Fire Propagation Test Apparatus (BS 476 Part 7)

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The DNG Surface Spread of Flame Apparatus (Model: DNG-SFA01) is designed to determine the classification of the surface spread of flame on building materials as per BS 476 Part 7. This internationally recognized test method evaluates the flame propagation behavior on wall and ceiling surfaces under controlled radiant heat conditions.

As a trusted fire testing equipment manufacturer in India, DNG Technologies Pvt. Ltd., Faridabad, provides robust, accurate, and compliant solutions for surface flammability testing. The system ensures precise simulation of real-world fire exposure, helping industries verify compliance with British Standards (BS 476-7) and improve the fire safety of their materials.

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Features & Technical Specifications

Overview

The Surface Spread of Flame Test determines the rate and extent to which flames propagate over the exposed surface of materials when subjected to radiant heat and small flame ignition.
It is widely used in construction, transportation, and manufacturing industries to assess material classification and fire risk.

The test uses gas-fired radiant panels and a medium-sized gas burner to ignite samples, with a radiation intensity of 32.5 kW/m² at a distance of 75 mm. Samples are exposed for 10 minutes, and the flame spread is recorded at 1.5 minutes and 10 minutes to determine the classification (Class 1–4).

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Technical Features:

Stainless Steel Frame Construction:
Corrosion-resistant frame with a clean, durable design.
Integrated Ignition System:
Electronic ignition with automatic flameout and safety monitoring for reliable operation.
Exhaust System:
Stainless-steel exhaust pipe with removable sections for easy cleaning and integrated thermocouple.
Burner Assembly:
Stainless-steel burner tube (3.0 mm ID, 6.4 mm OD) with adjustable torch height (75–100 mm) and precise sample alignment (28 ± 2 mm exposure distance).
Radiant Heat Panel:
Porous refractory block panel (850 mm × 850 mm) ensures full combustion and uniform heat flux.
Sample Fixture:
Water-cooled steel panels maintain consistent sample temperature; cooling water flow rate of 12 L/min.
Gas Supply:
Propane or natural gas, with flow rate of 1500 ± 200 ml/min for stable combustion.
Data and Control Automation:
- 17" touch screen with LabVIEW-based control system
- Automatic radiation calibration
- Intelligent power output adjustment
- Real-time data logging and printable test reports

Specifications:

Power Supply: 220 V / 50 Hz
Weight: 400 kg
Gas Source: Propane or Natural Gas
Equipped with Air Blower

Applications

Building & Construction Materials:
Determine the surface spread of flame for wall panels, insulation boards, ceiling materials, and flooring systems.
Transportation & Automotive:
Assess fire performance of interior panels and cabin materials.
R&D and Certification Labs:
Conduct flame spread classification testing for product certification and compliance.

Standard Compliance

BS 476 Part 7 — Method of test to determine the classification of the surface spread of flame of products.

Why Choose DNG Technologies

With extensive expertise in fire testing equipment manufacturing, DNG Technologies Pvt. Ltd., Faridabad, delivers BS-compliant fire test apparatus that combine accuracy, safety, and automation. Our Surface Spread of Flame Tester supports critical quality control and certification processes across the construction, marine, aerospace, and automotive industries.

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