Fireproof coatings tester chamber method
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The fire-retardant coating tester (combustion chamber method) is primarily used to test the flame-retardant performance of fire-retardant coatings applied to the surface of combustible substrates under laboratory conditions. According to the GB12441-2018 standard, the test methods include the small chamber method, the large panel method, and the tunnel method. The test results are usually evaluated based on the mass loss during combustion and the charring volume to assess the quality of the fire-retardant coating.
Application
The fire-retardant coating combustion test apparatus (small chamber method) and the fire-retardant coating small sample test furnace are used to conduct combustion tests under laboratory conditions to determine the flame spread performance of fire-retardant coatings applied to the surface of combustible substrates.
Standards
GB 14907—1994:General specifications of fire resistive coating for steel structure
GB 14907—2002:Fire resistive coating for steel structure
ETAG：2006:European Technical Approval Guideline 2006
BS 8202:1992:2:Coatings for fire protection of building elements - Part 2: Code of practice for the use of intumescent coating systems to metallic substrates for providing fire resistance
Feature
Complies with national standards: The testing instrument complies with the requirements of GB12441-2018 "Classification and Test Methods for Fire Performance of Decorative Fire-Retardant Coatings," ensuring the accuracy and reliability of the test results.
Compatible with multiple test methods: The equipment is compatible with various test methods, including the small chamber method, large panel method, and tunnel method, meeting different testing needs.
Testing under laboratory conditions: Suitable for testing the fire resistance performance of fire-retardant coatings applied to the surface of combustible substrates under laboratory conditions, using combustion mass loss and charring volume to evaluate the quality of the fire-retardant coating.
Structural design: The equipment has a reasonable structural design, complying with international flame retardant testing standards, ensuring the safety and effectiveness of the testing process.
Wide range of applications: Suitable for determining the flame resistance characteristics and flame resistance time of decorative fire-retardant coatings applied to the surface of combustible substrates, as well as experiments on flame propagation characteristics.
Sample making
1. The test plate of the fireproof coating tester (small chamber method) is made of birch five-layer plywood conforming to GB738-75 "broadleaf wood plywood", its size is 300mmx150mmx5mm, and the surface of the sample should be smooth and smooth, without joints and other defects.
2. before the test board is coated with fireproof paint, the state should be adjusted to constant at the temperature of 25±1℃ and the relative humidity of 60%——70% (the weight change of 24h interval is not more than 0.1%)。
3. according to the coating ratio of 200——250g/m2 (thick paste coating allows to increase to 500g/m2) to test the fire retardant coating evenly covered on the surface of the test plate and around, when the need for multiple coating, the interval between two times should be 24h.
The finished specimens shall be adjusted to constant weight according to the condition state specified in 2 articles, and ten specimens of each fireproof coating shall be prepared.
Technical parameters
| Item | Description |
|---|---|
| Instrument Structure | Composed of a main control box and a combustion box. The control box is movable, made of electrostatic steel plate (t=1.2mm) with a spray-painted surface for a smooth and aesthetic appearance. |
| Observation Window | Equipped with a glass window on the front for observing the sample's combustion status at any time. |
| Burner Material | Made of brass. |
| Temperature Control System | Digital temperature control system. |
| Thermocouple Specifications | Outer diameter: 2mm, Accuracy: Class II, Range: 1300℃. |
| Timer Accuracy | Error not exceeding 1s/h. |
| Alarm System | Alarms every 15 seconds during the test to remind the operator to record the current combustion status. Combustion duration: 4 minutes. |
| Gas Source | Liquefied petroleum gas or natural gas. |
| Rotameter | Adjustable flow rate of combustion gas. |
| Pressure Regulator | High-precision pressure regulator to adjust the gas pressure to standard requirements. |
| Power Requirements | AC220(±10%)V/50HZ. |
| Control System | Relay control system with all electronic components from well-known domestic brands to ensure better machine performance and detection accuracy. |
| Safety Features | Overload and short-circuit protection for the power supply. |
| Instrument Dimensions | Approximately 340mm x 230mm x 794mm. |
| Sample Holder Tilt Angle | Can be tilted 45° ± 2°. |
| Copper Combustion Cup Specifications | Outer diameter: 24mm ± 0.1mm, Wall thickness: 1mm ± 0.06mm, Height: 17mm ± 0.1mm, Volume: 6mL. |
| Fuel | Chemically pure grade anhydrous ethanol. |
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