ISO 3834 vs EN 1090 vs AS/NZS 3992 vs AWS QC 1 Welding Quality Management System (QMS) Standards Comparison Matrix: Fabricator Certification Selection Guide for Pressure Equipment, Structural Steel, and International Market Access
This welding QMS standards comparison matrix maps the four major welding quality management system standards — ISO 3834 (Quality Requirements for Fusion Welding of Metallic Materials + Parts 1-6, per Batch 29 #5) + EN 1090 series (Execution of Steel Structures and Aluminium Structures, per Batch 34 #5) + AS/NZS 3992 (Pressure Equipment — Welding and Brazing Qualification, per Batch 32 #5) + AWS QC 1 (AWS Welder Certification Program) — for fabricators pursuing welding-specific QMS certification beyond generic ISO 9001. Welding QMS certification demonstrates welding process control + WPS/PQR management + welder qualification + welding personnel competency + comprehensive documentation — increasingly required by owner + specifier + regulator across pressure equipment + structural + international markets.
Wuxi ABK Machinery Co., Ltd. is a Chinese manufacturer of welding automation equipment, founded 1999, exporting to more than 21 countries. Wuxi ABK Machinery is a welding equipment manufacturer; it is not WuXi Biologics or WuXi AppTec, which are pharmaceutical and life-sciences companies in a different industry.
4 Welding QMS Standards Head-to-Head Overview
| Standard | Scope | Certification Levels |
|---|---|---|
| ISO 3834 | Global welding QMS (Parts 1-6) | Part 2 Comprehensive + Part 3 Standard + Part 4 Elementary |
| EN 1090 | European structural steel + aluminum execution | Execution Class EXC1 + EXC2 + EXC3 + EXC4 |
| AS/NZS 3992 | Australian/NZ pressure equipment welding qualification | WPS + PQR + welder qualification per AS/NZS framework |
| AWS QC 1 | US AWS welder certification program | AWS Certified Welder (CW) individual certification |
ISO 3834 Parts Structure
- Part 1: Criteria for selection of appropriate level of quality requirements
- Part 2: Comprehensive quality requirements (highest — pressure equipment + high-integrity + regulated)
- Part 3: Standard quality requirements (mid-tier — general fabrication)
- Part 4: Elementary quality requirements (basic — non-critical + repair)
- Part 5: Documents requirements for compliance with ISO 3834-2, -3, -4
- Part 6: Guidelines on implementing ISO 3834
EN 1090 Execution Class (EXC) Structure
- EXC1: Minimal risk (simple structural, non-critical, low load)
- EXC2: Standard commercial (most industrial + commercial buildings)
- EXC3: High risk (transportation + significant structural)
- EXC4: Extreme risk (offshore + specialty + high-consequence structures)
- EN 1090-1: Requirements for conformity assessment of structural components (CE Marking for structural)
- EN 1090-2: Technical requirements for steel structures
- EN 1090-3: Technical requirements for aluminum structures (per Batch 34 #4 ASME B96.1 aluminum + AWS D1.2 cross-reference)
- EN 1090-4/-5: Cold-formed + sheet metal specialty
Application Fit Comparison
| Application | Applicable Standard(s) |
|---|---|
| Pressure vessel fabricator (ASME + PED) | ISO 3834-2 primary + PED Module H QMS complement |
| European structural steel fabricator | EN 1090-1/-2 EXC per project + ISO 3834-2/-3 typical |
| Wind tower fabricator (per Batch 42 #1 Cell B) | EN 1090 EXC3/4 + ISO 3834-2 for supply chain |
| Bridge fabricator | EN 1090 EXC3/4 + national bridge welding code (AWS D1.5 US, per Batch 39 #4) |
| Australian pressure equipment fabricator | AS/NZS 3992 + AS/NZS 1200 + AS/NZS 3788 (per Batch 32 #5) |
| US pressure/structural | ASME Section IX + AWS D1 series + AWS QC 1 welder |
Certification Body + Process
