CN Quality Check
Standards Comparison Tool
EXECUTIVE SUMMARY
This report compares GB/T 32223-2025 (建筑门窗五金件 通用要求 — Building hardware for windows and doors: General requirements) with BS 13126 (multi-part) for self-latching window hardware. Both are TIER 1 product standards with NEQ equivalence. Key procurement implication: static load and corrosion test methods differ significantly, requiring additional testing for UK market compliance.
APPLICABLE CHINESE STANDARDS
| Standard No. | Title (Chinese) | Scope | Mandatory/Recommended | Status |
|---|---|---|---|---|
| GB/T 32223-2025 | 建筑门窗五金件 通用要求 (Building hardware for windows and doors: General requirements) | Defines general requirements for window hardware including self-latching mechanisms | Recommended (GB/T) | Current |
| GB/T 32223-2015 | 建筑门窗五金件 通用要求 (Building hardware for windows and doors: General requirements) | Superseded edition | Recommended (GB/T) | Superseded by 2025 edition |
| GB 50009-2012 | 建筑结构荷载规范 (Load code for building structures) | Wind load design for windows | Mandatory (GB) | Current |
STANDARD TIER CLASSIFICATION
| Standard | Tier | Description |
|---|---|---|
| GB/T 32223-2025 | TIER 1 — Product Standard | Defines product requirements for window hardware |
| BS 13126 (multi-part) | TIER 1 — Product Standard | Defines product requirements for window hardware |
| GB 50009-2012 | TIER 3 — Design Code | Governs structural load calculations |
SCOPE BREAKDOWN
Self-latching window hardware
Chinese standard: GB/T 32223-2025: 建筑门窗五金件 通用要求 (Building hardware for windows and doors: General requirements)
International equivalent: BS 13126-1:2018: Building hardware — Window and door hardware — Requirements and test methods for self-locking and self-latching devices
Equivalence: NEQ
Standard tier match: Both TIER 1 — valid comparison
Parameter comparison table:
| Parameter | Chinese Standard Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| Cyclic durability (self-latching) | ≥100,000 cycles (GB/T 32223-2025 §5.3.2) | ≥100,000 cycles (BS 13126-1:2018 §6.3.2) | Identical | 直接互认 (Direct mutual recognition) | LOW |
| Static load – latch bolt (engaged) | ≥800 N (GB/T 32223-2025 §5.4.1) | ≥1,000 N (BS 13126-1:2018 §6.4.1) | -20% (CN lower) | 附加测试后互认 (Mutual recognition after additional testing) | HIGH |
| Corrosion resistance (neutral salt spray) | ≥96 h (GB/T 32223-2025 §5.6.1) | ≥240 h (BS 13126-1:2018 §6.6.1) | -60% (CN lower) | 不可互认 (Not mutually recognised) | HIGH |
| Operating force (self-latching) | ≤50 N (GB/T 32223-2025 §5.2.1) | ≤60 N (BS 13126-1:2018 §6.2.1) | -17% (CN stricter) | 直接互认 (Direct mutual recognition) | LOW |
KEY DIFFERENCES SUMMARY
- Static load – latch bolt: CN ≥800 N vs UK ≥1,000 N (−20%). 附加测试后互认 (Mutual recognition after additional testing). HIGH impact.
- Corrosion resistance: CN ≥96 h salt spray vs UK ≥240 h (−60%). 不可互认 (Not mutually recognised). HIGH impact.
- Operating force: CN ≤50 N vs UK ≤60 N (−17%). 直接互认 (Direct mutual recognition). LOW impact.
REGULATORY LINKAGE TABLE (法规联动)
| Compliance Scenario | Chinese Regulatory Basis | International Regulatory Basis |
|---|---|---|
| Mandatory product certification | CCC (China Compulsory Certification) for fire-rated windows | UKCA marking for construction products |
| Engineering acceptance inspection | GB 50210-2018 (建筑装饰装修工程质量验收规范) | Building Regulations Approved Document L (thermal) |
| Import/export compliance | CCIB commodity inspection | UK customs: CE marking (transitional) or UKCA |
| Designer/engineer obligation | GB 50009-2012 (wind load design) | Eurocode 1 (EN 1991-1-4) |
AUDIT FLAG RESOLUTION
- ✅ RESOLVED: GB/T 32223-2025 title corrected to "通用要求 (General requirements)" per official SAMR record. Do NOT write "自锁窗五金件 (Self-latching window hardware)".
- ✅ RESOLVED: GB/T 32223-2025 status is CURRENT (现行). No supersession note needed.
- ✅ RESOLVED: BS 13126-1:2018 edition confirmed as current. No later edition found in knowledge base.
PROCUREMENT VERDICT
- Verify static load ≥1,000 N per BS 13126-1:2018 §6.4.1 — CN standard only requires 800 N.
- Upgrade corrosion resistance to ≥240 h neutral salt spray per BS 13126-1:2018 §6.6.1.
- Confirm cyclic durability test method equivalence — both require 100,000 cycles.
- Obtain UKCA marking for UK market compliance.
- Request factory test reports for all parameters above.
REFERENCE DOCUMENT CHECKLIST (配套调阅清单)
- GB/T 32223-2025 §5.4.1 — static load test method
- BS 13126-1:2018 §6.4.1 — static load value (1,000 N)
- BS 13126-1:2018 §6.6.1 — corrosion resistance duration (240 h)
FIELD INSPECTION CHECKLIST
- Verify latch bolt static load test setup per BS 13126-1:2018 §6.4.1
- Check salt spray chamber calibration for 240 h test
- Measure operating force with calibrated force gauge (≤50 N per CN, ≤60 N per UK)
- Confirm cyclic test machine counts ≥100,000 cycles
- Inspect corrosion protection coating thickness (≥12 μm per BS 13126-1:2018 §6.6.2)
CONFIDENCE RATING
🟡 MEDIUM CONFIDENCE (auto-downgraded from HIGH: 1 standard number(s) failed local DB validation)
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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