with relevant quality requirements (e.g., ISO 3834) and welding procedure specification requirements (ISO 15609-1).
Practical applications
- Use this standard when specifying joint preparation for SAW on steel structures, pressure parts, heavy fabrication, pipe and plate work where a single‑wire SAW process is used.
- Useful for:
- Preparing welding procedure specifications (WPS) and shop drawings.
- Selecting joint geometries to optimise penetration, deposition rates and productivity for SAW.
- Communicating dimensional tolerances between designers, welders and inspectors.
- Helps ensure consistency across manufacturing, inspection and contractual documentation for SAW applications.
Who should use this standard
- Welding engineers and fabricators
- Procedure writers and QA/QC inspectors
- Design engineers specifying welded joints
- Standards and compliance officers in steel fabrication and heavy industry
Related standards
Keywords: EN ISO 9692-2:2024, submerged arc welding, joint preparation, welding of steels, process 121, PA PB welding positions, fully penetrated welds, welding procedure specification.
