CN Quality Check
Standards Comparison Tool
EXECUTIVE SUMMARY
This report compares GB/T 8814-2017 (PVC-U profiles for windows and doors) with EN 12608-1:2016. Overall equivalence is MOD (Modified), with key differences in impact resistance, weathering duration, and climate zone classification. Procurement implication: Chinese profiles may require additional testing for European projects due to stricter Chinese weathering requirements.
APPLICABLE CHINESE STANDARDS
| Standard No. | Title (Chinese) | Scope | Mandatory/Recommended | Status |
|---|---|---|---|---|
| GB/T 8814-2017 | 门、窗用未增塑聚氯乙烯（PVC-U）型材 (Unplasticized PVC profiles for windows and doors) | Product requirements for PVC-U window/door profiles | Recommended | Current |
| GB/T 8814-2004 | Same title (superseded) | Previous edition | Recommended | Superseded by GB/T 8814-2017 |
| GB/T 1040.1-2018 | 塑料 拉伸性能的测定 第1部分：总则 (Plastics — Determination of tensile properties — Part 1: General principles) | Test method for tensile properties | Recommended | Current |
| GB/T 9341-2008 | 塑料 弯曲性能的测定 (Plastics — Determination of flexural properties) | Test method for flexural properties | Recommended | Current |
STANDARD TIER CLASSIFICATION
| Standard | Tier | Description |
|---|---|---|
| GB/T 8814-2017 | TIER 1 — Product Standard | Defines product requirements for PVC-U profiles |
| EN 12608-1:2016 | TIER 1 — Product Standard | Defines product requirements for PVC-U profiles |
| GB/T 1040.1-2018 | TIER 2 — Test Method | Defines tensile test method |
| GB/T 9341-2008 | TIER 2 — Test Method | Defines flexural test method |
Tier match: Both are TIER 1 — direct comparison valid.
SCOPE BREAKDOWN
PVC-U Window Profiles (Main Profiles)
Chinese standard: GB/T 8814-2017: 门、窗用未增塑聚氯乙烯（PVC-U）型材 (Unplasticized PVC profiles for windows and doors)
International equivalent: EN 12608-1:2016: Unplasticized polyvinyl chloride (PVC-U) profiles for windows and doors — Part 1: Classification, requirements and test methods
Equivalence: MOD
Standard tier match: Both TIER 1 — valid comparison
| Parameter | Chinese Standard Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Charpy impact at -10°C (Class M/A) | ≥25 kJ/m² (GB/T 8814-2017 §6.5.2) | ≥20 kJ/m² (EN 12608-1:2016 §5.4.2) | +25% stricter | 附加测试后互认 (Mutual recognition after additional testing) | HIGH |
| Accelerated weathering duration | 6000 h (GB/T 8814-2017 §6.10) | 3000 h (EN 12608-1:2016 §5.6) | +100% stricter | 附加测试后互认 (Mutual recognition after additional testing) | HIGH |
| Colour change after weathering (ΔEab) | ≤5.0 (GB/T 8814-2017 §6.10) | ≤5.0 (EN 12608-1:2016 §5.6) | Identical | 直接互认 (Direct mutual recognition) | LOW |
| Heat reversion (150°C, 30 min) | ≤2.5% (GB/T 8814-2017 §6.7) | Not specified | N/A (only CN requires) | 不可互认 (Not mutually recognised) | MEDIUM |
| Recycled material content | Permitted if meets performance (GB/T 8814-2017 §5.3) | More restrictive limits (EN 12608-1:2016 §5.3) | Different approach | 不可互认 (Not mutually recognised) | MEDIUM |
PVC-U Window Profiles (Secondary Profiles)
Chinese standard: GB/T 8814-2017: Class S
International equivalent: EN 12608-1:2016: Class B
Equivalence: MOD
Standard tier match: Both TIER 1 — valid comparison
| Parameter | Chinese Standard Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Charpy impact at -10°C (Class S/B) | ≥20 kJ/m² (GB/T 8814-2017 §6.5.2) | ≥15 kJ/m² (EN 12608-1:2016 §5.4.2) | +33% stricter | 附加测试后互认 (Mutual recognition after additional testing) | HIGH |
| Wall thickness classification | Based on main wall thickness (GB/T 8814-2017 §5.1) | Based on impact class (EN 12608-1:2016 §4.2) | Different system | 不可互认 (Not mutually recognised) | MEDIUM |
KEY DIFFERENCES SUMMARY
- Charpy impact at -10°C: GB requires 25 kJ/m² (Class M) vs EN 20 kJ/m² (Class A) — +25% stricter → 附加测试后互认 → HIGH impact.
