TESTech TTech-GBT11049 Carpet Flammability Tester – Hexamethylenetetramine Tablet Method
| Brand | TESTech |
|---|---|
| Model | TTech-GBT11049 |
| Standard Compliance | GB/T 11049–2008 |
| Chamber Dimensions | 300 mm × 300 mm × 300 mm (L×W×H) |
| Test Specimen Size | 230 mm × 230 mm |
| Stainless Steel Test Plate | 230 mm × 230 mm × 6.5 mm with 205 mm Ø central aperture |
| Calibrated Steel Ruler | 1 mm graduation |
| Timing Device | ±1 s accuracy |
| Power Supply | AC 220 V, 50 Hz |
| Accessories | Hexamethylenetetramine tablets, PE gloves, indicating silica gel desiccant, ignition device |
| Optional | Fume hood integration |
Overview
The TESTech TTech-GBT11049 Carpet Flammability Tester is a precision-engineered instrument designed to evaluate the surface flammability behavior of carpet materials under standardized laboratory conditions, in strict accordance with GB/T 11049–2008 (“Flammability of Carpets — Test Method Using Hexamethylenetetramine Tablets”). This method employs a controlled, small-scale ignition source—specifically, a pre-weighed hexamethylenetetramine tablet—to initiate combustion on horizontally oriented carpet specimens. The test quantifies two primary performance indicators: flame spread time (i.e., time elapsed from ignition to flame front reaching a defined reference mark) and char length (i.e., maximum extent of thermal degradation along the specimen surface, measured in millimeters). As a horizontal-position test, it reflects surface ignition resistance rather than vertical flame propagation or full-scale fire growth dynamics; therefore, results are strictly limited to comparative material evaluation within the scope of the standard and are not predictive of real-world fire hazard scenarios.
Key Features
- Robust stainless steel test chamber (300 mm × 300 mm × 300 mm internal volume) ensures dimensional stability, corrosion resistance, and thermal containment during repeated testing cycles.
- Dedicated stainless steel support plate (230 mm × 230 mm × 6.5 mm) with a precisely machined 205 mm diameter central aperture provides uniform specimen positioning and unobstructed airflow beneath the sample—critical for reproducible heat transfer and flame development.
- Integrated calibration-grade steel ruler (1 mm graduation) mounted adjacent to the test zone enables direct, traceable measurement of char length without specimen removal, minimizing operator variability.
- High-accuracy timing system (±1 s resolution) synchronized with ignition initiation supports reliable flame spread time recording per GB/T 11049–2008 Section 7.3.
- Comprehensive accessory set includes certified hexamethylenetetramine tablets (pre-validated mass and composition), powder-free polyethylene gloves (to prevent contamination of specimen surfaces), and indicating silica gel desiccant (to maintain specified ambient humidity per Clause 5.2).
- Modular design accommodates optional integration with laboratory fume hoods (via rear exhaust port), ensuring operator safety and compliance with institutional chemical hygiene plans during repetitive operation.
Sample Compatibility & Compliance
The TTech-GBT11049 accepts flat, non-curling carpet specimens measuring exactly 230 mm × 230 mm, accommodating woven, tufted, needle-punched, and laminated constructions across natural (e.g., wool, cotton) and synthetic (e.g., nylon, polypropylene, polyester) fiber systems. Specimens must be preconditioned at (23 ± 2) °C and (50 ± 5)% RH for a minimum of 48 h prior to testing, as stipulated in GB/T 11049–2008 Clause 6. The apparatus satisfies all physical configuration and procedural requirements outlined in Clauses 4 (Apparatus), 5 (Conditioning), and 7 (Procedure) of the standard. While not directly aligned with ASTM D2859 or ISO 6925, its operational parameters are technically harmonized with fundamental principles of small-flame horizontal surface ignition testing used in regulatory frameworks governing commercial flooring in China’s building product certification system (e.g., CCC marking for flame-retardant carpets).
Software & Data Management
This is a manually operated, non-automated test system requiring direct human observation and measurement. No embedded software or digital data logging is included—consistent with the analog methodology prescribed by GB/T 11049–2008. All test records—including specimen identification, conditioning environment logs, tablet mass, ignition time, flame arrival time at reference marks, char length, and observer annotations—are documented on standardized paper-based test forms (per Annex A of the standard). Laboratories implementing electronic recordkeeping may integrate the TTech-GBT11049 into validated LIMS or ELN platforms via manual entry; however, no API, USB, or RS-232 interface is provided. For GLP/GMP environments, users must establish written SOPs covering equipment verification (e.g., chamber dimension checks, ruler calibration traceability), tablet lot qualification, and observer training—particularly for flame endpoint determination, which remains a visually assessed parameter.
Applications
The TTech-GBT11049 serves quality control laboratories in carpet manufacturing facilities, third-party testing institutes accredited to CNAS (China National Accreditation Service), and R&D departments developing flame-retardant backings or fiber treatments. It supports batch release testing against mandatory national specifications for carpets installed in public buildings (e.g., hotels, schools, hospitals) under China’s GB 50222–2017 “Code for Fire Protection Design of Interior Decoration.” Additionally, it facilitates comparative screening of flame inhibitor efficacy (e.g., phosphorus- or nitrogen-based additives), substrate–fiber interface effects on charring behavior, and aging-induced flammability shifts following UV exposure or abrasion cycling. Its simplicity and repeatability make it suitable for proficiency testing programs among regional testing centers.
FAQ
Is this instrument compliant with international standards such as ASTM or ISO?
No—the TTech-GBT11049 is purpose-built for GB/T 11049–2008 only. It does not replicate the geometry, ignition source, or measurement protocol of ASTM D2859 (Limiting Oxygen Index), ISO 6925 (Radiant Panel Test), or EN 13501-1 (Fire Classification). Cross-standard correlation is not scientifically valid.
Can the device be used for non-carpet floor coverings like rugs or mats?
Only if they meet the definition of “carpet” per GB/T 11049–2008 (i.e., textile floor covering ≥ 1.5 mm thick, with pile, loop, or flat-woven structure). Vinyl, rubber, or cork-based products fall outside the standard’s scope and require alternative test methods.
What maintenance is required to ensure long-term measurement consistency?
Monthly verification of chamber interior dimensions, annual recalibration of the steel ruler against a NIST-traceable standard, and quarterly replacement of indicating silica gel (when >50% color-changed) are recommended. The stainless steel plate should be cleaned with ethanol after each test series to remove residue.
Does the system include flame detection sensors or automated timing triggers?
No. Flame arrival time and char length are determined visually by trained operators using the integrated ruler and handheld stopwatch—fully aligned with the manual assessment requirement in Clause 7.4 of GB/T 11049–2008.
Is electrical safety certification provided for export markets?
The unit carries CE marking for EMC and Low Voltage Directive compliance (2014/30/EU and 2014/35/EU) and meets IEC 61010-1:2010 for laboratory electrical equipment. Additional country-specific certifications (e.g., UL, UKCA) require end-user responsibility.
