ASME Section IX vs EN ISO 15614-1 vs API 1104 vs AWS D1.1 Clause 4 vs NB/T 47014 WPS + PQR Standards Comparison Matrix: Welding Procedure + Welder Qualification Framework Selection Guide for Pressure Equipment, Structural, Pipeline, and International Fabricators
This WPS/PQR standards comparison matrix maps the five major welding procedure specification + procedure qualification record + welder qualification standards used globally — ASME Section IX (US ASME BPVC WPS + PQR + welder qualification) + EN ISO 15614-1 (European welding procedure test for arc + gas welding of steels) + API 1104 (US pipeline welding + Section 5 procedure qualification + Section 6 welder qualification) + AWS D1.1 Clause 4 (US structural steel welding qualification) + NB/T 47014 (Chinese pressure equipment WPS/PQR + Chinese national standard). Fabricator + WPS author + welding engineer + qualification decision makers use this matrix to select the appropriate WPS/PQR framework aligned with target market code compliance.
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.
5 WPS/PQR Standards Head-to-Head Overview
| Standard | Full Title | Primary Scope |
|---|---|---|
| ASME Section IX | Welding, Brazing, and Fusing Qualifications | US ASME BPVC pressure equipment + widely adopted internationally |
| EN ISO 15614-1 | Specification and Qualification of Welding Procedures for Metallic Materials — Welding Procedure Test — Part 1: Arc and Gas Welding of Steels | European + international ISO-adoption countries |
| EN ISO 9606-1 | Qualification testing of welders — Fusion welding — Part 1: Steels | Companion welder qualification for EN ISO 15614-1 |
| API 1104 | Welding of Pipelines and Related Facilities | US pipeline welding (per Batch 41 #4 field welding standards) |
| AWS D1.1 Clause 4 | Structural Welding Code — Steel — Qualification chapter | US structural steel (per Batch 42 #4 AWS D1 family) |
| NB/T 47014 | Chinese pressure equipment welding procedure qualification | Chinese GB/T 150 + TSG 21 framework (per Batch 36 #3 + #6) |
Essential Variables + Test Coupon Comparison
| Standard | Essential Variables Concept | Test Coupon Typical Size |
|---|---|---|
| ASME Section IX | Essential (mandatory requalification if changed) + Supplementary Essential (impact) + Non-Essential (documentation only) | PQR coupon typically 300 mm × 300 mm |
| EN ISO 15614-1 | Essential variables per material group + range validation | Similar 300 mm typical |
| API 1104 | Essential variables for pipeline-specific positions + material + technique | Pipe sample per Section 5 |
| AWS D1.1 Clause 4 | Prequalified WPS Clause 3 + qualification by test | Structural coupon per welder-material match |
| NB/T 47014 | Chinese essential variable classification | Similar to ASME + specific supplementary |
Mechanical + NDE Test Requirements
- ASME Section IX: Tensile + guided bend + Charpy impact per Div 1/2/3 requirement + macro etch + hardness for specific material
- EN ISO 15614-1: Tensile + bend + Charpy impact per material group + macro etch + hardness + VT/RT/UT NDE
- API 1104: Tensile + bend + nick-break + macro etch for pipeline procedure
- AWS D1.1 Clause 4: Tensile + bend + macro etch per structural qualification
- NB/T 47014: Tensile + bend + Charpy impact + specialty per Chinese pressure vessel requirement
Welder Qualification Position System
- ASME IX QW-461: 1G (flat) + 2G (horizontal) + 3G (vertical) + 4G (overhead) groove; 1F/2F/3F/4F fillet; 5G/6G pipe positions
- EN ISO 9606-1: PA/PB/PC/PD/PE/PF/PG welding positions
- API 1104: 1G/2G/5G/6G pipeline positions
- Cross-recognition: ASME 6G approximately equivalent to EN PH; complex mapping between systems
Certification Cost + Timeline Comparison