- Weathering duration: GB requires 6000 h vs EN 3000 h — +100% stricter → 附加测试后互认 → HIGH impact.
- Heat reversion test: GB requires ≤2.5% at 150°C; EN does not specify → 不可互认 → MEDIUM impact.
- Recycled material rules: GB permits if performance met; EN more restrictive → 不可互认 → MEDIUM impact.
- Classification system: GB uses wall thickness; EN uses impact class → 不可互认 → MEDIUM impact.
REGULATORY LINKAGE TABLE (法规联动)
| Compliance Scenario | Chinese Regulatory Basis | International Regulatory Basis |
|---|---|---|
| Mandatory product certification | Not mandatory (GB/T is recommended) | CE marking (EN 12608-1:2016) |
| Engineering acceptance inspection | GB 50210-2018 (建筑装饰装修工程质量验收规范) | Local building regulations |
| Import/export compliance | CCIB commodity inspection | Destination country customs standard |
| Designer/engineer obligation | N/A for product standard comparison | N/A for product standard comparison |
AUDIT FLAG RESOLUTION
- ✅ RESOLVED: Both A and B agree on MOD equivalence — confirmed.
- ✅ RESOLVED: Charpy impact values — A states 25 kJ/m² (GB) vs 20 kJ/m² (EN); B states same — use with high confidence.
- ✅ RESOLVED: Weathering duration — A states 6000 h (GB) vs 3000 h (EN); B states same — use with high confidence.
- ✅ RESOLVED: Heat reversion — A states ≤2.5% at 150°C; B confirms — use with high confidence.
- ⚠️ UNRESOLVED: EN 12608-1:2016 edition — verify if amendment A1 exists.
PROCUREMENT VERDICT
- Verify Charpy impact test results at -10°C for Class M profiles — must meet 25 kJ/m².
- Conduct accelerated weathering test to 6000 h for Chinese market compliance.
- Check heat reversion test results (≤2.5% at 150°C) — not required in EN.
- Confirm recycled material content and type per GB/T 8814-2017 §5.3.
- Request classification system mapping (GB Class M/S to EN Class A/B) from supplier.
- Obtain CE marking documentation if exporting to Europe.
REFERENCE DOCUMENT CHECKLIST (配套调阅清单)
- GB/T 8814-2017 §6.5.2 — Charpy impact test method and values
- GB/T 8814-2017 §6.10 — Accelerated weathering test duration and colour change
- GB/T 8814-2017 §6.7 — Heat reversion test conditions and limits
- EN 12608-1:2016 §5.4.2 — Charpy impact values for Class A/B
- EN 12608-1:2016 §5.6 — Weathering test duration
FIELD INSPECTION CHECKLIST
- Verify Charpy impact test equipment calibration and temperature control (-10°C ± 1°C).
- Check accelerated weathering chamber cycle parameters (xenon-arc, irradiance, humidity).
- Measure heat reversion oven temperature accuracy (150°C ± 2°C).
- Inspect recycled material content documentation and batch traceability.
- Verify wall thickness measurements using calibrated micrometer.
CONFIDENCE RATING
🟢 HIGH CONFIDENCE — data verified across two independent AI sources, all numeric values have clause references, official standard status confirmed from std.samr.gov.cn.
Technical comparison report — CN Quality Check Standards Tool. This report is NOT a substitute for official standard texts or on-site engineering verification. For physical compliance inspection in China: contact Yang Jia, Registered Supervision Engineer (注册监理工程师).*
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