Description
NH-XW Horizontal Fire Resistance Test Furnace | ISO 834 GB/T 9978 Building Beam Slab Fire Limit Test Oven
1. Product Overview
2. Applicable Global & National Standards
International Standard
Chinese National Standards
- GB/T 9978.1 ~ GB/T 9978.8 Series: Fire-resistance test rules for beams, slabs, columns, load-bearing & non-load-bearing partition components
- GB 14907-2018 Fire-resistive coatings for steel structures
- GB/T 37267-2018 General technical requirements for building seismic supports
3. Core Technical Specifications
3.1 Furnace Body & Refractory Structure
- Internal Chamber Size: 4.2 m × 3.0 m × 1.5 m
- Max Working Temperature: 1300℃
- Lining Material: Lightweight high-density refractory bricks (service temp ≥1400℃, bulk density ≤1.0 g/cm³)
- Insulation Layer: High-temperature wool resistant above 1450℃
- Outer Shell: 2mm galvanized steel plate with double-side spray coating
- Main Frame: No.12/16/25 hot rolled C channel steel
- Surface Temp Control: Furnace outer wall surface temperature ≤50℃ during testing
- Fast Cooling: Furnace cool-down time less than 0.5 h after test completion
- Observation Ports: Dual-side 120×120mm high-temperature quartz glass viewing windows
- Auxiliary Platform: Full surrounding steel operation platform with safety guardrails
3.2 Standard Fire Temperature & Pressure Rules
- Standard Time-Temperature Curve Formula: T − T₀ = 345 lg (8t + 1)
- Initial furnace temperature range: 5℃ ~ 40℃
- Furnace pressure monitoring position: 3m height, 100mm away from specimen surface
- 5min after ignition: 15 Pa ± 5 Pa
- 10min after ignition: 17 Pa ± 3 Pa
- Fire resistance limit judgment indicators:① Loss of structural integrity ② Loss of thermal insulation (average temp rise >140℃ / single point >180℃ on unexposed side)
3.3 Combustion & Control System
- Fuel: Liquefied Petroleum Gas (LPG)
- Burner Quantity: 8 sets proportional combustion burners
- Ignition Mode: High voltage electronic automatic ignition
- Control Mode: Computer programmed temperature curve, auto proportional combustion + furnace pressure regulation
- Furnace Pressure Parameter: Measuring range ±250 Pa, accuracy ≤ ±2 Pa; auto gas cut-off overpressure protection when pressure >100 Pa
- Power Supply: AC 380V ±10%, 50Hz, total power 65kW
- Air Supply Capacity: >2600 m³/h
- Exhaust System: Rear mechanical exhaust, exhaust volume >4000 m³/h, flue gas filter resistant up to 400℃
- Specimen Installation: External hanging mounting design
- Overall Occupied Space: 10000 × 8000 × 5000 mm (L×W×H)
4. Outstanding Product Features
Fully compliant with ISO 834 and full GB/T 9978 standard system
Perfectly reproduces the standard fire temperature rise curve and furnace pressure requirements, test data recognized for building component fire resistance grading and steel fire coating certification reports.
High-temperature energy-saving refractory furnace lining
1400℃ lightweight refractory bricks and thick high-temperature wool insulation reduce external heat loss, furnace outer wall temperature controlled under 50℃, low energy consumption and safe operation. Short cooling cycle within 0.5h to improve daily test throughput.
8 sets proportional LPG burner auto temperature control
Multi-burner collaborative proportional combustion system accurately tracks the standard time-temperature curve, eliminating temperature deviation and ensuring uniform heating of beam & slab specimens across the whole furnace cavity.
Closed-loop automatic furnace pressure adjustment
High-precision pressure sensor with ±2Pa measurement accuracy, real-time exhaust volume linkage adjustment; overpressure interlock protection automatically cuts gas supply to avoid safety hazards.
Complete computerized intelligent management
All test parameters, temperature curves and pressure data are automatically collected, stored and exported; one-click program operation for full test cycle without frequent manual intervention.
Dual-side observation windows + safety operation platform
Large quartz glass viewing ports allow real-time monitoring of specimen collapse, cracking and coating peeling; surrounding full steel platform with guardrails ensures operator safety during long-time testing.
Powerful multi-scenario testing compatibility
Suitable for fire resistance limit test of concrete slabs, steel beams, steel columns, steel structure fireproof coatings, seismic supports and all horizontal load-bearing construction components.
Complete flue gas filtration exhaust system
High-flow exhaust unit with high-temperature flue gas filter meets workshop environmental emission standards, effectively capturing smoke and dust generated during combustion tests.
5. Application & Target Customers
- Construction engineering quality supervision and inspection institutions
- Third-party fire safety certification testing laboratories
- Steel structure manufacturing & fireproof coating factories
- Building material R&D institutes for fire-resistant boards & insulation materials
- University fire safety and structural engineering research labs
6. Why Choose NH-XW Horizontal Fire Resistance Furnace
Meets ISO 834 and full GB/T 9978 series standards for horizontal beam & slab fire resistance limit testing
Large 4.2×3.0×1.5m inner chamber with 8 proportional LPG burners for uniform standard fire heating
High-precision ±2Pa furnace pressure control with automatic overpressure gas cut-off safety protection
Computer programmed standard temperature curve, auto data recording and report export
Energy-saving high-temperature refractory lining, furnace outer wall ≤50℃ surface temp, fast 0.5h cooling
Dual-side high-temp observation glass and full safety operation platform for real-time test monitoring
High-flow filtered exhaust system, meets workshop environmental protection requirements
Wide application for steel structures, fire coatings, concrete slabs and all horizontal building load-bearing components
