Steel Structure Fire Retardant Coating Test Furnace

Fire Retardant Coating Test Furnace is a precision laboratory-scale fire resistance test furnace specifically designed for the thermal insulation efficiency deviation and thermal insulation efficiency attenuation testing of steel structure fire retardant coatings.

Fully compliant with ISO 834-1 standard requirements, it's provides the controlled, high-temperature fire exposure environment required to characterize the fire protection performance of intumescent and cementitious fire retardant coatings on small steel specimens — enabling manufacturers and laboratories to perform standard-compliant coating qualification testing without the cost and space requirements of full-scale structural fire resistance furnaces.

The small sample fire resistance test furnace accommodates three specimens simultaneously, with a horizontal test furnace volume of 1200 mm (L) × 1050 mm (W) × 450 mm (D) and a five-layer furnace wall capable of sustaining fire resistance temperatures up to 1600°C.

Fire Retardant Coating Test Furnace Applications：

Fire retardant coating manufacturers: thermal insulation efficiency deviation and attenuation testing for steel structure coating product qualification

Third-party certification and testing laboratories: small-sample fire resistance coating performance testing per ISO 834-1

Steel structure fabricators and specifiers: evaluation of fire retardant coating performance for structural steel protection applications

R&D departments: evaluation of new intumescent and cementitious fire retardant coating formulations and application thicknesses

Quality assurance programs: batch sampling and consistency verification of fire retardant coating thermal protection performance

Standards：

Itupports fire retardant coating fire resistance testing in compliance with internationally recognized fire protection and structural fire testing standards, including:

ISO 834-1: Fire resistance tests — Elements of building construction — General requirements

EN1363-1

GB/T 9978

Specifications：

Parameter	Unit	Value
Working voltage	V	AC 220 ±10%, 50 Hz
Power consumption	kW	3
Furnace pressure measurement range	Pa	0–100
Furnace pressure control	Pa	20 ±3
Airflow range	m³/min	0–50
Airflow accuracy	m³/min	≤ ±0.5
Fuel	–	0# or -10# diesel
Test temperature programs	℃	60 min: RT–925°C
		120 min: RT–1050°C
		180 min: RT–1115°C
		240 min: RT–1150°C
		300 min: RT–1180°C
		360 min: RT–1210°C
Furnace thermocouples	pcs	4
Back-fire thermocouples	pcs	2
Back-fire temperature accuracy	℃	±4
Temperature control mode	–	Average control or independent control optional
Temperature sensors	–	Armored K-type thermocouples, Class II
Heating method	–	Fully automatic spray burner
Data storage	sets	≥100
Timing range	min	0–360
Timing accuracy	–	High-precision digital timing
Specimen size	mm	500 × 500 × 6
External dimensions	m	1.6 × 1.6 × 1.6

Advantages：

Fire Retardant Coating Test Furnace Features：

Designed specifically for thermal insulation efficiency deviation and attenuation testing of steel structure fire retardant coatings

Horizontal test furnace internal dimensions: 1200 mm (L) × 1050 mm (W) × 450 mm (D) — compact laboratory-scale footprint

Three specimens tested simultaneously — efficient qualification throughput for R&D and production quality assurance

Five-layer furnace wall construction (outside to inside): steel structure frame, red brick periphery, fire-resistant high-temperature asbestos, refractory brick, mullite fire-resistant high-temperature cotton — rated to 1600°C fire resistance temperature

Furnace body outer surface temperature: does not exceed 45°C — safe for operator access during testing

Integrated instrument composition: vertical fire test furnace, combustion control, fuel supply, pressure release and measurement, flue gas emission system, computer control system, furnace temperature data acquisition system, test component temperature acquisition system, and special test software

Computer-controlled test execution with real-time temperature monitoring and automated data acquisition

Compliant with ISO 834-1 — internationally recognized fire resistance test standard

Theory and Method：

Thermal insulation efficiency testing evaluates the ability of a fire retardant coating to limit the rate of temperature rise in the protected steel substrate when exposed to the standard fire curve. Three coated steel specimens are placed in the horizontal test furnace and exposed to the ISO 834 time-temperature curve. The temperature at the steel substrate surface (below the coating) is measured continuously throughout the exposure period using the test component temperature acquisition system, while the furnace chamber temperature is tracked by the furnace temperature data acquisition system. Thermal insulation efficiency deviation measures the variation between the actual measured substrate temperature and the target temperature profile, quantifying how consistently the coating maintains its fire protection performance.

Thermal insulation efficiency attenuation measures the degradation of coating performance over extended fire exposure — characterizing the coating's behavior as the intumescent char forms, expands, and eventually begins to degrade. The computer control system manages the entire test sequence, including furnace temperature control, burner modulation, flue gas emission system operation, and real-time data acquisition and analysis.

Operation and Maintenance Information：

(1) Supports touchscreen and PC control for easy operation and remote monitoring.

(2) Automatic heating, timing, real-time data display, and cooling ensure stable and efficient testing.

(3) Thermocouples and burner system should be regularly inspected to maintain measurement accuracy.

(4) Automatic exhaust cooling activates after the test to ensure safe operation.

(5) Regular calibration of temperature and pressure sensors is recommended for optimal performance.

(6) Maintain clean airflow passages and burner components to ensure consistent combustion and stable furnace pressure.