CN Quality Check
Standards Comparison Tool
EXECUTIVE SUMMARY
Scope: 簇绒地毯 (Tufted carpets) — GB/T 11746-2008 (CURRENT, 现行) plus mandatory emission limits GB 18587-2001 and sibling carpet standards. Equivalence landscape: no IDT relationship exists — GB/T 11746 is a product-specification standard while ISO/EN counterparts are classification + test-method standards, so comparison is MOD at best. Key implication: Chinese tufted carpet cannot be certified to EN 1307 use-classes without additional testing; VOC compliance (GB 18587-2001, mandatory) is a separate gate from GB/T 11746.
APPLICABLE CHINESE STANDARDS
| Standard No. | Title (Chinese) | Scope | Mandatory/Recommended | Status |
|---|---|---|---|---|
| GB/T 11746-2008 | 簇绒地毯 (Tufted carpets) | Tufted carpet construction, physical performance, tolerances | Recommended (推荐性) | Current (现行) |
| GB 18587-2001 | 室内装饰装修材料 地毯、地毯衬垫及地毯胶粘剂有害物质释放限量 (Emission limits of harmful substances from carpets, underlays and adhesives) | VOC/formaldehyde release limits | Mandatory (强制性) | Current |
| GB/T 14252-2008 | 机织地毯 (Woven carpets) | Woven carpet product spec | Recommended | Current |
| GB/T 15050-2008 | 手工打结羊毛地毯 (Hand-knotted wool carpets) | Hand-knotted product spec | Recommended | Current |
| GB/T 18044-2008 | 地毯静电性能 (Carpet electrostatic properties) | Static behaviour | Recommended | Current |
| GB 8624-2012 | 建筑材料及制品燃烧性能分级 (Classification for burning behaviour of building materials) | Fire class of floor coverings | Mandatory | Current |
| GB 50209-2010 | 建筑地面工程施工质量验收规范 (Code for acceptance of construction quality of building floors) | Installation/acceptance | Mandatory (code) | Current |
STANDARD TIER CLASSIFICATION
| Standard | Tier | Description |
|---|---|---|
| GB/T 11746-2008 | TIER 1 — Product Standard | Tufted carpet requirements |
| GB 18587-2001 | TIER 1 — Product Standard (mandatory limits) | Emission limits |
| ISO 1765/1766/2094/4918 | TIER 2 — Test Method | Thickness, mass, thickness loss, castor chair |
| GB 50209-2010 | TIER 3 — Installation/Acceptance Code | On-site floor acceptance |
| ISO 10874 / ISO 2424 / EN 1307 | TIER 4 — Classification | Use-class, vocabulary, pile carpet classes |
| GB 8624-2012 | TIER 4 — Classification | Fire class |
FLAG: GB 8624-2012 (TIER 4) is legitimately invoked for floor coverings via its 铺地材料 (floor coverings) chapter — valid extension, not misapplication.
SCOPE BREAKDOWN
簇绒地毯 (Tufted carpets) — product performance
Chinese standard: GB/T 11746-2008: 簇绒地毯 (Tufted carpets)
International equivalent: EN 1307:2014 (Textile floor coverings — Classification of pile carpets) — ⚠️ classification standard, not product spec
Equivalence: NEQ (different document type)
Standard tier match: ⚠️ Tier mismatch: CN TIER 1 product spec vs INT TIER 4 classification — comparison valid only on shared parameters
| Parameter | Chinese Standard Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| 绒簇拔出力 (Tuft withdrawal force) | ≥ 8 N [Verify: GB/T 11746-2008 §5] | ISO 4918 castor-chair (different property) | different test method (no direct comparison) | 不可互认 (Not mutually recognised) | HIGH |
| 背衬剥离强力 (Delamination strength) | ≥ 1.5 N/cm [Verify: GB/T 11746-2008 §5] | Not specified in EN 1307 | N/A (only CN requires) | 不可互认 (Not mutually recognised) | MEDIUM |
| 单位面积质量 (Mass per unit area) | Declared ±tolerance [Verify: GB/T 11746-2008 §5] | ISO 1766 method | identical method basis | 附加测试后互认 (Mutual recognition after additional testing) | LOW |
| 厚度 (Thickness) | Declared [Verify: GB/T 11746-2008 §5] | ISO 1765 method | identical method basis | 附加测试后互认 (Mutual recognition after additional testing) | LOW |
| 动态负载厚度减少 (Thickness loss) | [Verify: GB/T 11746-2008 §5] | ISO 2094 method | identical method basis | 附加测试后互认 (Mutual recognition after additional testing) | MEDIUM |
| 燃烧性能 (Burning behaviour) | GB 8624-2012 class (mandatory) | EN 13501-1 class | different class scales | 不可互认 (Not mutually recognised) | HIGH |
有害物质释放 (Harmful substance emission) — mandatory gate
Chinese standard: GB 18587-2001 (mandatory)
International equivalent: GUT/EC carpet emission schemes; EN 14041 (⚠️ CE-relevant)
Equivalence: NEQ
Standard tier match: Both TIER 1 — valid comparison
| Parameter | Chinese Standard Value (Clause) | International Value (Clause) | Deviation | Mutual Recognition | Procurement Impact |
|---|---|---|---|---|---|
| 甲醛释放 (Formaldehyde release) | ≤ 0.05 mg/m²·h [Verify: GB 18587-2001 §4] | GUT limit differs | different test method (no direct comparison) | 不可互认 (Not mutually recognised) | HIGH |
| TVOC 释放 (TVOC release) | ≤ 0.50 mg/m²·h [Verify: GB 18587-2001 §4] | EN 14041 scheme | different test method | 不可互认 (Not mutually recognised) | HIGH |
KEY DIFFERENCES SUMMARY
- Document type — GB/T 11746 is product spec; EN 1307 is classification. No IDT possible. 不可互认 (Not mutually recognised). HIGH.
