Description
FHDM Flame-Retardant Timber Test Apparatus | Wood Crib Method Wood Fire Resistance Tester GA/T42.1
1. Product Overview
The FHDM Flame-Retardant Timber Test Apparatus strictly follows the GA/T42.1 standard Test methods for burning behavior of flame-retardant timber — Wood crib method. It is a professional laboratory testing machine dedicated to evaluating the fire performance of flame-retardant impregnated timber with thickness over 20mm used in construction, furniture and engineering projects.
Under standardized combustion conditions, this equipment accurately detects two core indicators: the flaming combustion duration and mass loss rate of wood samples, providing reliable data to judge whether lumber meets flame-retardant qualification standards. The whole machine adopts intuitive panel operation with independent displays for ignition time, after-flame time and furnace temperature, featuring easy setup, stable gas control and high test repeatability.
2. Applicable Test Standard
GA/T42.1 Test methods for burning behavior of flame-retardant timber — Wood crib method
3. Core Technical Parameters
- Ambient working environment: Temperature room temperature ~ 35℃, Humidity ≤70%
- Operating voltage: AC 220V±10V
- Fuel supply: Natural gas / Liquefied petroleum gas (LPG)
- Timing precision: 3min ignition timing error ≤ ±0.1s (fully meets GA/T42.1 requirement)
- Temperature control accuracy: Target test temperature 310℃, tolerance ≤ ±10℃
- Specimen standard size: 76mm × 13mm × 13mm, cutting tolerance ±1mm
- Standard sample layout: 12 layers, 2 pieces per layer, 24 pieces per test group
4. Specimen Preparation Requirements
- Sample dimension: 76mm×13mm×13mm with flat smooth surface; 3 groups of samples required per wood type, 24 pieces per group.
- Sampling rule: Cut samples 0.6mm away from timber longitudinal ends; short timber (below 1m) shall be sampled from the middle section to both sides.
- Sampling position: Cut two parallel strips from upper and lower width surfaces of wood, then cut to 76mm length; central core material is not used for testing.
- Constant mass conditioning before test: Store samples at 23±2℃, 50±5% RH until the mass change of two consecutive 24h weighings ≤1%.
5. Standard Test Flow
- Weigh conditioned sample group with precision of 0.1g.
- Stack samples into a cross-shaped wood crib (12 layers, 2 pieces/layer, 25mm spacing between pieces).
- Power on and reset; the Bunsen burner automatically moves to ignition position.
- Turn on gas supply, adjust flow valve and ignite burner; tune flame height to 250mm.
- Press Run button, burner moves under the heat shield; adjust gas mixture to stabilize hood top temperature at 310℃±10℃, then retract burner.
- Place wood crib on the support bracket, close observation window and start test. Burner automatically ignites the bottom of samples with fixed 3-min flame exposure, then retracts.
- Record flaming combustion time in real time; stop timing once the flame extinguishes.
- After full combustion & glowing decay, cool all samples and residues completely, then weigh total residual mass.
6. Flame Retardant Timber Qualification Judgment Standard
Wood material passes flame retardant certification if both two conditions are satisfied:
- Flaming combustion time ≤ 6 minutes
- Mass loss rate after combustion ≤ 60%
7. Main Product Features
- Standard wood crib method design fully compliant with GA/T42.1, recognized for official fire retardant wood inspection reports.
- Independent digital displays for ignition time, after-flame time and furnace temperature; separate gas flow adjustment knob for stable flame control.
- High-precision timing module with ±0.1s accuracy for mandatory 3-minute flame exposure test.
- Stable temperature control system maintaining 310℃ test condition within ±10℃ tolerance for consistent test environments.
- Automatic burner forward/retract function to avoid manual flame operation errors and improve test safety.
- Transparent observation window for real-time visual monitoring of wood burning status without interrupting the test.
- Compatible with both natural gas and LPG fuel sources, flexible for different laboratory gas supply conditions.
- Compact integrated bench structure, easy to install, operate and clean after testing.
8. Target Customers & Application Scenarios
- Flame retardant wood processing factories
- Construction & timber engineering inspection institutions
- Fire safety testing laboratories
- Furniture & wood material R&D laboratories
- Third-party fire certification testing centers
- Forestry and building material research institutes
9. Why Choose FHDM Flame-Retardant Timber Test Apparatus
✅ Strictly built per GA/T42.1 wood crib method standard, test data valid for official fire resistance certification
✅ Triple digital display for ignition time, after-flame time and temperature, intuitive reading without calculation
✅ Ultra-precise timing and temperature control guarantee repeatable, accurate test results
✅ Dual gas compatibility (natural gas / LPG) fits all lab gas supply environments
✅ Automatic burner movement reduces manual operation and improves testing safety
✅ Clear observation window allows real-time monitoring of sample combustion behavior
✅ Bench-top compact design, easy maintenance and low space occupation for small & medium labs
✅ Triple digital display for ignition time, after-flame time and temperature, intuitive reading without calculation
✅ Ultra-precise timing and temperature control guarantee repeatable, accurate test results
✅ Dual gas compatibility (natural gas / LPG) fits all lab gas supply environments
✅ Automatic burner movement reduces manual operation and improves testing safety
✅ Clear observation window allows real-time monitoring of sample combustion behavior
✅ Bench-top compact design, easy maintenance and low space occupation for small & medium labs
