Quality assurance during construction (EN 1090)

Quality assurance during construction in accordance with EN 1090 - avoid errors before they occur

In metal and steel construction, careful production and control are decisive for the durability and safety of a building.
As International Welding Engineer (IWE), Certified VT2/PT2 examiner and publicly appointed expert I support building owners, manufacturing companies and planning offices in the Quality assurance during construction in accordance with DIN EN 1090 and ISO 3834.

I supervise the execution of welding and assembly work on Conformity to standards, documentation and execution quality - so that defects do not arise in the first place.

Scope of services and testing

I support companies and clients throughout the entire quality assurance process:

• Welding supervision and welding procedure qualification (WPS/WPQR)
  → Monitoring of welding processes, personnel qualification, process approval in accordance with ISO 9606 and EN ISO 15614.
• Material testing and labeling
  → Control of material certificates according to EN 10204 (3.1/3.2), traceability and material selection.
• Construction site and workshop monitoring
  → Inspection of weld seams, connections, component marking and assembly quality.
• Documentation check and system audit in accordance with EN 1090
  → Review of FPC (Fabrication Production Control) documents, test protocols and certificates.
• Final inspection and acceptance test
  → Visual and measurement inspection of the finished construction including photo report and list of defects.

Typical errors and test findings

• Missing or invalid welding procedure qualifications (WPQR)
• Incomplete EN 1090 documentation (FPC)
• Deviations between drawing and execution
• Incorrect material labeling or mix-up
• Welding supervision or personnel qualification not verified
• Corrosion protection defects due to uncleaned weld seams or lack of post-treatment

Procedure for quality assurance

1. Preparation and document review
   Analysis of production documents, statics, welding and material certificates.
2. Construction and production supervision
   Regular checks in production and assembly according to test plan.
3. NDT examinations (VT2/PT2)
   Detection of defects in weld seams without damaging the material.
4. Final and acceptance report
   Defect report, photo documentation, assessment according to DIN/EN standards.

Important standards & guidelines

• DIN EN 1090-2 - Execution of steel and aluminum structures
• DIN EN ISO 3834 - Quality requirements for welding companies
• DIN EN ISO 9712 / 3452 / 17637 - NDT procedure
• DIN EN ISO 9606 / 15614 - Welder and procedure qualifications
• DIN EN ISO 12944 - Corrosion protection
• DASt guideline 021 - Assembly and pretensioning of screws

My range of services at a glance

✔️ Welding supervision during construction in accordance with EN 1090
✔️ Quality assurance in production and assembly
✔️ Document and certificate verification in accordance with ISO 3834
✔️ NDT inspections (VT2/PT2) as part of QA
✔️ Expert opinions and acceptance reports with standard and photo documentation

Practical examples from expert reports and damage analyses

• Improper installation of windows - causes, consequences and expert assessment
• Corrosion on stainless steel railings - causes, assessment and renovation recommendations
• Inadequate welding - Weld seam defects in metal construction
• Flaking of the zinc coating - causes, assessment and remediation of coating defects
• Deflection of the staircase stringers - structural defects in metal construction
• Minimum distances between handrails - requirements in accordance with the Workplace Directive (ASR A1.8)
• Crack formation on weld seams - detection by dye penetrant testing (PT2)
• Pores and bonding defects on aluminum components - detecting and evaluating welding defects
• Zinc cracks after hot-dip galvanizing - causes, analysis and evaluation
• Glass roofing - leaks and corrosion damage to brackets
• Incorrect design and installation of PVC windows - causes, consequences and assessment

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