NH-XL Vertical Integrated Fire Resistance Test Furnace

The NH-XL Vertical Integrated Fire Resistance Test Furnace (Vertical Comprehensive Fire-Resistance Test Furnace) is a full-scale, automated laboratory testing system engineered to evaluate the fire-resistance limit, thermal insulation performance, and structural integrity of vertical fire-partition walls, doors, windows, glass, roller shutters, and check valves/non-return valves. It strictly complies with ISO 834-1/4/8, EN 1363-1, EN 1634-1, BS 476 (Parts 20/22), ASTM E119, UL 263, and mandatory national standards GB/T 9978 and GB 12955-2024.

Built with a robust enamel-coated steel outer shell, lightweight high-alumina fiber suspended furnace body, zirconium-fiber block insulation capable of withstanding up to 1300°C, an 8-burner proportional gas combustion array, and automatic closed-loop pressure/temperature control, this heavy-duty Fire Resistance Testing Furnace provides authoritative compliance data for building material manufacturers, third-party fire testing laboratories, marine classification societies, and construction quality inspection bureaus.

Vertical Comprehensive Fire-Resistance Test Furnace Compliance & Standards

This vertical fire resistance testing furnace allows certified laboratories to perform formal fire limit assessments across global building, marine, and door/window safety standards:

Technological Features of H-XL Fire Resistance Test Furnace

• Advanced Thermal Lining & High-Temperature Resistance: Constructed with a baked-enamel steel outer casing and a lightweight high-alumina fiber suspended roof lined with zirconium-fiber wool block modules, ensuring minimal heat loss up to a maximum operating temperature of 1300°C.
• 8-Burner Proportional Gas Combustion System: Fueled by Natural Gas or LPG, the 8-burner array delivers uniform open-flame heating controlled via programmed temperature-rise software according to the standard curve: $T – T_0 = 345 \lg (8t + 1)$.
• Automated Closed-Loop Furnace Pressure Control: Precision pressure sensors located 100mm from the specimen surface dynamically adjust exhaust dampers to maintain constant furnace pressure (15 ± 5 Pa at 5 min, 17 ± 3 Pa at 10 min).
• Computer-Aided Management & Multi-Channel Thermal Monitoring: Fully automated program-driven operation logs real-time unexposed face temperature rises (monitoring mean 140°C and single-point 180°C insulation limits) and structural integrity loss.
• External Specimen Mounting & Rear Exhaust Integration: External specimen fixing layout facilitates rapid loading and unloading of 3m × 3m test frames. The rear mechanical smoke exhaust connects directly to facility dust-removal and scrub systems.

Technical Specifications of Vertical Comprehensive Fire-Resistance Test Furnace

System Architecture & Testing Workflow of H-XL Fire Resistance Test Furnace

Standardized Testing Workflow:

1. Mount the vertical specimen (fire door, window, glass partition, roller shutter, or non-return valve) onto the 3m × 3m test frame and position it at the furnace front.
2. Attach unexposed face thermocouples to record surface temperature rise and integrity monitoring instruments.
3. Initialize the automated program on the PC interface and trigger the 8 gas burners.
4. The proportional control system adjusts fuel and air supply to track the standard time-temperature curve $T – T_0 = 345 \lg (8t + 1)$ while maintaining furnace pressure at 15–17 Pa.
5. Monitor specimen integrity and insulation failure; upon test termination, automatically extinguish burners, archive test data, and activate rear mechanical smoke exhaust.

Target Customer Applications:

• Fire doors, fire windows, glass curtains, and roller shutter manufacturers.
• HVAC check valves, oil-fume exhaust non-return valves, and fire damper production lines.
• Third-party fire protection product inspection bureaus and international certification bodies.
• Civil engineering, architectural safety, and fire research institutes.

H-XL Vertical Comprehensive Fire-Resistance Test Furnace FAQ

Q1: What types of specimens can be evaluated using this vertical test furnace?

A: The H-XL furnace evaluates non-loadbearing and loadbearing vertical separating elements, including fire doors, fire windows, fireproof glass partitions, roller shutters, hollow wall panels, and ventilation/oil-fume exhaust check (non-return) valves.

Q2: How does the furnace control pressure according to GB/T 9978 and EN 1363?

A: Pressure sensors continuously measure furnace pressure at a 3m height, 100mm from the specimen. The automated PLC system dynamically adjusts the rear mechanical exhaust damper to maintain 15 ± 5 Pa at 5 minutes and 17 ± 3 Pa at 10 minutes.

Q3: What indicates a loss of thermal insulation during testing?

A: Loss of thermal insulation is recorded when either the average temperature rise on the unexposed face of the specimen exceeds 140°C above the initial temperature, or the temperature rise at any single measurement point exceeds 180°C above its initial value.