Achieving EN 1090 certification is essential for structural steel and aluminium manufacturers seeking to demonstrate compliance with European standards and gain access to regulated markets. However, many organizations underestimate the importance of audit preparation and discover critical compliance gaps only during certification assessments.In many cases, certification delays are not caused by poor fabrication quality but by missing documentation, inadequate traceability, incomplete welding records or weak Factory Production Control (FPC) systems.Understanding the most common audit findings can help manufacturers prepare effectively, reduce corrective actions and improve their chances of achieving certification on the first attempt.

This EN 1090 audit checklist highlights five common compliance mistakes that frequently delay certification and provides practical recommendations to avoid them.

Why EN 1090 Audit Preparation Matters

EN 1090 certification demonstrates that a manufacturer has established controlled processes for producing structural steel and aluminium components. During a certification audit, a notified body evaluates the effectiveness of your quality management system, Factory Production Control procedures, welding controls, material traceability, inspection records and compliance documentation.

Even organizations with strong manufacturing capabilities can face certification delays if documentation and quality records are incomplete.

A successful audit requires evidence of:

• Factory Production Control implementation
• Material traceability
• Qualified welding personnel
• Approved welding procedures
• Inspection and testing records
• Internal audits
• Corrective action processes
• Continuous compliance monitoring

EN 1090 Audit Readiness Scorecard

Mistake #1: Incomplete Factory Production Control Documentation

Factory Production Control (FPC) forms the foundation of EN 1090 compliance. It provides documented procedures that ensure products are manufactured consistently and meet applicable quality requirements.

Unfortunately, incomplete or outdated FPC documentation remains one of the most common causes of audit findings.

Common Problems

• Missing procedures
• Uncontrolled documents
• Outdated revisions
• Undefined responsibilities
• Lack of implementation records

Auditor Expectations

Auditors expect evidence that the FPC system is not only documented but actively implemented throughout the organization.

Required evidence often includes:

• Quality procedures
• Inspection plans
• Material control procedures
• Non-conformity management processes
• Corrective action systems

How to Avoid This Issue

Conduct regular document reviews and ensure all procedures are current, approved, and accessible to relevant personnel.

Mistake #2: Missing Welding Documentation

Mistake #2: Missing Welding Documentation

Welding quality is a critical component of EN 1090 compliance.

Auditors frequently identify missing or incomplete welding documentation during certification assessments.

Common Documentation Gaps

• Missing Welding Procedure Specifications (WPS)
• Missing Welding Procedure Qualification Records (WPQR)
• Expired welder qualifications
• Incomplete welding logs
• Lack of welding coordination records

Why This Matters

Welding defects can compromise structural integrity and create significant safety risks. EN 1090 therefore requires manufacturers to demonstrate strict control over welding activities.

Audit Checklist

Before your audit, verify that you have:

✓ Approved WPS documents

✓ Valid WPQR documentation

✓ Current welder qualification certificates

✓ Welding inspection records

✓ Welding coordinator responsibilities clearly defined

Mistake #3: Poor Material Traceability

Material traceability is a core requirement under EN 1090 and a frequent source of audit non-conformities.

Auditors must be able to trace materials from receipt through fabrication and final delivery.

Common Traceability Failures

• Missing mill certificates
• Lost material records
• Incorrect identification markings
• Unclear batch tracking
• Incomplete supplier documentation

Business Risks

Without traceability, manufacturers cannot demonstrate that structural components were fabricated using approved materials.

This may lead to:

• Major audit findings
• Certification delays
• Customer complaints
• Project rejection

Best Practices

Maintain documented records for:

• Material certificates
• Heat numbers
• Supplier information
• Fabrication records
• Inspection reports

Mistake #4: Incomplete Inspection and NDT Records

Many companies perform inspections but fail to maintain adequate records.

From an auditor’s perspective, undocumented inspections effectively did not occur.

Frequently Missing Records

• Visual inspection reports
• Ultrasonic Testing (UT) reports
• Magnetic Particle Testing (MT) reports
• Penetrant Testing (PT) reports
• Radiographic Testing (RT) reports
• Calibration certificates

Why NDT Documentation Matters

Non-Destructive Testing helps verify weld quality and structural integrity.

Incomplete NDT records may result in:

• Additional audit findings
• Corrective action requests
• Certification delays

Audit Preparation Tips

✓ Verify inspection records

✓ Review NDT reports

✓ Confirm equipment calibration

✓ Maintain acceptance criteria documentation

Mistake #5: Failure to Conduct Effective Internal Audits

Many manufacturers focus exclusively on certification audits while neglecting internal audits.

This approach often results in preventable non-conformities.

Common Internal Audit Weaknesses

• Audits not performed regularly
• Findings not documented
• Corrective actions not implemented
• No follow-up verification

Why Internal Audits Matter

Internal audits allow organizations to identify weaknesses before they are discovered by the notified body.

Benefits include:

• Reduced certification delays
• Improved compliance confidence
• Better document control
• Stronger quality systems

Organizations that perform regular internal audits are generally better prepared for certification assessments.

Most Common EN 1090 Audit Findings