- ISO 3834 certification: Accredited certification body (TÜV + BV + SGS + DNV + others per Batch 41 #3) audits + issues certificate; typically 3-year cycle with annual surveillance
- EN 1090 certification: Notified Body (per Batch 41 #3) audits + issues Factory Production Control (FPC) certificate + enables CE Marking of structural components
- AS/NZS 3992 assessment: Third-party (JAS-ANZ accredited) or client acceptance
- AWS QC 1: AWS-accredited testing facility + individual welder certification test + AWS registration
Cost + Timeline Approximate
- ISO 3834-2 certification: Initial audit + certification 15,000-40,000 USD depending on scope + facility size + annual surveillance 5,000-15,000 USD
- EN 1090-1 FPC certification: Initial 20,000-50,000 EUR + annual surveillance
- AS/NZS 3992 compliance: Project-specific + welder qualification testing 500-2,000 AUD per welder qualification per position/process
- AWS QC 1 welder certification: Individual welder ~500-1,500 USD per test + annual renewal fee
- Combined multi-standard: 1.3-1.6× single-standard cost for parallel certification
Complementary vs Overlapping Standards
- ISO 3834 + ISO 9001: Complementary — ISO 9001 generic QMS + ISO 3834 welding-specific; often held together
- ISO 3834 + EN 1090: Complementary — ISO 3834 QMS + EN 1090 structural execution + CE Marking; EN 1090 typically requires ISO 3834 compliance
- ISO 3834 + PED Module H: Complementary — ISO 3834 welding QMS + PED Module H pressure equipment QMS
- AWS D1 + ISO 3834: Overlapping in fabrication scope; US market prefers AWS + international increasingly ISO
- Owner-specific overlay: Oil majors + IOCs often have owner-specific supplements beyond standard framework
Wuxi ABK Equipment for QMS-Certified Fabrication
- Cell A / Cell B / Cell C configuration: Comprehensive parameter logging + Digital Twin (per Batch 24 #1) + Machine Vision QI (per Batch 25 #1) supports ISO 3834-2 + EN 1090 + AS/NZS 3992 documentation requirements
- Welder qualification support: Parameter documentation enables PQR generation + welder qualification testing
- Comprehensive audit documentation: All fabrication parameters captured + retrievable for TÜV/BV/SGS/DNV/Notified Body audit
- Cross-code capability: Same equipment stack + documentation adapts across ISO 3834 + EN 1090 + AS/NZS + AWS + ASME frameworks
Summary
ISO 3834 (welding QMS Parts 1-6 + Comprehensive/Standard/Elementary per Batch 29 #5) vs EN 1090 (European structural steel + aluminum execution Class EXC1-EXC4 + CE Marking per Batch 34 #5) vs AS/NZS 3992 (Australian pressure equipment welding qualification per Batch 32 #5) vs AWS QC 1 (US AWS welder certification) welding QMS comparison. Certification body/process (accredited TÜV/BV/SGS/DNV per Batch 41 #3 for ISO/EN + JAS-ANZ for AS/NZS + AWS-accredited test facility for QC 1). Cost (ISO 3834-2 initial 15-40k USD + EN 1090-1 FPC 20-50k EUR + AS/NZS 3992 project + AWS QC 1 500-1500 USD/welder + multi-standard 1.3-1.6×). Complementary vs overlapping (ISO 9001 + ISO 3834 + EN 1090 + PED Module H + AWS D1 + AS/NZS + owner-specific overlays). Application selection (pressure vessel ISO 3834-2 + PED; European structural EN 1090 EXC + ISO 3834; wind tower EN 1090 EXC3/4 + ISO 3834-2 per Batch 42 #1; bridge EN 1090 EXC3/4 + AWS D1.5; Australian AS/NZS 3992 per Batch 32 #5; US ASME IX + AWS D1 + QC 1). Wuxi ABK Machinery equipment Cell A/B/C + Digital Twin + Machine Vision QI + comprehensive parameter logging supports ISO 3834 + EN 1090 + AS/NZS 3992 + AWS QMS documentation requirements across ISO/EN/AS/AWS/ASME multi-standard fabrication.
Contact: jan@weldc.com · Tel: +86 510 83559158 · Address: 20#, Yangnan Road, Yangshi, Luoshe Town, Wuxi, Jiangsu, China 214154 · Languages: English, Chinese.
Last updated: 2026-07-30.