ASTM D6113 Standard Test Method for Using Cone Calorimeter to Determine Fire-Test-Response Characteristics of Insulating Materials Contained in Electrical or Optical Fiber Cables

Get Certified ASTM D6113 

ASTM D6113 is a controlled test of the fire response of insulating material from electrical or optical fiber cables. The cone calorimeter applies a defined radiant heat flux to the sample and measures the fire-response properties that it produces. However, quantitative heat-release measurements help compare insulating materials and assess changes resulting from component changes or composite constructions. The results help with product development and cable design studies. 

• Determines the time to sustained flaming.
• Measures the amount of heat produced.
• Calculates overall heat emitted.
• Calculates efficient heat of combustion.
• Determines specific extinction area.
• Uses a constant radiant heat flux.
• Tests electrical insulating materials in electrical or optical fiber cables. 

What are the Uses of ASTM D6113 Testing?

ASTM D6113 is a fire test for cable insulating materials that provides quantitative data on their fire response. Laboratories use the results to test material changes and to compare fire performance in a controlled cone calorimeter. This standard-

• Assists in electrical and optical cable design.
• Supports product development.
• Aids in the comparison of changes in fire performance.
• Gives quantitative data on heat release.
• Aids in the classification of the fire response of cable insulating materials. 

What Materials Can Be Tested Under ASTM D6113? 

The test method applies to insulating materials used in electrical or optical fiber cables. The tests include a burning test of the electrical insulating materials in the cables when technicians subject the cable test specimens (excluding accessories) to radiant heat. Factors that influence fire-test response characteristics include the thickness of the material used as a test specimen (whether as a plaque or as a coating on a wire or cable) and the diameter of the wire or cable.

Why is ASTM D6113 Important? 

ASTM D6113 provides quantitative data on the fire response of the insulating components of electrical and optical cables. This method enables laboratories to determine several fire-response properties under controlled radiant exposure. It is used as a tool to detect alterations in fire performance after altering single components or composite cable structures. Additionally, according to ASTM, the fire-test-response characteristics vary depending on specimen thickness and the diameter of the cable/wire. 

ASTM D6113  Testing Process and Data Collection

Technicians prepare the cable test specimen and subject the cable’s insulating material to a specified constant radiant heat flux in the cone calorimeter. The apparatus keeps track of the fire response during the exposure. The laboratory records the data required to determine time to sustained flaming, heat release rate, total heat released, effective heat of combustion, and specific extinction area. The analyst then compares those measurements to determine the fire response of the tested insulating material. 

Common Challenges and Troubleshooting

Accurate results require consistent specimen preparation, controlled radiant exposure, and proper operation of the cone calorimeter. Technicians maintain the specified test conditions throughout the measurement. The laboratory should also take into account the thickness of the specimen and the diameter of the cable or wire, as these influence fire-test-response results. 

• The technician records the time required for the tested insulating material to sustain a flaming burn.
• The analyst determines the heat release rate and total heat released from the measured fire response.
• The laboratory determines the effective heat of combustion and specific extinction area according to the applicable procedure.
• The engineer considers the specimen thickness and the wire or cable diameter when interpreting the measured fire-response characteristics, as the ASTM does.
• Engineers use the resulting fire-response data to support cable design, product development, and comparison of changes in fire performance under controlled test conditions. 

Link to ASTM D6113