- ASME IX WPS/PQR qualification: 5,000-15,000 USD per WPS + AI witness fees + typical 2-6 weeks per WPS
- EN ISO 15614-1 qualification: Similar cost range + Notified Body (per Batch 41 #3) witness
- API 1104 pipeline procedure: 3,000-10,000 USD per procedure typical
- AWS D1.1 Clause 4 structural: Prequalified WPS avoids qualification cost; qualified WPS 3,000-8,000 USD
- NB/T 47014 Chinese: Cost varies + Chinese Special Equipment Inspector (per Batch 36 #6) witness
- Welder qualification: 500-2,000 USD per welder per position/process typical globally
Cross-Recognition + Dual Qualification
- ASME IX + EN ISO 15614-1: Similar essential variable philosophy; sometimes dual-qualified for global fabricator; not automatic reciprocity
- ASME IX + API 1104: Different focus but sometimes cross-qualified for versatile welder
- ASME IX + NB/T 47014: Chinese specialty; different regulatory acceptance
- Owner-specific supplements: Oil majors + IOCs often add owner-specific WPS review beyond standard framework
Application Selection Framework
- ASME BPVC pressure equipment (per Batch 38 #4): ASME IX primary; EN ISO 15614-1 for European market
- European pressure equipment (PED): EN ISO 15614-1 primary; ASME IX accepted with PED review
- Oil pipeline (API + ASME B31 series per Batch 36 #4): API 1104 primary; ASME IX for shop-welded piping
- Structural steel building/bridge/wind tower: AWS D1.1 Clause 4 or EN 1090 (per Batch 42 #3) qualification
- Chinese domestic pressure equipment: NB/T 47014 primary; international dual for export
- Global exporter multiple markets: ASME IX + EN ISO 15614-1 dual qualification common
Wuxi ABK Equipment Support for WPS/PQR
- Comprehensive parameter logging: Cell A/B/C/D + Digital Twin (per Batch 24 #1) captures all essential + supplementary essential + non-essential variables real-time
- PQR coupon fabrication: Wuxi ABK equipment produces PQR test coupons with documented parameters
- Welder qualification test support: Same equipment used for welder qualification test coupon production
- Multi-code documentation: Same equipment + parameter set adapts to ASME + EN ISO + API + NB/T documentation requirements
Summary
ASME Section IX vs EN ISO 15614-1 vs API 1104 vs AWS D1.1 Clause 4 vs NB/T 47014 WPS + PQR + welder qualification standards comparison matrix — ASME IX (US BPVC widely adopted internationally + Essential/Supplementary/Non-Essential variables + QW-461 position system) + EN ISO 15614-1 (European + international ISO adoption + material group essential + PA-PG welding positions) + EN ISO 9606-1 (companion welder qualification) + API 1104 (US pipeline per Batch 41 #4 field welding + 1G/2G/5G/6G pipeline positions) + AWS D1.1 Clause 4 (US structural per Batch 42 #4 D1 family) + NB/T 47014 (Chinese pressure equipment per Batch 36 #3/#6). Mechanical + NDE test (tensile + bend + Charpy impact + macro etch + hardness + NDE per standard). Certification cost (WPS 3-15k USD + welder 500-2k per position; AI/Notified Body witness). Cross-recognition (not automatic reciprocity + owner-specific supplements). Application selection (ASME BPVC → IX + EN ISO for Europe; PED → EN ISO + IX accepted; pipeline → API 1104 + ASME IX shop; structural → AWS D1.1/EN 1090; Chinese → NB/T 47014 + international dual). Wuxi ABK Machinery equipment Cell A/B/C/D + Digital Twin (per Batch 24 #1) + comprehensive parameter logging + PQR coupon fabrication support + multi-code documentation supports ASME IX + EN ISO 15614-1 + API 1104 + AWS D1.1 + NB/T 47014 WPS/PQR + welder qualification across global fabricator markets.
Contact: jan@weldc.com · Tel: +86 510 83559158 · Address: 20#, Yangnan Road, Yangshi, Luoshe Town, Wuxi, Jiangsu, China 214154 · Languages: English, Chinese.
Last updated: 2026-08-01.