ASTM E84 Steiner Tunnel Test Furnace

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The ASTM E84 Building Materials Flame Spread Test Apparatus is designed to evaluate the combustion performance of flooring, ceiling, wall coverings, as well as insulation and thermal materials. You can accurately measure the Flame Spread Index (FSI) and Smoke Developed Index (SDI), allowing you to assess the fire safety of materials in real-world applications. This instrument provides reliable data to support building material safety design and compliance.

Standards

This test apparatus conforms to the following international standards:

ASTM E84 — Standard Test Method for Surface Burning Characteristics of Building Materials

NFPA 255 — Standard Method of Test of Surface Burning Characteristics of Building Materials

UL 723 — Standard for Test for Surface Burning Characteristics of Building Materials

ISO 5660 — Fire Testing — Heat Release and Flame Spread Measurements

Accessories

Tunnel furnace main unit

Dual-head flame nozzle

Sample mounting fixtures

Smoke collection and analysis system

Data acquisition and recording system

Parameters

Parameter	Specification
Test Method	ASTM E84 / NFPA 255 / UL 723
Flame Source	Dual-head nozzle of tunnel furnace
Test Duration	10 minutes
Measured Indicators	Flame Spread Index (FSI), Smoke Developed Index (SDI)
FSI Classification	Class A: 0–25Class B: 26–75Class C: 76–200
SDI Range	0–450
Applicable Materials	Wood, composite panels, decorative materials, insulation/thermal materials

Application

Interior and exterior building materials: Testing flame spread performance of floors, walls, and ceilings.

Insulation and thermal materials: Fire performance evaluation of polyurethane, mineral wool, glass wool, and other insulation products.

Furniture and composite panels: Fire resistance testing for plywood, upholstered furniture, and other wood or composite materials.

Other interior materials: Fire testing of coatings, wallpapers, and decorative panels.

Compatible test products: Tunnel furnace, dual-head flame nozzle, smoke collection system.

Features

Accurate Measurement: Quantifies fire performance through FSI and SDI values.

Multi-Standard Compliance: Supports ASTM, UL, NFPA, and other international standards.

Safe and Reliable: Controlled testing process ensures stable and repeatable data.

Easy Operation: Simple sample installation and test procedure suitable for routine lab use.

Wide Applicability: Covers interior and exterior decoration, insulation materials, and furniture panels.

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