Lateral Flame Spread Test ISO 5658-2, IMO FTP Code

ISO 5658-2: LIFT (Lateral Flame Spread Test) / IMO Spread of Flame Apparatus

The LIFT / IMO Spread of Flame Apparatus, in accordance with ISO 5658-2, provides a standardized method for measuring the lateral spread of flame along the surface of vertically mounted test specimens exposed to a controlled gas-fired radiant heat panel.

This method is widely used to evaluate the reaction to fire performance of flat materials, composites, or assemblies in building, railway, and marine applications. Certain profiled products may also be tested under specified mounting conditions.

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Apparatus Construction

Frame Structure
- Fabricated from 40 × 40 mm square steel tubing
- Coated with white anti-corrosion paint for durability
Radiant Heat Panel
- Dimensions: 480 × 280 mm
- Porous ceramic refractory panel mounted in a stainless steel plenum chamber
- Provides stable, luminous flame-free radiant heat source
Gas Supply & Mixing System
- Propane gas and air supplied through a Venturi mixer
- Propane mass flow controller (±1% accuracy) for combustion gas control
- Blower with inverter for adjustable clean air supply
- Non-return valve and pressure regulator for safety in gas line
- Electrical shut-off valve for automatic gas cut-off in case of radiant panel failure
- Spark ignitor for reliable ignition
- Ceramic pilot flame burner (twin-bore Ø1.5 mm, 200 mm length)
Specimen Holder
- Constructed from stainless steel for durability and non-combustibility

Measurement & Calibration System

Heat Flux Meter
- Schmidt-Boelter type
- Measurement range: 0–50 kW/m²
- Equipped with integrated water-cooling unit (no external water supply required, no maintenance)
Calibration Gas Flow Control
- Methane gas mass flow controller (±1% accuracy) for system calibration
Calibration Materials
- Non-combustible calibration board (density: 950 ± 100 kg/m³)
- Non-combustible dummy specimen (density: 950 ± 100 kg/m³)

Control & Data Acquisition

Control System
- Industrial 15" touch screen computer for full test monitoring and operation
- Integrated standard operation software including:
  - Heat flux calibration
  - Methane gas calibration
  - Standard test procedure management

Automated test report generation