- Tuft bind / delamination — CN specifies both; EN 1307 does not. 不可互认 (Not mutually recognised). HIGH.
- Fire class — GB 8624-2012 vs EN 13501-1 scales differ; re-test required. 不可互认 (Not mutually recognised). HIGH.
- VOC emission — GB 18587-2001 mandatory; no mutual recognition with GUT/EN 14041. 不可互认 (Not mutually recognised). HIGH.
- Test methods (thickness, mass, thickness loss) — ISO-aligned; 附加测试后互认 (Mutual recognition after additional testing). LOW–MEDIUM.
REGULATORY LINKAGE TABLE (法规联动)
| Compliance Scenario | Chinese Regulatory Basis | International Regulatory Basis |
|---|---|---|
| Mandatory product certification | GB 18587-2001 emission limits (mandatory); GB 8624-2012 fire class | CE marking under EN 14041; GUT label |
| Engineering acceptance inspection | GB 50209-2010 (floor acceptance) | Local building regulation / EN 14041 DoP |
| Import/export compliance | CCIB commodity inspection; GB 18587-2001 test report | Destination customs + EN 13501-1 class |
| Designer/engineer obligation | GB 50209-2010 (装修工程验收) | Eurocode / local building regulation |
AUDIT FLAG RESOLUTION
- ✅ RESOLVED: GB/T 11746-2008 status = CURRENT (现行) per std.samr.gov.cn. No supersession note added.
- ✅ RESOLVED: Prefix is GB/T (recommended), NOT GB. Mandatory limits sit in GB 18587-2001.
- ✅ FALSE POSITIVE (domain flag): GB 8624-2012 — flagged as classification standard used outside tier; valid via 铺地材料 (floor coverings) chapter.
- ⚠️ UNRESOLVED: All numeric values (tuft bind, delamination, mass tolerance, thickness loss, formaldehyde, TVOC) — both drafts lacked clause-level confidence. Verify against GB/T 11746-2008 §5 and GB 18587-2001 §4.
- 🔴 CRITICAL CORRECTION: Draft A's "GB 18587-2001" was mislabelled as GB/T in Draft B's reasoning — correct designation is GB 18587-2001 (mandatory).
PROCUREMENT VERDICT
- Obtain GB/T 11746-2008 §5 test report (tuft bind, delamination, thickness loss) from factory.
- Obtain GB 18587-2001 mandatory emission test report — non-negotiable for China import.
- Obtain GB 8624-2012 fire class report for floor covering.
- If EU destination: commission EN 1307 use-class + EN 13501-1 re-test — no mutual recognition.
- Confirm declared mass/thickness tolerances against §5 before PO.
- Retain CCIB inspection certificate for customs.
REFERENCE DOCUMENT CHECKLIST (配套调阅清单)
- GB/T 11746-2008 §5 — tuft withdrawal force, delamination strength, mass/thickness tolerances, thickness loss
- GB 18587-2001 §4 — formaldehyde and TVOC release limits
- GB 8624-2012 铺地材料 chapter — fire class criteria
- GB 50209-2010 — floor installation acceptance
- EN 1307:2014 — use-class mapping
- EN 13501-1 — fire classification
FIELD INSPECTION CHECKLIST
- Verify pile type (割绒 cut pile / 圈绒 loop pile) matches declaration.
- Pull-test tuft bind at 3 random points; compare to §5 minimum.
- Check backing delamination by hand-peel at edges.
- Confirm emission test report lot number matches shipped batch.
- Verify fire-class label and GB 8624-2012 report on carton.
- Measure mass per unit area on 3 samples vs declared tolerance.
CONFIDENCE RATING
🔴 LOW — key numeric parameters (tuft bind, delamination, emission limits) unverified at clause level in both drafts; official standard texts required before procurement. Standard status and prefix confirmed 🟢 HIGH.
Technical comparison report — CN Quality Check Standards Tool. NOT a substitute for official standard texts or on-site verification. For physical compliance inspection in China: contact Yang Jia, Registered Supervision Engineer (注册监理工程师).
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